Jun Song, Huiquan Miao, Zilan Zhong, Yanqiong Ding, Mi Zhao, Xiuli DU
: In view of the existing various seismic hazard analysis methods, the seismic hazard analysis method based on historical seismic intensity data and the probabilistic seismic hazard analysis method to analyze the seismic hazards of the main urban area in Beijing was taken, and the peak ground acceleration with a probability of exceeding 10% in 50 years was obtained. The results showed that the peak ground acceleration of the main urban area in Beijing was of obvious spatial variability, which was gradually increasing from the west of the city to the east; the results obtained from those two methods were reliable and the differences were slight. The methods had their own characteristics, the former had fewer assumptions including site effects and was moderately difficult to calculate
{"title":"Comparisons of Seismic Hazard Analysis Methods for Engineering Sites","authors":"Jun Song, Huiquan Miao, Zilan Zhong, Yanqiong Ding, Mi Zhao, Xiuli DU","doi":"10.3724/j.gyjzg23120204","DOIUrl":"https://doi.org/10.3724/j.gyjzg23120204","url":null,"abstract":": In view of the existing various seismic hazard analysis methods, the seismic hazard analysis method based on historical seismic intensity data and the probabilistic seismic hazard analysis method to analyze the seismic hazards of the main urban area in Beijing was taken, and the peak ground acceleration with a probability of exceeding 10% in 50 years was obtained. The results showed that the peak ground acceleration of the main urban area in Beijing was of obvious spatial variability, which was gradually increasing from the west of the city to the east; the results obtained from those two methods were reliable and the differences were slight. The methods had their own characteristics, the former had fewer assumptions including site effects and was moderately difficult to calculate","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"480 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140466040","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}
: The complexity of major transportation infrastructure projects makes them prone to various conflicts of interest during the construction process, and various risk factors interact with each other, which can easily lead to social stability problems. In the paper, social stability risks were divided into internal risks and external risks, social stability risk indicators were selected based on the five dimensions of government, public, ecology, economy and society, the risk coupling relations of each dimension was analyzed, a coupling model of social stability risks of major transportation infrastructure construction projects based on sys-tem dynamics was established
{"title":"Scenario Simulation of Social Stability Risks of a Tunnel Project in Qingdao Based on System Dynamics Model","authors":"Zhiguo Shao, Changqin Ai, Mengdi Li","doi":"10.3724/j.gyjzg23120803","DOIUrl":"https://doi.org/10.3724/j.gyjzg23120803","url":null,"abstract":": The complexity of major transportation infrastructure projects makes them prone to various conflicts of interest during the construction process, and various risk factors interact with each other, which can easily lead to social stability problems. In the paper, social stability risks were divided into internal risks and external risks, social stability risk indicators were selected based on the five dimensions of government, public, ecology, economy and society, the risk coupling relations of each dimension was analyzed, a coupling model of social stability risks of major transportation infrastructure construction projects based on sys-tem dynamics was established","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"291 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140470274","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}
: Infill walls are commonly subjected to bidirectional seismic actions in actual seismic events. A robust interaction prevails between the in-plane and out-of-plane seismic performance of infill walls, where in-plane damage often diminishes the out-of-plane bearing capacity of infill walls. A finite element model for RC frames with infill walls was established and validated against experimental data, and extensively employed in numerical analysis. The objective was to delve into the seismic performance of masonry infill walls under bidirectional loading, considering the effects of loading modes, aspect ratio, slenderness ratio, and block compressive strength on the out-of-plane bearing capacity of infill walls with prior in-plane damage. Based on experimental data and parameter analysis, a formula for predicting out-of-plane bearing capacity reduction factors of masonry infill walls with prior in-plane damage was proposed. A new comprehensive geometric parameter was introduced considering the mechanism of out-of-plane load transfer for infill walls. The new formula exhibited a superior fit with experimental data compared to existing equations.
{"title":"Effects of In-Plane Damage of infill Walls on Their Out-of-Plane Bearing Capacity Reduction Factors","authors":"Wei Jin, Changhai Zhai, W. Liu","doi":"10.3724/j.gyjzg23121430","DOIUrl":"https://doi.org/10.3724/j.gyjzg23121430","url":null,"abstract":": Infill walls are commonly subjected to bidirectional seismic actions in actual seismic events. A robust interaction prevails between the in-plane and out-of-plane seismic performance of infill walls, where in-plane damage often diminishes the out-of-plane bearing capacity of infill walls. A finite element model for RC frames with infill walls was established and validated against experimental data, and extensively employed in numerical analysis. The objective was to delve into the seismic performance of masonry infill walls under bidirectional loading, considering the effects of loading modes, aspect ratio, slenderness ratio, and block compressive strength on the out-of-plane bearing capacity of infill walls with prior in-plane damage. Based on experimental data and parameter analysis, a formula for predicting out-of-plane bearing capacity reduction factors of masonry infill walls with prior in-plane damage was proposed. A new comprehensive geometric parameter was introduced considering the mechanism of out-of-plane load transfer for infill walls. The new formula exhibited a superior fit with experimental data compared to existing equations.","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"267 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140468027","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}
: To ensure the construction safety of high-formwork support structures, a set of construction intelligent real-time monitoring method based on computer vision and finite element technology was proposed. A refined finite element model was established according to the real situation of the rods arrangement of the high-formwork support structure, and the buckling analysis was carried out under a variety of working conditions, so as to obtain the vertical displacement of the key joints during the buckling damage of the high-formwork support structure, and to obtain the alarm threshold value of the intelligent real-time monitoring of the construction. The intelligent real-time monitoring algorithm based on computer vision was developed to monitor the displacement changes of the high-formwork support structure in the construction process in real time, and the algorithm will automatically alarm and guide the elimination of dangers and the protection of construction safety when unsafe displacement occurs. After the construction, according to the theoretical calculation re-sults and the actual measurement results, the finite element model was corrected parametrically, and the corrected finite element model was subjected to buckling damage analysis, and the sizes of the corrected buck-ling vertical displacement and the alarm threshold were compared to illustrate the reasonableness of the alarm threshold. The successful completion of a high-formwork support structure project for a multi-use building verified the effectiveness of the new construction monitoring method proposed in the paper.
{"title":"A Safety Monitoring Method for High-Formwork Support Structures Based on Computer Vision Recognition","authors":"Changzheng Chi, Bo Pang, Jiangtao REN, Yin Lu, Xianzhe Li, Mingfeng Huang","doi":"10.3724/j.gyjzg23121903","DOIUrl":"https://doi.org/10.3724/j.gyjzg23121903","url":null,"abstract":": To ensure the construction safety of high-formwork support structures, a set of construction intelligent real-time monitoring method based on computer vision and finite element technology was proposed. A refined finite element model was established according to the real situation of the rods arrangement of the high-formwork support structure, and the buckling analysis was carried out under a variety of working conditions, so as to obtain the vertical displacement of the key joints during the buckling damage of the high-formwork support structure, and to obtain the alarm threshold value of the intelligent real-time monitoring of the construction. The intelligent real-time monitoring algorithm based on computer vision was developed to monitor the displacement changes of the high-formwork support structure in the construction process in real time, and the algorithm will automatically alarm and guide the elimination of dangers and the protection of construction safety when unsafe displacement occurs. After the construction, according to the theoretical calculation re-sults and the actual measurement results, the finite element model was corrected parametrically, and the corrected finite element model was subjected to buckling damage analysis, and the sizes of the corrected buck-ling vertical displacement and the alarm threshold were compared to illustrate the reasonableness of the alarm threshold. The successful completion of a high-formwork support structure project for a multi-use building verified the effectiveness of the new construction monitoring method proposed in the paper.","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"209 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140462870","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}
Li Li, Yao Wang, Han Wu, Baojun Li, Hongling Guo, Yuecheng Huang, Dongping Fang
{"title":"Safety Leadership and Safety Culture Enhancement in Construction Projects: the Case of Ma Wan Tunnel Project","authors":"Li Li, Yao Wang, Han Wu, Baojun Li, Hongling Guo, Yuecheng Huang, Dongping Fang","doi":"10.3724/j.gyjzg23021204","DOIUrl":"https://doi.org/10.3724/j.gyjzg23021204","url":null,"abstract":"","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"1038 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467352","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}
: Digital twin technology is being rapidly applied and developed in the field of urban water security. Firstly, the paper sorted out and analyzed the current situation of digital twin technology applications for urban water security, explained the framework of urban water security system based on digital twins, and introduced the key techniques and capability requirements in the digital twin system from the perception and collection layer, infrastructure layer, data layer, model layer, knowledge layer, and application layer. Sec-ondly, the application progress of digital twins in urban water security was reviewed, including flood control and disaster reduction, water resource conservation and intensive safe utilization, water ecological protection, and intelligent water conservancy engineering. The construction progress and application effectiveness of digital twin platforms for water conservancy projects in typical cities were introduced. Finally, the paper summarized the challenges faced by the in-depth application of digital twins in the field of urban water security and proposed prospects, aiming to provide a reference and guidance for the construction of urban water security capabilities that integrate digital twin technology.
{"title":"A Review on Digital Twin Application Research for Urban Water Security","authors":"Haifeng Huang, Yang Yin, Yi Zhou, Didan Yang","doi":"10.3724/j.gyjzg23120902","DOIUrl":"https://doi.org/10.3724/j.gyjzg23120902","url":null,"abstract":": Digital twin technology is being rapidly applied and developed in the field of urban water security. Firstly, the paper sorted out and analyzed the current situation of digital twin technology applications for urban water security, explained the framework of urban water security system based on digital twins, and introduced the key techniques and capability requirements in the digital twin system from the perception and collection layer, infrastructure layer, data layer, model layer, knowledge layer, and application layer. Sec-ondly, the application progress of digital twins in urban water security was reviewed, including flood control and disaster reduction, water resource conservation and intensive safe utilization, water ecological protection, and intelligent water conservancy engineering. The construction progress and application effectiveness of digital twin platforms for water conservancy projects in typical cities were introduced. Finally, the paper summarized the challenges faced by the in-depth application of digital twins in the field of urban water security and proposed prospects, aiming to provide a reference and guidance for the construction of urban water security capabilities that integrate digital twin technology.","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"509 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469201","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}
K. Gao, Deyuan Deng, Hongping Zhu, S. Weng, Fei GAO
: To address the insufficient research on the measurement of static and dynamic deformations of super high-rise buildings during the construction stage, a structural health monitoring (SHM) system was installed on the main structure of a practical super high-rise building with a height of 335 m. Thus the temperature deformation, vertical deformation, and dynamic displacement of the main structure during the construction stage were measured and analyzed. The uneven distribution of temperature in the main structure during the construction stage was identified, and the strain characteristics of the structure under the influence of temperature were analyzed. The results showed that the strain caused by seasonal temperature difference was greater than the strain caused by the self-weight of the upper structure and the concrete shrinkage and creep over the same period. The developments of the vertical deformation and the inter-story uneven deformation during the construction stage were explained. The degree of uneven deformation increased with structural height and time. The maximum deformation difference among the points of the same floor was 5.3 mm. The axial stress of the girder was positive correlated with the difference in vertical strain between the two ends of the girder. The difference in vertical deformation between the outer frame and the core tube could lead to tensile cracking in the girder. A structural dynamic displacement estimation method based on Kalman filtering was proposed, which could improve could the accuracy of dynamic displacement estimation by fusing acceleration data and strain data, and could accurately estimate the dynamic displacement of super high-rise building under dynamic construction loads.
{"title":"Static and Dynamic Deformation Monitoring of Super High-Rise Buildings During the Construction Stage","authors":"K. Gao, Deyuan Deng, Hongping Zhu, S. Weng, Fei GAO","doi":"10.3724/j.gyjzg23081112","DOIUrl":"https://doi.org/10.3724/j.gyjzg23081112","url":null,"abstract":": To address the insufficient research on the measurement of static and dynamic deformations of super high-rise buildings during the construction stage, a structural health monitoring (SHM) system was installed on the main structure of a practical super high-rise building with a height of 335 m. Thus the temperature deformation, vertical deformation, and dynamic displacement of the main structure during the construction stage were measured and analyzed. The uneven distribution of temperature in the main structure during the construction stage was identified, and the strain characteristics of the structure under the influence of temperature were analyzed. The results showed that the strain caused by seasonal temperature difference was greater than the strain caused by the self-weight of the upper structure and the concrete shrinkage and creep over the same period. The developments of the vertical deformation and the inter-story uneven deformation during the construction stage were explained. The degree of uneven deformation increased with structural height and time. The maximum deformation difference among the points of the same floor was 5.3 mm. The axial stress of the girder was positive correlated with the difference in vertical strain between the two ends of the girder. The difference in vertical deformation between the outer frame and the core tube could lead to tensile cracking in the girder. A structural dynamic displacement estimation method based on Kalman filtering was proposed, which could improve could the accuracy of dynamic displacement estimation by fusing acceleration data and strain data, and could accurately estimate the dynamic displacement of super high-rise building under dynamic construction loads.","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"46 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139640845","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}
{"title":"Current Situation and Development of Retrofitting and Performance Improvement for Existing Building Structures","authors":"Congzhen XIAO, Jianhui Li, Tianyi Ma, Yue Wei, Zhenhong Wu, Baojuan Qiao","doi":"10.3724/j.gyjzg23120812","DOIUrl":"https://doi.org/10.3724/j.gyjzg23120812","url":null,"abstract":"","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"28 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139640719","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}
: Yingxian Wood Pagoda is the oldest and highest pavilion-like wood pagoda in the world, which represents the highest level of wood construction technology in China. As, the wood pagoda has suffered plenty of weathering, disasters and wars, it is urgent to be protected and repaired from its increasing damage and deformation with time. The value analysis is the optimized task of a heritage protection. Therefore, the value composition of Yingxian Wood Pagoda was analyzed from history, science, art and social culture and other multi-value perspectives. The historic value of the wood pagoda was explored from the aspects of architectural styles, structure damages, member forms, Buddhas and hoards. The scientific value of wood tower was explored from the aspect of the structure system and proportion scale. The artistic value was explored from architectural form proportions, Dougong, Buddhas, murals, plaques, wind chimes and calligraphy. The social and cultural values were explored from social condensation, cultural diversity and landscape resources, which was expected to provide reference to future conservation of historical heritage
{"title":"Value Re-Cognition of Yingxian Wood Pagoda from MultipleValue Perspectives","authors":"Kunpeng Zhou, Aiqun Li, Yang Deng","doi":"10.3724/j.gyjzg23072112","DOIUrl":"https://doi.org/10.3724/j.gyjzg23072112","url":null,"abstract":": Yingxian Wood Pagoda is the oldest and highest pavilion-like wood pagoda in the world, which represents the highest level of wood construction technology in China. As, the wood pagoda has suffered plenty of weathering, disasters and wars, it is urgent to be protected and repaired from its increasing damage and deformation with time. The value analysis is the optimized task of a heritage protection. Therefore, the value composition of Yingxian Wood Pagoda was analyzed from history, science, art and social culture and other multi-value perspectives. The historic value of the wood pagoda was explored from the aspects of architectural styles, structure damages, member forms, Buddhas and hoards. The scientific value of wood tower was explored from the aspect of the structure system and proportion scale. The artistic value was explored from architectural form proportions, Dougong, Buddhas, murals, plaques, wind chimes and calligraphy. The social and cultural values were explored from social condensation, cultural diversity and landscape resources, which was expected to provide reference to future conservation of historical heritage","PeriodicalId":516737,"journal":{"name":"Industrial Construction","volume":"14 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139640897","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}