冷弯薄壁型钢-石膏基自流平砂浆组合楼盖滞回性能试验研究  

Experimental study on hysteretic behaviors of cold-formed thin-walled steel-gypsum based self-leveling mortar composite floor

作　　者：石宇 周绪红[1,2] 管宇 程睿[1,2] SHI Yu1,2, ZHOU Xuhong1,2, GUAN Yu3, CHENG Rui1,2(1.Key Laboratory of New Technology for Construction of Cities in Mountain Area of the Ministry of Education, Chongqing University, Chongqing 400045, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 3. College of Civil Engineering, Chang＇ an University, Xi＇ an 710061, Chin)

机构地区：[1]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [2]重庆大学土木工程学院,重庆400045 [3]长安大学建筑工程学院,陕西西安710061

出　　处：《建筑结构学报》2018年第4期110-118,共9页Journal of Building Structures

基　　金：国家重点研发计划项目(2016YFC0701201);国家自然科学基金项目(51678060);中央高校基本科研业务费专项(310828171011)

摘　　要：为研究冷弯薄壁型钢组合楼盖的平面内滞回性能,对不同楼面板类型的压型钢板组合楼盖、压型钢板-石膏基自流平砂浆组合楼盖和设置钢丝网的压型钢板-石膏基自流平砂浆组合楼盖足尺模型进行了平面内循环往复加载试验,分析了组合楼盖的破坏形式、承载能力和延性等。试验结果表明：冷弯薄壁型钢组合楼盖最终破坏都表现为固定边梁与压型钢板之间的自攻螺钉连接破坏,而石膏基自流平砂浆楼面板和中间楼盖梁发生微小破坏。三个组合楼盖均表现出较好的平面内受力性能,具有良好的面内承载力和刚度、耗能性能、延性等,冷弯薄壁型钢-石膏基自流平砂浆组合楼盖的整体工作性能良好。采用钢丝网构造有助于提高楼盖的面内刚度以及组合楼板的黏结性能和抗裂性能,但对楼盖的延性会有不利影响。In order to research the in-plane hysteretic behavior of cold-formed steel floor, in-plane cyclic loading tests of three full scale models of cold-formed thin-walled steel composite floors with different patterns of floor panel were carried out. The three models were profiled steel sheet composite floor, profiled steel sheet-gypsum based self-leveling mortar composite floor and profiled steel sheet-gypsum based self-leveling mortar composite floor with wire mesh. The failure mode, bearing capacity and ductility as well as bond behavior of floors were investigated. Experimental results show that the failure mode of specimen is the shear failure of the self-drilling screws connecting corrugated metal deck to end joists. Only minor damages occur to the gypsum based self-leveling mortar floor panel and middle CFS joists. The three floor specimens show good in-plane mechanical behavior in terms of bearing capacity, stiffness, energy dissipation and ductility. The overall working performance of the cold-formed thin-walled steel-gypsum based self- leveling mortar composite floor is exceptional. The application of wire mesh can improve the in-plane stiffness, bonding properties and crack resistance of composite slabs. However, it has negative influence on ductility of floor.

关 键 词：组合楼盖 冷弯薄壁型钢 石膏基自流平砂浆 拟静力试验 滞回性能 

分 类 号：TU391[建筑科学—结构工程] TU317.1