【摘要】 通过2块小剪跨比钢板-混凝土组合板试件在集中力作用下抗剪性能试验,对组合板抗剪性能进行了初步分析。试验中主要变化了钢板厚度,得到组合板的极限承载力、变形、受剪破坏形态以及裂缝的发展情况。试验结果表明:小剪跨比钢板-混凝土组合板试件中混凝土最终破坏以斜压破坏为主;通过栓钉的连接,钢板和混凝土协同工作性能良好;截面应变分布基本符合平截面假定。钢板通过栓钉与混凝土的组合效应,显著提高了混凝土的抗剪能力,同时也改善了构件整体延性,该试验的组合板中钢板承担的剪力占总剪力的50%左右。更多还原

【Abstract】 Experiments studying shear behavior were conducted on two simply-supported steel-concrete composite slab specimens with small shear-span ratios subjected to concentrated load to conduct preliminary analyses on the shearing performance of this kind of composite slab. The ultimate bearing capacity, deformation,shear failure mode, and crack development of the composite slabs are obtained through comparison of the specimens with different steel plate thicknesses. The experiment results show that diagonal-compression is the ultimate failure mode of steel-concrete composite slabs with small shear-span ratios. Steel plates can achieve composite action with the concrete through shear connectors, so accordingly the section strain distribution basically accords with the plane section assumption. The shearing capacity of the concrete slabs is increased significantly through the composite effect of steel plates, and furthermore the overall ductility is improved. In the tests, steel plates in steel plate-concrete composite slabs bear over 50% of the total shear.更多还原