摘要
对冷弯薄壁型钢-石膏基自流平砂浆组合楼盖足尺模型进行了平面内低周往复加载试验,研究了组合楼盖的破坏形式、面内承载力、面内刚度以及耗能性能。试验结果表明: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优异,具有良好的面内受力性能;组合楼盖因C形边梁与压型钢板之间的螺钉连接发生破坏而导致面内承载力降低,进而发生破坏;组合楼盖的面内刚度和耗能性能均随C形边梁位置处自攻螺钉受剪性能的降低而减小。采用ABAQUS有限元软件对试验模型进行模拟分析,并对验证后的有限元模型进行了变参数分析,研究表明:当砂浆翼板的厚度在20~40 mm之间时,厚度的改变对组合楼盖面内受力性能影响较大;当砂浆翼板的厚度在40~80 mm之间时,厚度的改变对组合楼盖面内受力性能的影响较小。
One full scale model of cold-formed thin-wall steel-gypsum based self-leveling mortar composite floor was constructed for in-plane low cyclic loading test. The failure mode,in-plane bearing capacity,in-plane stiffness and energy dissipation of composite floor was investigated. Experimental results show that the overall working performance as well as the in-plane mechanical behavior of cold-formed thin-walled steel-gypsum based self-leveling mortar composite floor is outstanding. The composite floor is damaged by the failure in self-tapping screws connected C-shaped end joists and corrugated metal deck as in-plane bearing capacity is decreased. The in-plane stiffness and energy dissipation performance of composite floor is decreased with the reduction of self-tapping screw shear behavior in Cshaped end joists. ABAQUS finite element software was used to conduct simulation analysis of test model as well as variable parametric analysis based on calibrated model. Finite element analysis shows that the thickness of mortar panel from 20 mm to 40 mm has a great influence on in-plane mechanical behavior of floor,while the thickness of mortar panel from 40 mm to 80 mm has a little effect on in-plane mechanical behavior of floor.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2017年第S1期17-24,共8页
Journal of Building Structures
基金
国家重点研发计划"绿色建筑及建筑工业化"专项(2016YFC0701201)
国家自然科学基金面上项目(51678060)
中央高校基本科研业务费专项资金(310828171011)
关键词
冷弯薄壁型钢
组合楼盖
低周往复试验
有限元分析
平面内受力性能
cold-formed steel
composite floor
low-frequency cyclic test
finite element analysis
in-plane mechanical behavior
