混凝土组合板与冷弯薄壁型钢螺钉连接抗剪性能试验研究  

Experimental study on shear behavior of screw connections between concrete composite plate and cold-formed thin-walled steel

作　　者：贾子文[1] 周绪红[1,2] 刘永健[1] 

机构地区：[1]长安大学陕西省公路桥梁与隧道重点实验室,西安710064 [2]兰州大学土木工程与力学学院,兰州730000

出　　处：《建筑结构》2014年第4期21-24,73,共5页Building Structure

基　　金：国家自然科学基金项目(50578013)

摘　　要：通过对混凝土组合板与冷弯薄壁型钢构件采用自攻螺钉连接抗剪模型进行单调加载试验,分析了螺钉连接模型界面抗剪破坏模式、螺钉抗剪承载力以及混凝土组合板内置或不内置抗剪件对组合板粘结性能的影响。采用规范理论公式计算了单个螺钉抗剪承载力,理论计算结果与试验结果吻合较好。破坏模式表现为:螺钉抗剪破坏、混凝土与压型钢板粘结破坏、压型钢板承压或失稳破坏。混凝土与压型钢板粘结开裂前,内置抗剪件能够提高连接抗剪刚度,减小滑移;内置抗剪件的螺钉抗剪承载力比不内置抗剪件的偏低。建议混凝土和压型钢板之间内置冷弯薄壁型钢抗剪件;当混凝土与压型钢板间考虑或不考虑组合效应时,螺钉连接抗剪承载力应采用不同理论计算方法。Connecting concrete composite plate and cold-formed thin-walled steel components with self-tapping screws as shear model, monotonic loading tests were carried out. Shear failure mode on the interface of screws connection, the shear capacity of screws and influence of shear connectors in concrete composite plate on bond behavior of composite plate were analyzed. Shear capacity of single screw was calculated by code formula and the test results match theoretic results very well. The failure modes are shear failure of screws, bond failure of concrete and profiled steel sheet, and instability failure or bearing failure of profiled steel sheet. Before cracking of bond between concrete and profiled steel sheet, shear connectors inside can increase the shear stiffness of connection and reduce slippage. Shear capacity of screws is a little lower than that of the screws without shear connectors inside. Cold-formed thin-walled steel shear connectors are suggested to use between concrete and profiled steel sheet. Different theoretic calculation methods for shear capacity of screws are necessary according to the consideration of composite effect of concrete and profiled steel sheet.

关 键 词：混凝土组合板 冷弯薄壁型钢 自攻螺钉 抗剪承载力 试验研究 破坏模式 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1