Research progress in engineering structures subject to multiple hazards
Li Hongnan1,2 Li Gang1 Zheng Xiaowei1,3 Fu Xing1 Liu Yang1 Dong Zhiqian1 Lv Guanghui1
1. Dalian University of Technology, Dalian 116024, China; 2. Shenyang Jianzhu University, Shenyang 110168, China;
3. China University of Mining and Techology, Xuzhou 221116, China
Abstract：China lies between the Asia-Europe plate, Pacific plate and Indian Ocean plate as well as it has the long coastline, which causes our country where is prone to multiple hazards, e.g., earthquakes, strong winds and rains. The engineering structures, especially high-rise buildings, low-rise buildings community and transmission tower systems are inevitable to be subject to individual and concurrent hazards. However, the traditional design procedure is focused on the worst-case load combination without considering the combined effects of both hazards acting simultaneously. This paper summarizes some achievements on multiple hazards by our research group, which contains the following three parts: (1) According to the earthquake, wind and precipitation data respectively provided by the China Strong Motion Network Center and China Meteorological Administration, this study conducted the individual hazard analysis, further, presented a novel Copula-based approach to model the joint probability distribution of concurrent hazards; (2) and an approach was proposed to evaluate the structural performance and calculate load modification factors against multiple hazards; (3) This study presents the following research in the field of multiple hazards: a. A probabilistic approach was proposed for risk assessment of engineering structures under individual and simultaneous (or bihazards for short) seismic and wind loads; b. This study discusses the research progress in the risk assessment of the low-rise village houses under concurrent earthquakes and floods; c. Finally, this paper shows the achievements in the fragility analysis of transmission tower system subject to combined windrain loads. The results indicate that when considering the occurrence probability of multihazard, simultaneous hazards (e.g., earthquakes, strong winds and rains) will have significant impacts on the structural performance evaluation. Besides, the calculated combined factors of seismic and wind loads are larger than or equal the code-specified values. This further highlights the importance of accounting for the joint effects of multiple hazards on the performance analysis and structural design of engineering structures.
李宏男 李钢 郑晓伟 付兴 刘杨 董志骞 吕光辉. 工程结构在多灾害耦合作用下的研究进展[J]. 土木工程学报, 2021, 54(5): 1-14.
Li Hongnan Li Gang Zheng Xiaowei Fu Xing Liu Yang Dong Zhiqian Lv Guanghui. Research progress in engineering structures subject to multiple hazards. 土木工程学报, 2021, 54(5): 1-14.
