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通过对8块压型钢板-轻骨料混凝土组合楼板进行两点对称集中加载的静力试验,考察了组合楼板的破坏特征、变形性能及受力性能。研究结果表明,对于在压型钢板表面布置抗剪钢筋以及在压型钢板端部设置栓钉的组合楼板,其承载力主要受弯曲破坏控制。在其他条件相同的情况下,抗剪钢筋间距对受弯极限承载力影响不大。根据塑性设计理论,提出了组合楼板截面应力分布计算模型,建立了压型钢板-轻骨料混凝土组合楼板的受弯极限承载力计算公式,并验证了其适用性。
Through the static test of eight symmetrically loaded steel-lightweight aggregate concrete slabs, the failure characteristics, deformation performance and mechanical properties of the composite slab are investigated. The results show that the ultimate bearing capacity of the composite slab with the shear reinforcement arranged on the surface of the profiled steel plate and the studs arranged at the ends of the profiled steel plate is mainly controlled by the bending failure. Under other conditions the same, the spacing of shear reinforcement has little effect on the ultimate bearing capacity. According to the theory of plastic design, the calculation model of stress distribution in composite slab section was put forward, and the formula to calculate the ultimate bearing capacity of composite steel slab - lightweight aggregate concrete slab was established and its applicability was verified.