台风作用下轻钢屋面自攻钉节点的静力-疲劳统一设计模型  

Unified static-fatigue bearing design model for self-tapping screw joints in light-weight steel roofs under typhoon hazard

作　　者：杨娜[1,2] 白凡[1,2] 刘威 葛瀚文 Yang Na;Bai Fan;Liu Wei;Ge Hanwen(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京交通大学北京市结构风工程与城市风环境重点实验室,北京100044

出　　处：《东南大学学报（自然科学版）》2024年第1期67-71,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(52008020);中央高校基本科研业务费专项资金资助项目(2022XKRC006);高等学校学科创新引智计划资助项目(B13002)。

摘　　要：对已受疲劳损伤的V125型屋面板自攻钉节点进行静力拉伸试验,获得该类节点在不同幅值疲劳加载作用后的剩余承载力,并分析其在受静载作用下的损伤演化过程,提出了风致疲劳作用下的承载力折减及退化系数计算方法,建立了静力-疲劳统一设计模型.根据实验结果,推导拟合了风速与风致疲劳折减系数的相关关系.根据我国沿海11个城市的台风风速概率信息,给出了适用于相应城市的V125型自攻钉节点的静力-疲劳承载力退化模型.结果表明:V125型自攻钉节点的疲劳极限为其静力极限承载力的20%;在风致疲劳作用下,中国台北的轻钢屋面自攻钉节点的疲劳损伤折减系数最大,上海地区自攻钉节点的疲劳损伤折减系数最小.The static tensile tests of self-tapping screw joints of a fatigue-damaged V125 roof are conducted to obtain the remaining bearing capacity of these joints after fatigue loading with different amplitudes.Meanwhile,the damage evolution process under static loading is analyzed.The unified static-fatigue bearing design model of the V125 self-tapping screw joints including reduction and degradation factors under the wind-induced fatigue action is proposed.According to the experimental results,the correlation between the wind speed and the wind-induced fatigue reduction coefficient is derived.Based on the typhoon wind speed probability information of 11 coastal cities in China,the unified static-fatigue design models suitable for V125 self-tapping joints in the corresponding cities are put forward.The results show that the fatigue limit of the V125 self-tapping joints is 20%of its static bearing capacity.The typhoon-induced fatigue damage reduction coefficient of the joints in Taipei,China is the largest,while that in Shanghai is the smallest.

关 键 词：轻钢屋面系统 自攻钉节点 风致疲劳 设计方程 

分 类 号：TU392.1[建筑科学—结构工程]