Since 2020, the CPC Central Committee and the State Council have made important plans to accelerate the construction of new infrastructure such as 5G network, big data center, artificial intelligence and industrial Internet. The State-owned Assets Supervision and Administration Commission (SASAC) issued the Notice on Accelerating the Digital Transformation of State-owned Enterprises, which points out the direction for the digital transformation of state-owned enterprises. Relying on the State Grid Tianjin Electric Power Company's Tencent No.1110kV substation as a pilot project, the project team deepened the three-dimensional design results, explored a new digital construction management mode, and developed a three-dimensional visualization system for construction control. This paper makes a detailed study on the construction ideas and system framework of the three-dimensional visualization system for power transmission and transformation engineering construction control, completes the system research and development, and applies it in the whole construction process of Tencent 110kV substation in Tianjin. Through the integration of BIM technology and data collected by the IOT sensing device, the automatic loading of professional data such as progress, quality and safety in the three-dimensional scene is realized, so as to realize full perception of operation status, full sharing of construction and management data and full coverage of process control. According to the demand of partial and sub-item settlement, with the help of the thinking mode of block chain technology, accurate settlement of project quantity and dynamic visual control of project cost are realized. And the digital transformation of power grid construction is accelerated.
{"title":"Development and application of three-dimensional visualization system for substation construction control based on “BIM+ Smart site” technology","authors":"X. Luo, Hua Mao, Feng Wang, Yongfu Li, Hangwei Ji, Hailong Meng","doi":"10.1109/ISTTCA53489.2021.9654628","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654628","url":null,"abstract":"Since 2020, the CPC Central Committee and the State Council have made important plans to accelerate the construction of new infrastructure such as 5G network, big data center, artificial intelligence and industrial Internet. The State-owned Assets Supervision and Administration Commission (SASAC) issued the Notice on Accelerating the Digital Transformation of State-owned Enterprises, which points out the direction for the digital transformation of state-owned enterprises. Relying on the State Grid Tianjin Electric Power Company's Tencent No.1110kV substation as a pilot project, the project team deepened the three-dimensional design results, explored a new digital construction management mode, and developed a three-dimensional visualization system for construction control. This paper makes a detailed study on the construction ideas and system framework of the three-dimensional visualization system for power transmission and transformation engineering construction control, completes the system research and development, and applies it in the whole construction process of Tencent 110kV substation in Tianjin. Through the integration of BIM technology and data collected by the IOT sensing device, the automatic loading of professional data such as progress, quality and safety in the three-dimensional scene is realized, so as to realize full perception of operation status, full sharing of construction and management data and full coverage of process control. According to the demand of partial and sub-item settlement, with the help of the thinking mode of block chain technology, accurate settlement of project quantity and dynamic visual control of project cost are realized. And the digital transformation of power grid construction is accelerated.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129011364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654775
Guanghua Chen, Jinxi Zhang
The driving vibration caused by the pavement roughness is an important factor affecting the driving comfort, and the driving vibration is speed-dependent, so there are some deficiencies in the method of reflecting the driving feeling only by the pavement roughness index. Small smart devices represented by smartphone can detect vibration and speed. In order to provide a new reference method for pavement driving comfort evaluation, Honda-CRV and smartphone were used as the experimental vehicle and data collection equipment. Driving experiments were carried out on several ordinary asphalt pavement sections with different smoothness, and the driving vibration and speed data were obtained by experiment phone. Taking the vector synthetic vibration acceleration as the vibration index, a new index for pavement driving comfort evaluation -- comfort rate (CR) was put forward from the point of view of the time of road section driving vibration process. The CRs of different experiment sections were calculated, the relationship between CR and riding quality index (RQI) was analyzed, the feasibility of using CR as the evaluation index of driving comfort was discussed. Finally, according to the CR distribution range of the experimental sections and the meaning of CR, the CR rating method for driving comfort evaluation was proposed, which provided a new way to evaluate the driving comfort with driving intelligent perception data.
{"title":"A Driving Comfort Evaluation Method Based on Smartphone Testing Data","authors":"Guanghua Chen, Jinxi Zhang","doi":"10.1109/ISTTCA53489.2021.9654775","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654775","url":null,"abstract":"The driving vibration caused by the pavement roughness is an important factor affecting the driving comfort, and the driving vibration is speed-dependent, so there are some deficiencies in the method of reflecting the driving feeling only by the pavement roughness index. Small smart devices represented by smartphone can detect vibration and speed. In order to provide a new reference method for pavement driving comfort evaluation, Honda-CRV and smartphone were used as the experimental vehicle and data collection equipment. Driving experiments were carried out on several ordinary asphalt pavement sections with different smoothness, and the driving vibration and speed data were obtained by experiment phone. Taking the vector synthetic vibration acceleration as the vibration index, a new index for pavement driving comfort evaluation -- comfort rate (CR) was put forward from the point of view of the time of road section driving vibration process. The CRs of different experiment sections were calculated, the relationship between CR and riding quality index (RQI) was analyzed, the feasibility of using CR as the evaluation index of driving comfort was discussed. Finally, according to the CR distribution range of the experimental sections and the meaning of CR, the CR rating method for driving comfort evaluation was proposed, which provided a new way to evaluate the driving comfort with driving intelligent perception data.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127774005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654700
Moyu Pan, Xubin Huang, Zhe Miao, S. Di, Xi Lu
Based on double yield surface model, the deformation and stress states of key parts of high concrete faced sandy gravel dam at Chahanwusu, Xinjiang are calculated and analyzed. The results show that the law of the calculated results is consistent with measured results on the whole. The settlement of dam accounts for 0.54 % of dam height, and the ratio of overburden layer settlement to its thickness is 0.75%. The panels and diaphragm wall are mainly subjected to compression, with a small range of tension. This paper can provide guidance for the construction and design of extra high or high faced sandy gravel dam on deep overburden layer.
{"title":"Stress and deformation analysis of high concrete faced sandy gravel dam on deep overburden layer","authors":"Moyu Pan, Xubin Huang, Zhe Miao, S. Di, Xi Lu","doi":"10.1109/ISTTCA53489.2021.9654700","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654700","url":null,"abstract":"Based on double yield surface model, the deformation and stress states of key parts of high concrete faced sandy gravel dam at Chahanwusu, Xinjiang are calculated and analyzed. The results show that the law of the calculated results is consistent with measured results on the whole. The settlement of dam accounts for 0.54 % of dam height, and the ratio of overburden layer settlement to its thickness is 0.75%. The panels and diaphragm wall are mainly subjected to compression, with a small range of tension. This paper can provide guidance for the construction and design of extra high or high faced sandy gravel dam on deep overburden layer.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127895477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654623
Yuchi Liu
Bridges play a more and more important role in human society. For this reason, the structural safety of the bridge needs to be highly valued. The traditional structural health monitoring technology can continuously and regularly measure the key structural and environmental parameters of the bridge, so as to avoid casualties. However, with the increasing complexity of bridge design structure, more comprehensive information needs to be collected and measured. Structure Health Monitoring (SHM) technology combined with Global Positioning System (GPS) came into being. This paper briefly expounds the principle of GPS positioning, and also introduces some cases of using this technology. The problem of excessive observation noise and the effect of using Chinese Beidou navigation is also discussed. At the same time, the paper also points out the problem of excessive observation noise and that the observation accuracy and radio anti interference ability should be improved in the future
{"title":"Research on Bridge Structure Health Monitoring Based on GPS","authors":"Yuchi Liu","doi":"10.1109/ISTTCA53489.2021.9654623","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654623","url":null,"abstract":"Bridges play a more and more important role in human society. For this reason, the structural safety of the bridge needs to be highly valued. The traditional structural health monitoring technology can continuously and regularly measure the key structural and environmental parameters of the bridge, so as to avoid casualties. However, with the increasing complexity of bridge design structure, more comprehensive information needs to be collected and measured. Structure Health Monitoring (SHM) technology combined with Global Positioning System (GPS) came into being. This paper briefly expounds the principle of GPS positioning, and also introduces some cases of using this technology. The problem of excessive observation noise and the effect of using Chinese Beidou navigation is also discussed. At the same time, the paper also points out the problem of excessive observation noise and that the observation accuracy and radio anti interference ability should be improved in the future","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124551333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654446
Jiarui Zhang, Dongliang Geng, Fei Guo, Zhibo Yang, Juan Shi
As the level of automation of autonomous vehicles continues to increase, it is becoming more and more important to study the behavior characteristics of drivers to optimize the behavioral characteristics of autonomous vehicles. In order to study the characteristics of driver overtaking behavior, this study convened 5 testers to carry out a 2×3 in-test design experiment based on a six degrees-of-freedom (DoF) driving simulator. The time-to-collision (TTC), the longitudinal distance between two vehicles, and the steering wheel angle at the begin time of the overtaking behavior are taken as the analysis indicators to characterize the behavior characteristics of the driver. The result shows that the different speeds of the vehicle have no statistically significant effects on the behavior characteristics of the driver (TTC, $mathbf{P}{=0.187 > 0.05;}$ Longitudinal distance, $mathbf{P}{=0.682 > 0.05;}$ Steering Angle, $mathbf{P}{=0.052 > 0.05).}$ The speed difference will significantly affect the values of the above three indicators. A larger speed difference will result in a smaller TTC and a larger distance between the two vehicles and the steering wheel angle. This paper can provide theoretical support for designing driving strategies with more human behavior characteristics.
{"title":"Research On Influencing Factors of Overtaking Behavior Based On Six-Degrees-Of-Freedom Driving Simulator","authors":"Jiarui Zhang, Dongliang Geng, Fei Guo, Zhibo Yang, Juan Shi","doi":"10.1109/ISTTCA53489.2021.9654446","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654446","url":null,"abstract":"As the level of automation of autonomous vehicles continues to increase, it is becoming more and more important to study the behavior characteristics of drivers to optimize the behavioral characteristics of autonomous vehicles. In order to study the characteristics of driver overtaking behavior, this study convened 5 testers to carry out a 2×3 in-test design experiment based on a six degrees-of-freedom (DoF) driving simulator. The time-to-collision (TTC), the longitudinal distance between two vehicles, and the steering wheel angle at the begin time of the overtaking behavior are taken as the analysis indicators to characterize the behavior characteristics of the driver. The result shows that the different speeds of the vehicle have no statistically significant effects on the behavior characteristics of the driver (TTC, $mathbf{P}{=0.187 > 0.05;}$ Longitudinal distance, $mathbf{P}{=0.682 > 0.05;}$ Steering Angle, $mathbf{P}{=0.052 > 0.05).}$ The speed difference will significantly affect the values of the above three indicators. A larger speed difference will result in a smaller TTC and a larger distance between the two vehicles and the steering wheel angle. This paper can provide theoretical support for designing driving strategies with more human behavior characteristics.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126998516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654434
Junqi Liang, X. He
This paper explores the issue of emergency transportation routes for coal. The main factors influencing the transportation of coal are taken into account, including transport time, transport costs, and the additional time and costs required for transit transport. The two primary modes of transport for coal are road transport and rail transport, considering unfavorable factors such as the excessive time consumed by waterway transport. In this paper, a coal emergency transport path optimization model is constructed. Moreover, this paper applies a hybrid algorithm of Dijkstra and genetic-simulated annealing to solve the coal transport path model, with minimum time and minimum cost as the objective function. A few transport routes with short paths are initially obtained by Dijkstra's algorithm, and these routes are used as input paths for the genetic-simulated annealing algorithm. Based on this hybrid algorithm, the optimal combination of transport modes is generated by combining population crossover and mutation. The hybrid algorithm can find the exact transport method relatively quickly.
{"title":"Optimization of Coal Transportation Path Based on Dijkstra and Genetic-Simulated Annealing Algorithm","authors":"Junqi Liang, X. He","doi":"10.1109/ISTTCA53489.2021.9654434","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654434","url":null,"abstract":"This paper explores the issue of emergency transportation routes for coal. The main factors influencing the transportation of coal are taken into account, including transport time, transport costs, and the additional time and costs required for transit transport. The two primary modes of transport for coal are road transport and rail transport, considering unfavorable factors such as the excessive time consumed by waterway transport. In this paper, a coal emergency transport path optimization model is constructed. Moreover, this paper applies a hybrid algorithm of Dijkstra and genetic-simulated annealing to solve the coal transport path model, with minimum time and minimum cost as the objective function. A few transport routes with short paths are initially obtained by Dijkstra's algorithm, and these routes are used as input paths for the genetic-simulated annealing algorithm. Based on this hybrid algorithm, the optimal combination of transport modes is generated by combining population crossover and mutation. The hybrid algorithm can find the exact transport method relatively quickly.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125174175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654503
X. Kong, Shuai Liu, Ke Wang, Jie Fang, Shizhong He, Peng-cheng Liu
With the exploitation of coal resources in Western China, the local water shortage and loss are becoming more and more serious. In order to protect water resources, coal mine underground reservoirs came into being. As the main part of underground reservoir in coal mine, the stability of artificial dam is of great significance. The dam thickness is a key parameter of the artificial dam, which is closely related to stability of the dam. Taking Wulanmulun mine as the engineering background, the artificial dam model is established by FLAC3D software. The mechanical response and deformation law of the dam under different thickness are analyzed from three aspects of displacement, stress and plastic zone. The results show that the increase of dam thickness can reduce the displacement and stress level of dam and groove, and reduce the distribution of plastic zone. In comprehensive consideration, the thickness of the artificial dam can be increased to 1.4m to improve the stability of the dam.
{"title":"Study on Artificial Dam Thickness of Underground Reservoir in Wulanmulun Mine","authors":"X. Kong, Shuai Liu, Ke Wang, Jie Fang, Shizhong He, Peng-cheng Liu","doi":"10.1109/ISTTCA53489.2021.9654503","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654503","url":null,"abstract":"With the exploitation of coal resources in Western China, the local water shortage and loss are becoming more and more serious. In order to protect water resources, coal mine underground reservoirs came into being. As the main part of underground reservoir in coal mine, the stability of artificial dam is of great significance. The dam thickness is a key parameter of the artificial dam, which is closely related to stability of the dam. Taking Wulanmulun mine as the engineering background, the artificial dam model is established by FLAC3D software. The mechanical response and deformation law of the dam under different thickness are analyzed from three aspects of displacement, stress and plastic zone. The results show that the increase of dam thickness can reduce the displacement and stress level of dam and groove, and reduce the distribution of plastic zone. In comprehensive consideration, the thickness of the artificial dam can be increased to 1.4m to improve the stability of the dam.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128444983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654586
Meng Lian, Bo Liu, Jing Luo
Aiming at the problems of complicated traffic flow and high accident safety risks in the expressway merging area, considering the discrete and heterogeneous characteristics of traffic conflict data, a Poisson-lognormal distribution model (PLN) and the random parameters Poisson-lognormal traffic conflict model (RP-PLN) were developed; The posterior distributions of the models parameters were estimated by Bayesian method and the Markov chain Monte Carlo (MCMC) simulation. The goodness-of-fit of models were compared by using the deviance information criterion. The results show that the goodness of fit of the random parameters Poisson-lognormal traffic conflict model (RP-PLN) is higher than that of the Poisson-lognormal distribution t model (PLN).
{"title":"Prediction of Traffic Conflict in Freeway Merging Area Based on Bayesian Model","authors":"Meng Lian, Bo Liu, Jing Luo","doi":"10.1109/ISTTCA53489.2021.9654586","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654586","url":null,"abstract":"Aiming at the problems of complicated traffic flow and high accident safety risks in the expressway merging area, considering the discrete and heterogeneous characteristics of traffic conflict data, a Poisson-lognormal distribution model (PLN) and the random parameters Poisson-lognormal traffic conflict model (RP-PLN) were developed; The posterior distributions of the models parameters were estimated by Bayesian method and the Markov chain Monte Carlo (MCMC) simulation. The goodness-of-fit of models were compared by using the deviance information criterion. The results show that the goodness of fit of the random parameters Poisson-lognormal traffic conflict model (RP-PLN) is higher than that of the Poisson-lognormal distribution t model (PLN).","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130379630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to improve the protective performance of the temporary movable steel guardrail used in the reconstruction and expansion of expressway, according to the application scenario of the movable steel guardrail, the maximum lateral displacement in the process of vehicle collision guardrail was taken as one of the constraints of the model, and the anchorage distance and steel plate thickness of the guardrail were established as the design variables. A multi-objective optimization model was proposed to minimize the vehicle centroid acceleration and maximize the distance between the vehicle and the right edge of the steering exit frame. According to the actual vehicle crash test, the automobile finite model and the movable steel guardrail finite element model are designed to meet the current safety performance evaluation standards and collision accuracy. Furthermore, a simulation test of vehicle collision with guardrail was designed including 25 test sample points, and the simulation results were fitted with the constructed RBF model. Based on the fitting results, the optimized model was solved by the designed genetic algorithm, and the Pareto solution set was obtained. The optimization results show that with the lateral displacement is less than 2m, the acceleration of the vehicle's center of mass is reduced and the distance between the vehicle and the right-side line of the guide exit frame is increased by reducing the anchorage spacing and increasing the steel plate thickness of the guardrail, which improves the protective effect of the guardrail and provides a certain reference for engineering application.
{"title":"Study on Optimizing Installation Technology of Movable Steel Guardrails in Reconstruction and Expansion Projects of Expressways","authors":"Wanli Tian, Zhongguang Wu, Shuo Pan, Jing Chen, Zhenhu Zhang","doi":"10.1109/ISTTCA53489.2021.9654563","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654563","url":null,"abstract":"In order to improve the protective performance of the temporary movable steel guardrail used in the reconstruction and expansion of expressway, according to the application scenario of the movable steel guardrail, the maximum lateral displacement in the process of vehicle collision guardrail was taken as one of the constraints of the model, and the anchorage distance and steel plate thickness of the guardrail were established as the design variables. A multi-objective optimization model was proposed to minimize the vehicle centroid acceleration and maximize the distance between the vehicle and the right edge of the steering exit frame. According to the actual vehicle crash test, the automobile finite model and the movable steel guardrail finite element model are designed to meet the current safety performance evaluation standards and collision accuracy. Furthermore, a simulation test of vehicle collision with guardrail was designed including 25 test sample points, and the simulation results were fitted with the constructed RBF model. Based on the fitting results, the optimized model was solved by the designed genetic algorithm, and the Pareto solution set was obtained. The optimization results show that with the lateral displacement is less than 2m, the acceleration of the vehicle's center of mass is reduced and the distance between the vehicle and the right-side line of the guide exit frame is increased by reducing the anchorage spacing and increasing the steel plate thickness of the guardrail, which improves the protective effect of the guardrail and provides a certain reference for engineering application.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128022879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654616
Peibin Li, Songhong Yan, Y. Wang, Hui Zhu, Mingxing Cao, Yuxiang Li
In the ASEISMIC analysis of tunnel passing through fault fracture zone, the influence of earthquake input direction should be considered. The tunnel passing through fault fracture zone of Shantou railway is modeled by ABAQUS simulation software, the reflection superposition effect at the boundary is eliminated by using the infinite element transmission boundary. The dynamic response of the lining in the fault zone of the tunnel under different seismic input directions is analyzed and compared. The results show that: 1 The acceleration response of the tunnel structure is amplified by the fault fracture zone, when the seismic acceleration is input along the tunnel transverse, longitudinal and vertical direction respectively, the acceleration response of the lining in the fracture zone is amplified by 1.127,1.157 and 1.391, respectively. The maximum displacement appears at the top of the arch, the maximum displacement occurs at the vertical input, the next is at the transverse input, and the minimum is at the longitudinal input. 3 The maximum stress occurred at the vault, spandrel and arch foot of the section at the fault interface.
{"title":"Dynamic response of the input direction of ground motion to the fault section of large cross-section tunnel","authors":"Peibin Li, Songhong Yan, Y. Wang, Hui Zhu, Mingxing Cao, Yuxiang Li","doi":"10.1109/ISTTCA53489.2021.9654616","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654616","url":null,"abstract":"In the ASEISMIC analysis of tunnel passing through fault fracture zone, the influence of earthquake input direction should be considered. The tunnel passing through fault fracture zone of Shantou railway is modeled by ABAQUS simulation software, the reflection superposition effect at the boundary is eliminated by using the infinite element transmission boundary. The dynamic response of the lining in the fault zone of the tunnel under different seismic input directions is analyzed and compared. The results show that: 1 The acceleration response of the tunnel structure is amplified by the fault fracture zone, when the seismic acceleration is input along the tunnel transverse, longitudinal and vertical direction respectively, the acceleration response of the lining in the fracture zone is amplified by 1.127,1.157 and 1.391, respectively. The maximum displacement appears at the top of the arch, the maximum displacement occurs at the vertical input, the next is at the transverse input, and the minimum is at the longitudinal input. 3 The maximum stress occurred at the vault, spandrel and arch foot of the section at the fault interface.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133512330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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