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压型钢板混凝土组合楼板是由混凝土与压型钢板组成且共同受力的一种楼板形式,具有施工便捷、受力合理、材料性能充分利用等优点。为了研究火灾条件下压型钢板混凝土组合楼板的承载机制以及破坏模式,采用ISO-834标准升温曲线,对2块压型钢板混凝土组合楼板进行了火灾条件下的试验研究,考察了组合楼板在火灾作用下板顶与板底的裂缝开展和分布情况,揭示了火灾下组合楼板的破坏模式,给出了楼板内部不同位置处的挠度—时间曲线、温度—时间曲线。通过对试验结果的对比分析,证明了受拉薄膜效应力是建筑火灾楼板体系的最终承载力。
The pressure plate concrete composite floor is a kind of floor form which is made up of concrete and compression steel plate and is jointly supported. It has the advantages of convenient construction, reasonable force and full utilization of material properties. In order to study the bearing mechanism and failure mode of composite steel floor slab under fire conditions, the ISO-834 standard temperature rise curve was used to test the two composite steel slab floor under fire conditions. The effects of fire, Under the action of the roof and the bottom of the crack development and distribution of the situation reveals the fire under the composite floor failure mode, given the floor at different locations within the deflection - time curve, temperature - time curve. Through the comparative analysis of the test results, it is proved that the tension force of tensioned film is the ultimate bearing capacity of building fire floor system.