轻钢房屋整体风致易损性分析  

Wind induced vulnerability analysis for a whole light steel building

作　　者：吴凤波 姚新桂 周豪杰 黄国庆 聂诗东[2] 冀骁文 宫婷 WU Fengbo;YAO Xingui;ZHOU Haojie;HUANG Guoqing;NIE Shidong;JI Xiaowen;GONG Ting(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Chongqing University,Chongqing 400044,China;School of Architectural Engineering,Beijing University of Technology,Beijing 100124,China;China Re Catastrophe Risk Management Company Ltd.,China Re,Chongqing 400020,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆大学土木工程学院,重庆400044 [3]北京工业大学建筑工程学院,北京100124 [4]中再巨灾风险管理股份有限公司,重庆400020

出　　处：《振动与冲击》2024年第9期84-93,共10页Journal of Vibration and Shock

基　　金：重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX1349);重庆市教育委员会科学技术研究项目(KJQN202200729);中国博士后科学基金面上资助(2023M733017);重庆市博士后研究项目特别资助(2022CQBSHTB3049)。

摘　　要：轻钢房屋被广泛用于民宅和厂房等低矮建筑中。该类结构轻质,对风荷载较为敏感,在台风中破坏严重,造成了巨大的经济损失,因此对该结构进行风灾评估具有重要意义。首先,基于随机模拟技术提出了轻钢房屋整体结构风致易损性的分析框架,其中涉及风荷载随机化方法、主体结构和围护结构风致易脆性分析方法以及房屋整体结构风致易损性分析流程。其次,基于所提框架对一具体轻钢结构风致易损性进行了案例分析,结果表明,所提方法较好考虑了飞掷物和风压联合作用及其造成的内压变化效应,并可将主体结构和围护结构的风灾损失进行融合,获得结构整体易损性曲线。Light steel houses are widely used in low rise buildings,such as,residential and factory buildings.This type structures are lightweight and more sensitive to wind load,and they are severely damaged in typhoons to cause huge economic losses.Therefore,performing wind disaster assessment for this type structures is of great significance.Here,firstly,based on random simulation technique,the analysis framework for wind induced vulnerability of a whole light steel house was proposed,it was related to wind load randomization methods,wind induced brittleness analysis methods for main structure and enclosure structure,and wind induced vulnerability analysis process for house whole structure.Secondly,a case study was performed for wind-induced vulnerability of a specific light steel structure based on the proposed framework.The results showed that the proposed method can better consider the joint action of flying objects and wind pressure as well as the internal pressure change effect caused by the joint action;it can also fuse wind disaster losses of main structure and whole enclosure structure to obtain vulnerability curve of whole structure of a light steel house.

关 键 词：轻钢房屋 主体结构 围护结构 风致易脆性 风致易损性 

分 类 号：TU392.5[建筑科学—结构工程] TU312.1