Pub Date : 2021-11-12DOI: 10.1109/ISTTCA53489.2021.9654732
Qun Wang
To address the problem of low accuracy of test results in the current testing method of seismic performance for concrete-structure buildings, this paper proposes a new testing method, in which a family of functions would be obtained by using the telescopic translation operations of wavelet functions, and wavelet transform would be performed on the simulated seismic signals; when the family of functions is composed of a standard orthogonal basis, the seismic signals would be reconstructed from the continuous wavelet transforms, and the denoised seismic signals would serve as the signal samples for testing the seismic performance of concrete-structure buildings, with the dynamic equilibrium equation of single-degree-of-freedom system used to solve the displacement response, velocity response, acceleration response and recovery force of the earthquakes. Then the calculation formula for the strength reduction factor and the maximum elastic response of the structure(s) would be adopted to calculate both the strength reduction factor and the maximum elastic response of the concrete-structure buildings to realize the seismic performance test of the concrete-structure buildings. The results of the test experiments demonstrate that the proposed method can be used to test the seismic performance of concrete buildings with a high degree of accuracy.
{"title":"Seismic Performance Test of Concrete-structure Buildings","authors":"Qun Wang","doi":"10.1109/ISTTCA53489.2021.9654732","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654732","url":null,"abstract":"To address the problem of low accuracy of test results in the current testing method of seismic performance for concrete-structure buildings, this paper proposes a new testing method, in which a family of functions would be obtained by using the telescopic translation operations of wavelet functions, and wavelet transform would be performed on the simulated seismic signals; when the family of functions is composed of a standard orthogonal basis, the seismic signals would be reconstructed from the continuous wavelet transforms, and the denoised seismic signals would serve as the signal samples for testing the seismic performance of concrete-structure buildings, with the dynamic equilibrium equation of single-degree-of-freedom system used to solve the displacement response, velocity response, acceleration response and recovery force of the earthquakes. Then the calculation formula for the strength reduction factor and the maximum elastic response of the structure(s) would be adopted to calculate both the strength reduction factor and the maximum elastic response of the concrete-structure buildings to realize the seismic performance test of the concrete-structure buildings. The results of the test experiments demonstrate that the proposed method can be used to test the seismic performance of concrete buildings with a high degree of accuracy.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"361 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":"134262247","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/ISTTCA53489.2021.9654513
Jingxian Shi
To explore the bearing capacity of reinforced arch bridge bents, the original 3# framed bent of a 130 m arch bridge were reinforced by applying the fiber reinforced plastic (FRP), enlarging section and using steel plates. Next, the Pushover analysis was performed for bent piers through the displacement-based pushover method. Finally, the plastic deformation and ultimate thrust force of this bridge were calculated via Midas Civil. The results revealed that in the transverse direction of this bridge, the mean ultimate horizontal thrust force of upright columns was 427.9 kN, and their ultimate horizontal thrust force was elevated by 1.47% after using FRP, by 47.57% after embedding steel bars, and 66.62% after using steel plates. In the direction along this bridge, the mean ultimate horizontal thrust force of the stand columns was 460.3 kN, which was increased to 472.3 kN after using FRP, to 547.2 kN after planting steel bars and to 673.7 kN after using steel plates. The Pushover analysis method, which can truly reflect the failure process of bridge piers under quasi-static loads, serves as a basis for the earthquake-proof reinforcement analysis of framed bent piers. The ultimate bearing capacity of stand column nodes was evidently improved after being reinforced by using steel plates and enlarging sections.
{"title":"Research on Bearing Capacity of Reinforced Arch Bridge Bents Based on Pushover Analysis","authors":"Jingxian Shi","doi":"10.1109/ISTTCA53489.2021.9654513","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654513","url":null,"abstract":"To explore the bearing capacity of reinforced arch bridge bents, the original 3# framed bent of a 130 m arch bridge were reinforced by applying the fiber reinforced plastic (FRP), enlarging section and using steel plates. Next, the Pushover analysis was performed for bent piers through the displacement-based pushover method. Finally, the plastic deformation and ultimate thrust force of this bridge were calculated via Midas Civil. The results revealed that in the transverse direction of this bridge, the mean ultimate horizontal thrust force of upright columns was 427.9 kN, and their ultimate horizontal thrust force was elevated by 1.47% after using FRP, by 47.57% after embedding steel bars, and 66.62% after using steel plates. In the direction along this bridge, the mean ultimate horizontal thrust force of the stand columns was 460.3 kN, which was increased to 472.3 kN after using FRP, to 547.2 kN after planting steel bars and to 673.7 kN after using steel plates. The Pushover analysis method, which can truly reflect the failure process of bridge piers under quasi-static loads, serves as a basis for the earthquake-proof reinforcement analysis of framed bent piers. The ultimate bearing capacity of stand column nodes was evidently improved after being reinforced by using steel plates and enlarging sections.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"79 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":"132489093","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/ISTTCA53489.2021.9654449
Yan Peng, Jianzhi Yang
In this paper, theoretical analysis and mathematical simulation are used to explore the physical mechanism of a flying frisbee. First, computational fluid dynamics (CFD) studies were conducted to explore the flow characteristics around a flying frisbee. Second, by analyzing the forces acted on the frisbee and deriving the governing equations describing the movement of the frisbee, a numerical algorithm which can quickly evaluate the trajectory of a flying frisbee was developed. The effects of the testing parameters on the behavior of the frisbee movements were investigated, and the optimal control parameters were discussed. Third, A Graphical-user-interface was developed and thus the algorithm can be easily used by public. The results of this study can provide theoretical evidence for the optimal design and setting for the frisbee.
{"title":"Computational Fluid Dynamics Study of A Flying Frisbee","authors":"Yan Peng, Jianzhi Yang","doi":"10.1109/ISTTCA53489.2021.9654449","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654449","url":null,"abstract":"In this paper, theoretical analysis and mathematical simulation are used to explore the physical mechanism of a flying frisbee. First, computational fluid dynamics (CFD) studies were conducted to explore the flow characteristics around a flying frisbee. Second, by analyzing the forces acted on the frisbee and deriving the governing equations describing the movement of the frisbee, a numerical algorithm which can quickly evaluate the trajectory of a flying frisbee was developed. The effects of the testing parameters on the behavior of the frisbee movements were investigated, and the optimal control parameters were discussed. Third, A Graphical-user-interface was developed and thus the algorithm can be easily used by public. The results of this study can provide theoretical evidence for the optimal design and setting for the frisbee.","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":"132996153","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/ISTTCA53489.2021.9654593
J. Cai
In recent years, under the rapid growth of the world's population rate, and limitations of living areas brought by limited land resources; the future trend of society's developments in the building construction industry will be dedicated to the construction of higher buildings. Wind load is one of the major components taken into serious consideration during the building construction process. The potential impacts that wind load can bring to structures include causing the building to experience lateral deformation, and vibration, especially for the taller building. To prevent the building from experience deformation and collapse, engineers have discovered calculation procedures to estimate the potential wind loads that would be applied to the buildings to improve the stability and safety level. In this paper, I broke down formulas from two famous wind loads determination methods including the ASCE 7 wind load determination method and wind load determination method through Load Code for the Design of Building Structures to find the more conservative method while providing a higher level of safety insurance under the wind loads condition. The study I have reviewed showed that the wind load determination method through Load Code for the Design of Building Structures is overall a well-developed method that can be widely used in calculating wind loads applied to the building; this method can provide a high safety level for building resistance toward wind loads. ASCE 7 wind load determination method is also a reliable way for wind loads calculation, but there are still some rooms for improvement.
{"title":"Wind Effects and Wind Load Factors in the Design of Rectangular Plane shape Buildings","authors":"J. Cai","doi":"10.1109/ISTTCA53489.2021.9654593","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654593","url":null,"abstract":"In recent years, under the rapid growth of the world's population rate, and limitations of living areas brought by limited land resources; the future trend of society's developments in the building construction industry will be dedicated to the construction of higher buildings. Wind load is one of the major components taken into serious consideration during the building construction process. The potential impacts that wind load can bring to structures include causing the building to experience lateral deformation, and vibration, especially for the taller building. To prevent the building from experience deformation and collapse, engineers have discovered calculation procedures to estimate the potential wind loads that would be applied to the buildings to improve the stability and safety level. In this paper, I broke down formulas from two famous wind loads determination methods including the ASCE 7 wind load determination method and wind load determination method through Load Code for the Design of Building Structures to find the more conservative method while providing a higher level of safety insurance under the wind loads condition. The study I have reviewed showed that the wind load determination method through Load Code for the Design of Building Structures is overall a well-developed method that can be widely used in calculating wind loads applied to the building; this method can provide a high safety level for building resistance toward wind loads. ASCE 7 wind load determination method is also a reliable way for wind loads calculation, but there are still some rooms for improvement.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"5 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":"133313732","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/ISTTCA53489.2021.9654552
B. Duan, Lipeng Gu, Hui Li, Wei Hou
In recent years, a large number of transportation facilities have been constructed in my country, and urban subway projects have gradually increased. The rise of urban subways has effectively alleviated ground traffic congestion, but at the same time it is bound to go under ground buildings. In the process of tunnel construction, it is necessary to ensure the safety of the tunnel, but also to consider the safety and use of ground buildings. In order to study the vibration response analysis of the frame structure under tunnel blasting, the Qingdao Metro Line 1 was taken as the research object, combined with the actual working conditions, and the MIDAS GTS NX finite element software was used for numerical simulation analysis, and the following conclusions were drawn: (1) Due to the frame structure The vibration velocity in the vertical direction is greater than that in the horizontal direction, so the vertical direction of the measuring point is taken as the key research object. A high-rise amplification effect has begun to appear on the 7th floor, and the protection of the middle layer and the top layer should be strengthened during blasting construction. (2) The buried depth of the tunnel is an important factor that affects the vibration response of the tunnel blasting to the frame structure building. When the buried depth of the tunnel is 20m, the vibration speed is close to the maximum range required by the “Blasting Safety Regulations”. Some parameters need to be changed appropriately to make the vibration speed suitable. When the buried depth of the tunnel is 25 m and 30 m, the influence of the buried depth of the tunnel on the vibration velocity is already small.
{"title":"Analysis of Vibration Response of Frame Building under Tunnel Blasting Load","authors":"B. Duan, Lipeng Gu, Hui Li, Wei Hou","doi":"10.1109/ISTTCA53489.2021.9654552","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654552","url":null,"abstract":"In recent years, a large number of transportation facilities have been constructed in my country, and urban subway projects have gradually increased. The rise of urban subways has effectively alleviated ground traffic congestion, but at the same time it is bound to go under ground buildings. In the process of tunnel construction, it is necessary to ensure the safety of the tunnel, but also to consider the safety and use of ground buildings. In order to study the vibration response analysis of the frame structure under tunnel blasting, the Qingdao Metro Line 1 was taken as the research object, combined with the actual working conditions, and the MIDAS GTS NX finite element software was used for numerical simulation analysis, and the following conclusions were drawn: (1) Due to the frame structure The vibration velocity in the vertical direction is greater than that in the horizontal direction, so the vertical direction of the measuring point is taken as the key research object. A high-rise amplification effect has begun to appear on the 7th floor, and the protection of the middle layer and the top layer should be strengthened during blasting construction. (2) The buried depth of the tunnel is an important factor that affects the vibration response of the tunnel blasting to the frame structure building. When the buried depth of the tunnel is 20m, the vibration speed is close to the maximum range required by the “Blasting Safety Regulations”. Some parameters need to be changed appropriately to make the vibration speed suitable. When the buried depth of the tunnel is 25 m and 30 m, the influence of the buried depth of the tunnel on the vibration velocity is already small.","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":"131162429","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/ISTTCA53489.2021.9654591
Xiaokun Han, Rui Wang, Luwan Wang, Wenying Su
Facing the requirement of rapidity in traffic engineering inspection, vehicle-mounted marking retroreflective measuring instrument(VMRMI) replaces traditional portable marking retroreflective measuring instrument and has been widely used. VMRMI follows the traditional measurement principle, but the factors that affect measurement accuracy are increasing. In order to effectively improve its measurement accuracy, an analysis of the factors affecting the measurement accuracy has been carried out, and an experimental study on the effect of four factors such as the longitudinal inclination of the vehicle has been conducted.
{"title":"Research on Measurement Accuracy of Vehicle-Mounted Marking Retroreflective Measuring Instrument","authors":"Xiaokun Han, Rui Wang, Luwan Wang, Wenying Su","doi":"10.1109/ISTTCA53489.2021.9654591","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654591","url":null,"abstract":"Facing the requirement of rapidity in traffic engineering inspection, vehicle-mounted marking retroreflective measuring instrument(VMRMI) replaces traditional portable marking retroreflective measuring instrument and has been widely used. VMRMI follows the traditional measurement principle, but the factors that affect measurement accuracy are increasing. In order to effectively improve its measurement accuracy, an analysis of the factors affecting the measurement accuracy has been carried out, and an experimental study on the effect of four factors such as the longitudinal inclination of the vehicle has been conducted.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"290 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":"133671763","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/ISTTCA53489.2021.9654769
Baojun Qin, Shaolin Chen, Z. Ye
Based on the self-designed experimental device, slurry infiltration tests in different strata and pressures were carried out. The influence of slurry parameters on the film formation effect was analyzed with the water filtration quantity as the index of evaluation, and the control index suitable for the field engineering was proposed. The results show that, for formation process with high permeability and larger average pore size, it takes longer to form filter cake, and the stability of the filter cake is better; to obtain a stable filter cake on the surface of a high permeability stratum, particle size distribution and gravity matching with the stratum need to be chosen when preparing the slurry to ensure the content of particles entering the pores of the stratum. At the same time, viscosity-increasing components were added to increase the viscosity, which significantly enhances the binding force between the slurry and the particles and improving the stability of the filter cake; Water filtration quantity ratio above 0.6 can form a high-quality slurry film. Considering the actual construction efficiency, it is recommended that the ratio was controlled at 0.4~0.6.
{"title":"Formation law and quality evaluation of slurry permeability membrane in high permeability formation","authors":"Baojun Qin, Shaolin Chen, Z. Ye","doi":"10.1109/ISTTCA53489.2021.9654769","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654769","url":null,"abstract":"Based on the self-designed experimental device, slurry infiltration tests in different strata and pressures were carried out. The influence of slurry parameters on the film formation effect was analyzed with the water filtration quantity as the index of evaluation, and the control index suitable for the field engineering was proposed. The results show that, for formation process with high permeability and larger average pore size, it takes longer to form filter cake, and the stability of the filter cake is better; to obtain a stable filter cake on the surface of a high permeability stratum, particle size distribution and gravity matching with the stratum need to be chosen when preparing the slurry to ensure the content of particles entering the pores of the stratum. At the same time, viscosity-increasing components were added to increase the viscosity, which significantly enhances the binding force between the slurry and the particles and improving the stability of the filter cake; Water filtration quantity ratio above 0.6 can form a high-quality slurry film. Considering the actual construction efficiency, it is recommended that the ratio was controlled at 0.4~0.6.","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":"131022256","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/ISTTCA53489.2021.9654699
Yanlei Li, Yan Gao, Jingrui Liu, Yanteng Li, Jingquan Miao, Jinsheng Qi, Fengjun Ji
Multi-energy complementary heating technology can improve the instability and the operating efficiency of the heating system. The representative solar coupled heat pump system is widely used in northern residents for heating, which is of great significance to improve the northern haze environment and energy saving and emission reduction. In order to further improve the level of clean energy application and obtain an efficient and stable multi-energy complementary heating system, this article combined the characteristics of solar photovoltaic thermal collectors (Photo-voltaic/thermal, PV/T) and heat pumps. The PV/T-based multi-energy complementary heating system was proposed, the system was a PV/T coupled water source heat pump and ground source heat pump. The PV/T collector applied the waste heat recovery of photovoltaic panels to the evaporation end of the water source heat pump, and the ground source heat pump served as an auxiliary heat source for heating. Taking an office building as an example, the system design selection was carried out, and the system operation experiment platform and operation simulation model were built to optimize the connection mode, operation plan and design selection of the system, which provided a reference for the feasibility study of the system in the northern cold regions.
{"title":"Performance Analysis of Multi-energy Complementary Heating System Based on Photo-voltaic/thermal collectors and Heat Pumps","authors":"Yanlei Li, Yan Gao, Jingrui Liu, Yanteng Li, Jingquan Miao, Jinsheng Qi, Fengjun Ji","doi":"10.1109/ISTTCA53489.2021.9654699","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654699","url":null,"abstract":"Multi-energy complementary heating technology can improve the instability and the operating efficiency of the heating system. The representative solar coupled heat pump system is widely used in northern residents for heating, which is of great significance to improve the northern haze environment and energy saving and emission reduction. In order to further improve the level of clean energy application and obtain an efficient and stable multi-energy complementary heating system, this article combined the characteristics of solar photovoltaic thermal collectors (Photo-voltaic/thermal, PV/T) and heat pumps. The PV/T-based multi-energy complementary heating system was proposed, the system was a PV/T coupled water source heat pump and ground source heat pump. The PV/T collector applied the waste heat recovery of photovoltaic panels to the evaporation end of the water source heat pump, and the ground source heat pump served as an auxiliary heat source for heating. Taking an office building as an example, the system design selection was carried out, and the system operation experiment platform and operation simulation model were built to optimize the connection mode, operation plan and design selection of the system, which provided a reference for the feasibility study of the system in the northern cold regions.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"36 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":"123979046","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/ISTTCA53489.2021.9654694
C. Liu
In view of the serious pollution of municipal engineering concrete, the anti-pollution concrete is prepared with nano-TiO2, the influence of nano-TiO2 on the working and mechanical properties of concrete is studied, and the influence of $mathbf{nano}-mathbf{TiO}_{2}$ on the anti-pollution performance of concrete is standardized by testing the growth of algae, The conclusions are as follows: the concrete that meets the construction requirements can be prepared after adding $mathbf{nano}-mathbf{TiO}_{2}$. However, because the particle size of $mathbf{nano}-mathbf{TiO}_{2}$ is very small, it needs to absorb more mixing water, resulting in the reduction of concrete working performance and the need to greatly increase the amount of admixture; with the increase of $mathbf{nano}-mathbf{TiO}_{2}$ content, the compressive strength of concrete at all ages is improved, the relative value of concrete fluorescence is significantly decreased, and the anti-pollution ability of concrete is improved; the most serious part of concrete biological pollution is the dry wet cycle area.
{"title":"Effect of nano titanium dioxide on anti-fouling performance of concrete","authors":"C. Liu","doi":"10.1109/ISTTCA53489.2021.9654694","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654694","url":null,"abstract":"In view of the serious pollution of municipal engineering concrete, the anti-pollution concrete is prepared with nano-TiO2, the influence of nano-TiO2 on the working and mechanical properties of concrete is studied, and the influence of $mathbf{nano}-mathbf{TiO}_{2}$ on the anti-pollution performance of concrete is standardized by testing the growth of algae, The conclusions are as follows: the concrete that meets the construction requirements can be prepared after adding $mathbf{nano}-mathbf{TiO}_{2}$. However, because the particle size of $mathbf{nano}-mathbf{TiO}_{2}$ is very small, it needs to absorb more mixing water, resulting in the reduction of concrete working performance and the need to greatly increase the amount of admixture; with the increase of $mathbf{nano}-mathbf{TiO}_{2}$ content, the compressive strength of concrete at all ages is improved, the relative value of concrete fluorescence is significantly decreased, and the anti-pollution ability of concrete is improved; the most serious part of concrete biological pollution is the dry wet cycle area.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"156 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":"116075218","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}
At present, there is no unified standard for the relative safe distance between the anchorage outside the harbor and other offshore structures, shoals, reefs, etc., and there is no specific reference conclusion in the existing research results, which causes confusion for the planning, site selection and protection of offshore anchorage. In this paper, the research about the location of the anchorage requirements in China based on the relative safety of anchorage and the surrounding sea resources distance conducted in-depth research, mainly studies the mooring ship go, drifting direction and speed of dragging anchor process three aspects, such as through the ship maneuvering simulation test further study of the mooring ship may be dragging speed, finally put forward to determine the anchorage and surrounding facilities (or observation) relatively safe distance calculation method. On the basis of the above research, this paper gives some suggestions on the safe avoidance distance of the anchorage outside the harbor, and solves the problem of the specific standards for the safe avoidance of the anchorage outside the harbor, which can be used as a reference for the site selection of the anchorage outside the harbor and the protection of the anchorage resources.
{"title":"Study on relative safe distance between anchorage outside harbor and surrounding Marine resources","authors":"Xuedong Li, Z.Q. Hou, Zili He, Zhaonian Cao, Ruce Xie, Dongxu Yang","doi":"10.1109/ISTTCA53489.2021.9654454","DOIUrl":"https://doi.org/10.1109/ISTTCA53489.2021.9654454","url":null,"abstract":"At present, there is no unified standard for the relative safe distance between the anchorage outside the harbor and other offshore structures, shoals, reefs, etc., and there is no specific reference conclusion in the existing research results, which causes confusion for the planning, site selection and protection of offshore anchorage. In this paper, the research about the location of the anchorage requirements in China based on the relative safety of anchorage and the surrounding sea resources distance conducted in-depth research, mainly studies the mooring ship go, drifting direction and speed of dragging anchor process three aspects, such as through the ship maneuvering simulation test further study of the mooring ship may be dragging speed, finally put forward to determine the anchorage and surrounding facilities (or observation) relatively safe distance calculation method. On the basis of the above research, this paper gives some suggestions on the safe avoidance distance of the anchorage outside the harbor, and solves the problem of the specific standards for the safe avoidance of the anchorage outside the harbor, which can be used as a reference for the site selection of the anchorage outside the harbor and the protection of the anchorage resources.","PeriodicalId":383266,"journal":{"name":"2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)","volume":"44 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":"124982151","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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