冷弯型钢角钢连接件抗剪承载力计算方法研究  

Research on calculation method of shear capacity of cold-formed steel clip angles

作　　者：陈亮[1] 高浩博 刘阳[1] 虞诚 陈新喜[3] 张文莹 CHEN Liang;GAO Haobo;LIU Yang;YU Cheng;CHEN Xinxi;ZHANG Wenying(Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China;Department of Engineering Technology,University of North Texas,Denton 76207,USA;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135,China)

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点试验室,北京100124 [2]北德克萨斯州大学工程系,丹顿76207 [3]中国建筑第八工程局有限公司,上海200135

出　　处：《建筑结构》2021年第23期76-81,75,共7页Building Structure

基　　金：北京市自然科学基金(8204053);北京市教委项目(KM202010005029)。

摘　　要：冷弯型钢角钢连接件主要用于冷弯薄壁结构各构件的连接。为研究冷弯型钢角钢连接件的抗剪承载能力,建立有限元分析模型。同时对比不同连接件厚度、螺钉数目和间距的试件的荷载-位移曲线、抗剪承载能力和失效模式特征,总结影响其抗剪性能的主要因素,验证相关学者理论公式的合理性。结果表明,应用有限元分析模型可以有效模拟冷弯型钢角钢连接件的破坏模式,与试验的荷载-位移曲线和各类力学性能指标等均吻合较好,具有较高的可靠度和计算精度。连接件厚度和螺钉布置均为影响冷弯型钢角钢连接件抗剪性能的重要因素,按现有名义抗剪强度计算公式分析结果偏于保守,根据已有试验和有限元分析结果,提出了更具普适性的冷弯型钢角钢连接件抗剪承载能力计算方法。The cold-formed steel(CFS)clip angles are commonly used for the connection of various components of coldformed thin-walled structures.Some models of finite element analysis were established to investigate the shear bearing capacity of the CFS clip angles.At the same time,the load-displacement curve,shear bearing capacity and failure mode characteristics of specimens with different connector thickness,screw number and spacing were compared,the main factors affecting the shear performance of specimens were summarized,and the rationality of the theoretical formulas of related scholars was verified.The results show that the application of the finite element analysis model can effectively simulate the failure mode of CFS clip angles,which is in good agreement with the test load-displacement curve and various mechanical performance indicators,and has high reliability and calculation accuracy.The thickness of the connector and the arrangement of screws are both important factors affecting the shear performance of CFS clip angles.According to the existing nominal shear strength calculation formula,the analysis results are conservative.Based on the existing test and the finite element analysis results,a more universal calculation method of shear bearing capacity of CFS clip angles was proposed.

关 键 词：冷弯型钢角钢连接件 抗剪承载力 设计方法 名义抗剪强度 直接强度法 

分 类 号：TU392.5[建筑科学—结构工程]