压型钢板-陶粒混凝土组合楼板火灾响应及火灾后受力性能试验研究

为了分析压型钢板-陶粒混凝土组合楼板的火灾响应，首先对受荷条件下的2块简支陶粒混凝土组合楼板进行了火灾行为试验，得到了其火灾温度响应及位移响应。在此基础上，进一步对2块受火后的压型钢板-陶粒混凝土组合楼板进行了火灾后受力性能试验研究，并对1块具有相同参数的组合楼板开展了常温下静载试验。结果表明：在楼板内部设置焊接栓钉将减弱组合楼板的抗火性能、降低组合楼板火灾后的承载力；与未受火作用的同样规格的组合楼板相比，火灾后压型钢板-陶粒混凝土组合楼板的破坏形式发生较大变化，但仍具有较高的承载力和良好的受力性能；压型钢板-陶粒混凝土组合楼板受火后为弯曲破坏，而未受火楼板则为剪切滑移破坏。

Experimental study of fire response and post-fire mechanical performance of profiled sheet-ceramsite concrete composite floor

In order to investigate the fire behavior of profiled sheet-ceramsite concrete composite floors(abbreviated as PCCF),the fire response and structural response of two simply supported PCCF under static load were first obtained through fire experiment.Then experimental study of the post-fire mechanical performance of two composite floors after exposure to fire were carried out,and the static test of the profiled sheet-ceramsite concrete composite floor which had the same construction and dimension as the floor subjected to fire load presented here was conducted.The experimental results show that the fire-resistant ability and the post-fire bearing capacity of the composite floor can be weakened by the welding studs set in the floor.Compared with the composite floor with the same construction and dimension as the floor subjected to fire load,the failure pattern of the profiled sheet-ceramsite concrete composite floor after exposure to fire has great variation,but still has higher post-fire bearing capacity and better mechanical behavior.It is shown that the composite floor after exposure to fire exhibits the failure pattern of bending failure and the composite floor which is not subjected to fire load exhibits the failure pattern of shearing failure.