Journal of Wind Engineering and Industrial Aerodynamics最新文献

英文中文

Structural dynamic equation informed LSTM to predict structural dynamic responses under wind load

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-04-08 DOI: 10.1016/j.jweia.2025.106099

Liujie Chen , Jinliang Lin , Jiyang Fu , Ching Tai Ng

For models with a small time step and long simulation duration, the wind-induced structural response of the finite element model by the numerical estimation method is often computationally expensive. With the rapid development of machine learning technology, the Long Short-term Memory (LSTM) has become an effective method to estimate structural response. In this paper, pure data-driven LSTM (P-LSTM) and the structural dynamic equation informed LSTM (SDE-LSTM) are proposed to predict multidimensional dynamic response (displacement, velocity and acceleration) of a single-degree-of-freedom (SDOF) system and multi-degree-of-freedom (MDOF) system. The predicted fittings of response of SDOF and MDOF are above 0.99. Combining multiple indicators including the coefficient of determination R², the mean absolute error (MAE), and the mean absolute percentage error (MAPE), the predictive models can be evaluated comprehensively and is beneficial to the optimization of models parameters. With setting different signal-to-noise ratio (SNR), the robustness is still good. The results of this study show that the SDE-LSTM and P-LSTM have high prediction accuracy, good generalization ability and robustness for predicting SDOF and MDOF system under wind excitation. Additionally, compared with the P-LSTM, SDE-LSTM can improve prediction accuracy, generalization ability and robustness.

{"title":"Structural dynamic equation informed LSTM to predict structural dynamic responses under wind load","authors":"Liujie Chen , Jinliang Lin , Jiyang Fu , Ching Tai Ng","doi":"10.1016/j.jweia.2025.106099","DOIUrl":"10.1016/j.jweia.2025.106099","url":null,"abstract":"<div><div>For models with a small time step and long simulation duration, the wind-induced structural response of the finite element model by the numerical estimation method is often computationally expensive. With the rapid development of machine learning technology, the Long Short-term Memory (LSTM) has become an effective method to estimate structural response. In this paper, pure data-driven LSTM (P-LSTM) and the structural dynamic equation informed LSTM (SDE-LSTM) are proposed to predict multidimensional dynamic response (displacement, velocity and acceleration) of a single-degree-of-freedom (SDOF) system and multi-degree-of-freedom (MDOF) system. The predicted fittings of response of SDOF and MDOF are above 0.99. Combining multiple indicators including the coefficient of determination R<sup>2</sup>, the mean absolute error (MAE), and the mean absolute percentage error (MAPE), the predictive models can be evaluated comprehensively and is beneficial to the optimization of models parameters. With setting different signal-to-noise ratio (SNR), the robustness is still good. The results of this study show that the SDE-LSTM and P-LSTM have high prediction accuracy, good generalization ability and robustness for predicting SDOF and MDOF system under wind excitation. Additionally, compared with the P-LSTM, SDE-LSTM can improve prediction accuracy, generalization ability and robustness.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"262 ","pages":"Article 106099"},"PeriodicalIF":4.2,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Field study on pressure fluctuations and comfort analysis when high-speed train passes through large-slope tunnels and tunnel groups

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-04-07 DOI: 10.1016/j.jweia.2025.106100

Quan Du , Yuangui Mei , Yao Ma

High-speed trains passing through 25 ‰ sloped tunnels and tunnel groups experience complex and varying pressure environments within the tunnel. When these external pressure fluctuations are transmitted into the carriages, they alter the internal pressure environment and affect the passenger comfort. In this paper, field measurements have been used to study the influences of tunnel lengths, slopes and tunnel groups on the interior and exterior pressure variation of the train and pressure comfort. The key findings reveal that the atmospheric pressure in single-slope tunnels changes linearly with tunnel altitude at a rate of 10.21 Pa/m. External negative pressures in the uphill tunnels and external positive pressures in the downhill tunnels demonstrate a linear and positive relationship with tunnel lengths. Tunnel slopes and tunnel groups worsen the pressure comfort environments. Additionally, during actual operation on a 25 ‰ uphill railway line, delayed valve closure upon tunnel entry and premature valve opening within tunnels significantly degrade the pressure comfort environment inside the train, resulting in ear discomfort for passengers. Hence, optimizing the logic for opening and closing pressure protection valves based on line characteristics is essential. These findings can provide valuable references for optimizing operating environments and pressure comfort in high-altitude, large-slope and multiple-tunnels lines.

{"title":"Field study on pressure fluctuations and comfort analysis when high-speed train passes through large-slope tunnels and tunnel groups","authors":"Quan Du , Yuangui Mei , Yao Ma","doi":"10.1016/j.jweia.2025.106100","DOIUrl":"10.1016/j.jweia.2025.106100","url":null,"abstract":"<div><div>High-speed trains passing through 25 ‰ sloped tunnels and tunnel groups experience complex and varying pressure environments within the tunnel. When these external pressure fluctuations are transmitted into the carriages, they alter the internal pressure environment and affect the passenger comfort. In this paper, field measurements have been used to study the influences of tunnel lengths, slopes and tunnel groups on the interior and exterior pressure variation of the train and pressure comfort. The key findings reveal that the atmospheric pressure in single-slope tunnels changes linearly with tunnel altitude at a rate of 10.21 Pa/m. External negative pressures in the uphill tunnels and external positive pressures in the downhill tunnels demonstrate a linear and positive relationship with tunnel lengths. Tunnel slopes and tunnel groups worsen the pressure comfort environments. Additionally, during actual operation on a 25 ‰ uphill railway line, delayed valve closure upon tunnel entry and premature valve opening within tunnels significantly degrade the pressure comfort environment inside the train, resulting in ear discomfort for passengers. Hence, optimizing the logic for opening and closing pressure protection valves based on line characteristics is essential. These findings can provide valuable references for optimizing operating environments and pressure comfort in high-altitude, large-slope and multiple-tunnels lines.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"262 ","pages":"Article 106100"},"PeriodicalIF":4.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on self-excited vibration and wake interference effects of flexible photovoltaic systems

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-04-07 DOI: 10.1016/j.jweia.2025.106098

Haicheng Zhang , Yang Yang , Yongfei Zhao , Mingshui Li

The issues of wind-induced vibration (WIV) are major technical bottlenecks in the development of cable-supported photovoltaic (CSPV) systems. In the present study, series of aeroelastic model wind tunnel tests of CSPV systems were conducted to analyze the WIV characteristics and wake interference effects. The WIV of the CSPV system is accompanied by significant structural nonlinearity, which causes the increase in mean response and vibration amplitude to gradually slow down with increasing wind speed. And it leads to a linear increase in the dominant frequency of vibration in the CSPV system as wind speed increases. The wake interference effect of single row changes with the wind speed. And the wake interference effect under negative AOA has a more pronounced periodic excitation effect on the rear row compared with positive AOA. In the five-rows CSPV array, the wake interference effects are more significant under positive AOA. The wake formed by first two rows induces significant bending-torsional coupling vibrations in the third row. And the wake formed by first three rows induces significant vertical vibrations in the rear rows. The wake interference effects under negative AOA primarily causes torsional vibration of the two rows behind the windward row. However, the wake formed by the first three rows causes almost no vibration in the rear row. Based on the analysis results, a ground anchor cable was proposed as a wind-resistant measure for the CSPV system, and its effectiveness was verified through experiments.

{"title":"Experimental investigation on self-excited vibration and wake interference effects of flexible photovoltaic systems","authors":"Haicheng Zhang , Yang Yang , Yongfei Zhao , Mingshui Li","doi":"10.1016/j.jweia.2025.106098","DOIUrl":"10.1016/j.jweia.2025.106098","url":null,"abstract":"<div><div>The issues of wind-induced vibration (WIV) are major technical bottlenecks in the development of cable-supported photovoltaic (CSPV) systems. In the present study, series of aeroelastic model wind tunnel tests of CSPV systems were conducted to analyze the WIV characteristics and wake interference effects. The WIV of the CSPV system is accompanied by significant structural nonlinearity, which causes the increase in mean response and vibration amplitude to gradually slow down with increasing wind speed. And it leads to a linear increase in the dominant frequency of vibration in the CSPV system as wind speed increases. The wake interference effect of single row changes with the wind speed. And the wake interference effect under negative AOA has a more pronounced periodic excitation effect on the rear row compared with positive AOA. In the five-rows CSPV array, the wake interference effects are more significant under positive AOA. The wake formed by first two rows induces significant bending-torsional coupling vibrations in the third row. And the wake formed by first three rows induces significant vertical vibrations in the rear rows. The wake interference effects under negative AOA primarily causes torsional vibration of the two rows behind the windward row. However, the wake formed by the first three rows causes almost no vibration in the <strong>rear row.</strong> Based on the analysis results, a ground anchor cable was proposed as a wind-resistant measure for the CSPV system, and its effectiveness was verified through experiments.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"262 ","pages":"Article 106098"},"PeriodicalIF":4.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digital twin-based identification of aerodynamic admittance functions of a long-span bridge

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-04-02 DOI: 10.1016/j.jweia.2025.106095

S.J. Jiang , Y.L. Xu , S.M. Li , D.H. Dan , G.Q. Zhang , C. Pei

In consideration of uncertainties involved in the aerodynamic admittance function (AAF) identification conducted in wind tunnels and structural health monitoring (SHM) systems installed in long-span bridges, a digital twin-based AAF identification method using field measurement data collected by a SHM system is proposed in this study. Firstly, a theoretical model for buffeting analysis of a long-span bridge under low wind speed conditions is introduced. Based on the measured wind speed, displacement, and acceleration data, the design document-based finite element model of the bridge is updated and the coherence functions, aerodynamic force coefficients, and damping ratios of the bridge are identified. Subsequently, based on the digital twin concept, the parameters in the AAFs of the bridge are identified using a genetic algorithm and the digital twin is established. The effects of wind turbulence on AAFs as well as the statistics of AAFs parameters are further investigated. The feasibility and accuracy of the digital twin are validated through a case study of a real long-span suspension bridge. The comparisons between the simulating results of the digital twin and the field measured data verify the efficacy of the proposed method in identifying AAFs and predicting the buffeting responses of the bridge.

{"title":"Digital twin-based identification of aerodynamic admittance functions of a long-span bridge","authors":"S.J. Jiang , Y.L. Xu , S.M. Li , D.H. Dan , G.Q. Zhang , C. Pei","doi":"10.1016/j.jweia.2025.106095","DOIUrl":"10.1016/j.jweia.2025.106095","url":null,"abstract":"<div><div>In consideration of uncertainties involved in the aerodynamic admittance function (AAF) identification conducted in wind tunnels and structural health monitoring (SHM) systems installed in long-span bridges, a digital twin-based AAF identification method using field measurement data collected by a SHM system is proposed in this study. Firstly, a theoretical model for buffeting analysis of a long-span bridge under low wind speed conditions is introduced. Based on the measured wind speed, displacement, and acceleration data, the design document-based finite element model of the bridge is updated and the coherence functions, aerodynamic force coefficients, and damping ratios of the bridge are identified. Subsequently, based on the digital twin concept, the parameters in the AAFs of the bridge are identified using a genetic algorithm and the digital twin is established. The effects of wind turbulence on AAFs as well as the statistics of AAFs parameters are further investigated. The feasibility and accuracy of the digital twin are validated through a case study of a real long-span suspension bridge. The comparisons between the simulating results of the digital twin and the field measured data verify the efficacy of the proposed method in identifying AAFs and predicting the buffeting responses of the bridge.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"262 ","pages":"Article 106095"},"PeriodicalIF":4.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transverse vibration of high-speed maglev train under dual stochastic excitations of crosswinds and maglev track irregularities

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-04-01 DOI: 10.1016/j.jweia.2025.106094

Weixu Wang , Bin Wang , Lingfeng Ma , Gang Deng , Shengde Xue

The high-speed maglev train is regarded as one of the primary directions for the future advancement of high-speed transportation systems due to its rapid velocity and environmentally friendly characteristics. Nevertheless, the transverse vibration of a high-speed maglev train is significantly challenged by the dual stochastic excitations of the crosswinds and the maglev track irregularities. In this study, a simplified numerical model for the transverse dynamics of an EMS-type high-speed maglev train is established, employing a traditional proportional-derivative (PD) controller. The improved fast stochastic analysis method based on pseudo-excitation method is utilized to solve the stochastic transverse dynamical responses. The damping matrix of the high-speed maglev train exhibits strong non-proportional characteristics as the derivative factor is relatively large. The improved fast stochastic analysis method is capable to effectively enhance the computational efficiency of the stochastic responses. The results demonstrate that the correlation between track irregularities and transverse vibrations is strong. With the increase in mean wind velocity, the stochastic response of the high-speed maglev train, which is relatively low-frequency (below the natural frequency), also increases notably. Crosswinds exceeding 15 m/s and maglev track irregularities have significant impacts on the running smoothness of the high-speed maglev train.

{"title":"Transverse vibration of high-speed maglev train under dual stochastic excitations of crosswinds and maglev track irregularities","authors":"Weixu Wang , Bin Wang , Lingfeng Ma , Gang Deng , Shengde Xue","doi":"10.1016/j.jweia.2025.106094","DOIUrl":"10.1016/j.jweia.2025.106094","url":null,"abstract":"<div><div>The high-speed maglev train is regarded as one of the primary directions for the future advancement of high-speed transportation systems due to its rapid velocity and environmentally friendly characteristics. Nevertheless, the transverse vibration of a high-speed maglev train is significantly challenged by the dual stochastic excitations of the crosswinds and the maglev track irregularities. In this study, a simplified numerical model for the transverse dynamics of an EMS-type high-speed maglev train is established, employing a traditional proportional-derivative (PD) controller. The improved fast stochastic analysis method based on pseudo-excitation method is utilized to solve the stochastic transverse dynamical responses. The damping matrix of the high-speed maglev train exhibits strong non-proportional characteristics as the derivative factor is relatively large. The improved fast stochastic analysis method is capable to effectively enhance the computational efficiency of the stochastic responses. The results demonstrate that the correlation between track irregularities and transverse vibrations is strong. With the increase in mean wind velocity, the stochastic response of the high-speed maglev train, which is relatively low-frequency (below the natural frequency), also increases notably. Crosswinds exceeding 15 m/s and maglev track irregularities have significant impacts on the running smoothness of the high-speed maglev train.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"261 ","pages":"Article 106094"},"PeriodicalIF":4.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study of dynamic wind loads on heliostats

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-03-28 DOI: 10.1016/j.jweia.2025.106092

Sahar Bakhshipour , Matthew J. Emes , Maziar Arjomandi

The fluctuating behaviour of wind load on a heliostat model at different ground clearance ratios and elevation angles under low and high turbulence flow conditions are reported in this paper. The experiments were conducted in a wind tunnel. An instrumented heliostat model contains differential pressure sensors at the front and back of the heliostat panel, which is exposed to the flow. The power spectral density of the fluctuating pressure measured by the pressure sensors was used to calculate the Strouhal number and the frequency of the wind load fluctuations on the heliostat model at different ground clearance ratios of 0.106–0.485 and different elevation angles of 15°–88°. It was observed that for elevation angles larger than 45°, the Strouhal number of the heliostat model is insensitive to flow turbulence, but at lower than 45°, it is significantly influenced by the flow turbulence parameters when the turbulence intensity at the hinge height of the heliostat is approximately 14 %. Additionally, it was shown that when the heliostat ground clearance ratio reduces, an asymmetric wake is formed in the vertical plane, and the Strouhal number increases, while for higher values of ground clearance ratio, a symmetric wake is formed and the Strouhal number stabilises at a constant value of 0.135. Increasing turbulence intensity from 2 % to 14 % leads to decrease in the Strouhal number for a ground clearance ratio of 0.333 or less. In contrast, for a ground clearance ratio of 0.409 or larger, it stays almost constant at 0.15.

{"title":"Experimental study of dynamic wind loads on heliostats","authors":"Sahar Bakhshipour , Matthew J. Emes , Maziar Arjomandi","doi":"10.1016/j.jweia.2025.106092","DOIUrl":"10.1016/j.jweia.2025.106092","url":null,"abstract":"<div><div>The fluctuating behaviour of wind load on a heliostat model at different ground clearance ratios and elevation angles under low and high turbulence flow conditions are reported in this paper. The experiments were conducted in a wind tunnel. An instrumented heliostat model contains differential pressure sensors at the front and back of the heliostat panel, which is exposed to the flow. The power spectral density of the fluctuating pressure measured by the pressure sensors was used to calculate the Strouhal number and the frequency of the wind load fluctuations on the heliostat model at different ground clearance ratios of 0.106–0.485 and different elevation angles of 15°–88°. It was observed that for elevation angles larger than 45°, the Strouhal number of the heliostat model is insensitive to flow turbulence, but at lower than 45°, it is significantly influenced by the flow turbulence parameters when the turbulence intensity at the hinge height of the heliostat is approximately 14 %. Additionally, it was shown that when the heliostat ground clearance ratio reduces, an asymmetric wake is formed in the vertical plane, and the Strouhal number increases, while for higher values of ground clearance ratio, a symmetric wake is formed and the Strouhal number stabilises at a constant value of 0.135. Increasing turbulence intensity from 2 % to 14 % leads to decrease in the Strouhal number for a ground clearance ratio of 0.333 or less. In contrast, for a ground clearance ratio of 0.409 or larger, it stays almost constant at 0.15.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"261 ","pages":"Article 106092"},"PeriodicalIF":4.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation of time-varying characteristics of snow accumulation on an arched roof under steady snowfall conditions

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-03-26 DOI: 10.1016/j.jweia.2025.106091

Xin Qiu , Qingwen Zhang , Guolong Zhang , Huamei Mo , Feng Fan

A blizzard can last for a long time. Investigating the distribution of snow on roofs helps to reduce the occurrence of snow-induced engineering disasters. Previous studies have paid little attention to the time-varying characteristics of uneven snow distribution on roofs. In order to enhance the understanding of snow distribution on roofs and predict the uneven snow cover more accurately, a method based on the Mixture model considering the evolution of the snowpack profile is proposed. The validation of this research method showed that the numerical simulation agreed well with the experimental results. The method was applied to investigate the accumulation process of snow particles on an arched roof by analyzing the relationship between the deposition and erosion of snow particles and the local bottom surface profile. The wind tunnel test, numerical simulation, and theoretical analysis indicated that under steady snowfall conditions, the snow depth does not increase indefinitely when there is partial snow cover on roof. Finally, the macro mechanism of snowpack evolution was proposed, revealing that the deposition and erosion of snow particles are processes through which the snowpack profile gradually adapts to the wind-snow flow field.

{"title":"Numerical simulation of time-varying characteristics of snow accumulation on an arched roof under steady snowfall conditions","authors":"Xin Qiu , Qingwen Zhang , Guolong Zhang , Huamei Mo , Feng Fan","doi":"10.1016/j.jweia.2025.106091","DOIUrl":"10.1016/j.jweia.2025.106091","url":null,"abstract":"<div><div>A blizzard can last for a long time. Investigating the distribution of snow on roofs helps to reduce the occurrence of snow-induced engineering disasters. Previous studies have paid little attention to the time-varying characteristics of uneven snow distribution on roofs. In order to enhance the understanding of snow distribution on roofs and predict the uneven snow cover more accurately, a method based on the Mixture model considering the evolution of the snowpack profile is proposed. The validation of this research method showed that the numerical simulation agreed well with the experimental results. The method was applied to investigate the accumulation process of snow particles on an arched roof by analyzing the relationship between the deposition and erosion of snow particles and the local bottom surface profile. The wind tunnel test, numerical simulation, and theoretical analysis indicated that under steady snowfall conditions, the snow depth does not increase indefinitely when there is partial snow cover on roof. Finally, the macro mechanism of snowpack evolution was proposed, revealing that the deposition and erosion of snow particles are processes through which the snowpack profile gradually adapts to the wind-snow flow field.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"261 ","pages":"Article 106091"},"PeriodicalIF":4.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinearity of mechanical damping of a spring-suspended sectional model system and its influence on the vortex-induced vibration response of a bridge deck 弹簧悬挂式断面模型系统机械阻尼的非线性及其对桥面涡流诱发振动响应的影响

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-03-26 DOI: 10.1016/j.jweia.2025.106088

Weimeng Ma , Zhiwen Huang , Xugang Hua , Zhengqing Chen

This paper investigates the nonlinear characteristics of additional damping provided by various damping adjustment methods or devices and the effects of nonlinear mechanical damping of spring-suspended sectional model (SSSM) systems on the vortex-induced vibration (VIV) responses of bridge decks. First, the characteristics of the additional damping provided by three commonly used damping adjustment methods, such as winding electrical tape on the coil springs, installing eddy current dampers, and tying wire rope rings on the coil springs, to the SSSM systems are studied through free vibration tests. Among these methods, the additional damping provided by tying wire rope rings has the strongest nonlinearity, and the stability of the additional damping provided by winding electrical tape is the worst. Next, based on a wake oscillator model, the effects of the nonlinearity of the structural damping on the lock-in regions and maximum VIV amplitudes of different bridge decks are analyzed. Finally, a method for defining the nominal value of the structural damping ratio is proposed, which effectively mitigates the influence of the nonlinearity of the structural damping on the prediction of the maximum VIV amplitude of a main girder, and its rationality is verified through wind tunnel tests.

{"title":"Nonlinearity of mechanical damping of a spring-suspended sectional model system and its influence on the vortex-induced vibration response of a bridge deck","authors":"Weimeng Ma , Zhiwen Huang , Xugang Hua , Zhengqing Chen","doi":"10.1016/j.jweia.2025.106088","DOIUrl":"10.1016/j.jweia.2025.106088","url":null,"abstract":"<div><div>This paper investigates the nonlinear characteristics of additional damping provided by various damping adjustment methods or devices and the effects of nonlinear mechanical damping of spring-suspended sectional model (SSSM) systems on the vortex-induced vibration (VIV) responses of bridge decks. First, the characteristics of the additional damping provided by three commonly used damping adjustment methods, such as winding electrical tape on the coil springs, installing eddy current dampers, and tying wire rope rings on the coil springs, to the SSSM systems are studied through free vibration tests. Among these methods, the additional damping provided by tying wire rope rings has the strongest nonlinearity, and the stability of the additional damping provided by winding electrical tape is the worst. Next, based on a wake oscillator model, the effects of the nonlinearity of the structural damping on the lock-in regions and maximum VIV amplitudes of different bridge decks are analyzed. Finally, a method for defining the nominal value of the structural damping ratio is proposed, which effectively mitigates the influence of the nonlinearity of the structural damping on the prediction of the maximum VIV amplitude of a main girder, and its rationality is verified through wind tunnel tests.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"261 ","pages":"Article 106088"},"PeriodicalIF":4.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CFD simulations of the wind-induced pressure distribution on double-curvature cable domes: Impact of geometrical parameters

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-03-24 DOI: 10.1016/j.jweia.2025.106087

Elshaimaa A. Ahmed , Hamid Montazeri , Ashraf A. El Damatty

Double-curvature cable domes exhibit superior stability and rigidity compared to their positive-curvature counterparts. However, their inherent flexibility and lightweight nature make them highly sensitive to wind loads. Given the absence of clear regulations in existing design codes for such innovative structures, this study aims to investigate the impact of three geometrical parameters on wind-induced mean and peak pressures on these roofs: (i) cable and strut arrangement, (ii) structure height, and (iii) saddle-shaped roof curvature. The evaluations are based on high-fidelity Scale-Adaptive Simulations (SAS) computational fluid dynamics (CFD) simulations. The results of mean pressure coefficient show minimal effect from variations in cable and strut arrangement, whereas significant sensitivity is observed in both structure height and roof curvature. Specifically, reducing the structure height from 0.4 to 0.1 of the dome span results in a 0.38 decrease in the negative wind pressure coefficient, while changing the saddle roof height from 0.25 to 0.1 of the span leads to a reduction of 1.5 in the negative wind pressure coefficient at the middle of the roof and an increase of 0.4 at the leading edge. A comparison with the design peak pressure coefficient specified in CNR-DT 207/2018 for hyperbolic-paraboloid roofs shows an underestimation of suction at several locations, with a maximum deviation of 1.5.

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引用次数: 0

A methodology towards reducing the wind return period in reinforced concrete shear walls considering reserve capacity

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-03-24 DOI: 10.1016/j.jweia.2025.106045

Mahtab Abdollahi Sarvi , Siamak Epackachi , Ali Imanpour

This paper develops a methodology to reduce the wind return period in tall reinforced concrete shear walls considering their reserve capacity. A set of 12 reinforced concrete shear walls part of an office building is selected and designed in accordance with ACI 318-19 and ASCE 7–22. Pushover analysis is then used to examine their lateral response and estimate a wind force modification factor. Wind-tunnel pressure records obtained from the Tokyo Polytechnic University aerodynamic database are utilized to evaluate through incremental dynamic wind analysis the collapse performance of the buildings designed using the standard method, and those redesigned using the proposed wind force modification factor; namely, their probability of failure under design wind load is interrogated. The results show that leveraging the reserve capacity of reinforced concrete shear walls can represent a viable alternative to the traditional elastic design method, provided that a reduced mean recurrence interval is justified for ultimate limit states. The proposed design procedure can potentially contribute to saving construction time and cost.

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