简支钢板-混凝土组合板受弯性能及承载力分析  

Flexural behavior and bearing capacity of simply supported steel plate-concrete composite slab

作　　者：吴丽丽[1,2] 姜宇鹏[1,2] 张栋栋[1,2] 严茂超[1,2] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学力学与建筑工程学院,北京100083

出　　处：《建筑结构学报》2015年第12期125-134,共10页Journal of Building Structures

基　　金：国家自然科学基金项目(51278488);煤炭资源与安全开采国家重点实验室开放课题项目(SKLCRSM14KFB05)

摘　　要：对9块钢板-混凝土组合板试件进行了单点和两点对称集中加载静力试验研究,分析了组合板中栓钉间距、钢板厚度、混凝土板厚度和组合板几何尺寸等因素对组合板受弯承载性能的影响。对组合板试件的破坏形态、钢板与混凝土应变发展情况、裂缝发展情况及组合板承载能力进行了研究。试验结果表明:钢板-混凝土组合板的破坏形式主要有钢板剥离破坏、混合破坏、剪切破坏;在加载过程中,截面纵向应变沿组合板高度基本符合平截面假定;栓钉间距、混凝土板厚对组合承载力影响较大,两者变化时对应的承载力最大增幅分别为45%和42%,而钢板厚度影响次之,承载力增幅最大为20%,组合板几何尺寸影响最小。推导了考虑交界面滑移效应的组合板受弯承载力的计算式,计算结果与试验结果吻合良好。Steel plate-concrete composite slabs are composed of common steel plate and concrete connected by shear stud connectors. Static tests under single-point and two-point symmetric loading were conducted on nine specimens of simply supported composite slabs to study the flexural behaviors. Based on the experimental results,the influences of the spacing of the shear stud connectors,the thickness of the steel plate and the concrete slab and geometric dimensions on the flexural behavior of the composite slabs were analyzed. Moreover,the failure modes,concrete strain,types of cracking,interface slippage and bearing capacity of the slabs were studied. Experimental results show that the steel plate-concrete composite slabs exhibit three types of failure modes,including steel strip damage,mixed failure and shear failure. The distribution of the longitudinal strain of the composite section along the depth of the section approximately agrees with the assumption of plane section during the course of deformation. The test results show that the spacing of the stud connectors and the thickness of the concrete plate have more influence on the bearing capacity of composite slab,and the maximum increase rate of bearing capacity is around 45% and 42% respectively.While the impact of thickness of steel plate on the variation of bearing capacity is 20%,and geometry size of composite slab has the least influence on the bearing capacity. The flexural capacity considering the interface slip was analyzed.The calculation results are in good agreement with the test results.

关 键 词：钢板-混凝土组合板 栓钉剪力连接件 静力试验 破坏形态 受弯承载力 

分 类 号：TU398.9[建筑科学—结构工程]