装配式轻钢框架组合楼盖平面外受力性能研究  

Out⁃of⁃plan Behavior Research of Prefabricated Light Steel Frame Composite Floor

作　　者：巩涛 赵博 曹万林[1] 杨兆源 徐涛 王红兵 GONG Tao;ZHAO Bo;CAO Wanlin;YANG Zhaoyuan;XU Tao;WANG Hongbing(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;China Communications Construction Group Co.,Ltd.,Beijing 100022,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Anhui Sijian Holding Group Co.,Ltd.,Hefei,Anhui 230088,China)

机构地区：[1]北京工业大学城市建设学部,北京100124 [2]中交建筑集团有限公司,北京100022 [3]清华大学土木工程系,北京100084 [4]安徽四建控股集团有限公司,安徽合肥230088

出　　处：《施工技术（中英文）》2024年第20期167-174,共8页Construction Technology

基　　金：国家自然科学基金面上项目(52378116)。

摘　　要：提出一种新型装配式轻钢框架组合楼盖,为研究其平面外受力性能,制作1个装配式足尺轻钢框架组合楼盖试件。对足尺试件进行平面外加载试验,研究轻钢框架组合楼盖破坏特征,分析试件承载力、刚度、变形能力及应变。建立装配式轻钢框架组合楼盖精细化有限元模型,进行平面外性能数值模拟及参数分析。结果表明:组合楼盖达到承载力极限状态时,板底受拉裂缝充分发展,钢梁沿弱轴发生扭转变形,底部钢筋断裂。当预制楼板配筋率由0.16%增大至0.42%,0.65%时,组合楼盖承载力分别提高了37.3%,65.2%;当栓钉间距由200mm增大至400,600mm时,楼盖承载力分别降低了8.2%,19.0%。取消楼板与H型钢梁间的抗剪栓钉后,楼盖承载力和刚度分别下降了26.4%,46.0%。数值模拟结果与试验结果吻合较好,通过参数分析优化了楼盖构造,可为工程设计提供参考。A new type of prefabricated light steel frame composite floor was proposed,In order to investigate its out-of-plan force performance,a full-scale prefabricated light steel frame composite floor specimen was fabricated.Out-of-plan loading tests were conducted on the full-scale specimen to investigate the failure characteristics of the light steel frame composite floor.The bearing capacity,stiffness,deformation capacity,and strain of the specimen were analyzed.A refined finite element model of the prefabricated light steel frame composite floor was established,and out-of-plan performance numerical simulation and parameter analysis were carried out.The results show that when the composite floor reached the ultimate state of bearing capacity,the tensile cracks at the bottom of the slab were fully developed,the steel beam underwent torsional deformation along the weak axis,and the bottom reinforcement fractured.The load-carrying capacity of the composite floor increased by 37.3%,65.2%when the reinforcement ratio of the prefabricated floor slab increased from 0.16%to 0.42%,0.65%,respectively.When the spacing of the shear studs increased from 200mm to 400,600mm,the load-carrying capacity of the floor decreased by 8.2%,19.0%,respectively.After removing the shear studs between the floor and the H-shaped steel beam,the bearing capacity and stiffness of the floor decreased by 26.4%,46.0%,respectively.The numerical simulation results agreed well with the experimental results,and the structural design of the floor was optimized through parameter analysis,providing references for engineering design.

关 键 词：装配式 轻钢组合结构 预制楼板 轻钢框架 平面外性能 试验 数值模拟 

分 类 号：TU398[建筑科学—结构工程]