门窗系统失效对轻钢结构屋面风致易损性影响  

Effects of Doors and Windows System Failure on Wind Fragility of Light Steel Roof

作　　者：张皓[1] 尹浩 刘鹏飞 张锡龙 董超 ZHANG Hao;YIN Hao;LIU Pengfei;ZHANG Xilong;DONG Chao(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;China Construction Second Engineering Bureau Ltd,Shenyang,China,110000)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]中国建筑第二工程局有限公司,辽宁沈阳110000

出　　处：《沈阳建筑大学学报（自然科学版）》2023年第1期71-78,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：“十三五”国家重点研发计划项目(2018YFD1100404);国家自然科学基金重点项目(51738007);沈阳市中青年科技创新人才支持计划项目(RC220171)。

摘　　要：目的 研究在风荷载作用下,低层冷弯薄壁型钢结构房屋门窗系统失效对屋面失效破坏产生的影响。方法 建立二层冷弯薄壁型钢结构模型,采用蒙特卡洛方法模拟计算不同抗风压等级门窗在风压及飞掷物共同作用下的失效概率;两种门窗系统失效状态,采用基于构件的易损性评估法建立不同门窗系统失效状态下屋面的风致易损性曲线。结果 抗风压强度等级对门窗系统的风致失效概率存在较为显著的影响,迎风面门窗的失效会使屋面达到各极限破坏状态所需的名义风速有不同程度的降低。结论 适当地提高门窗抗风压等级可有效降低迎风墙面形成无遮掩洞口的概率,避免因室内压力骤增造成屋面过早破坏,在结构抗风设计中应合理考虑外门窗抗风性能及影响。The purpose of this paper is to study the influence of doors and windows system failure of low-rise cold-formed thin-walled steel structure on the failure of roof system under wind load.A two-story cold-formed thin-walled steel structure model is established, and the failure probability of doors and windows with different wind pressure levels under the combined action of wind pressure and flying objects is simulated by Monte Carlo method.Two kinds of door and window system failure states are proposed.The wind-induced vulnerability curves of roof under different failure states of door and window system are established by component-based vulnerability assessment method.The results show that the wind pressure strength grade has a significant effect on the wind-induced failure probability.The failure of windward doors and windows will reduce the nominal wind speed required for the roof to reach each limit failure state to varying degrees.It is concluded that appropriately increasing the wind pressure level of doors and windows can effectively reduce the probability of forming an uncovered opening on the windward wall surface, and avoid premature damage to the roof caused by the sudden increase of indoor pressure.The wind resistance performance and influence of external doors and windows should be reasonably considered in the wind resistance design of the structure.

关 键 词：风荷载 低层冷弯薄壁型钢结构 易损性 抗风设计 

分 类 号：TU392.1[建筑科学—结构工程]