全装配式混凝土楼盖发卡-盖板混合式板缝节点拉剪复合受力性能研究

MECHANICAL PROPERTIES OF HP-CPC CONNECTION OF PREFABRICATED RC FLOOR UNDER COMBINED TENSION AND SHEAR LOADING

为研究全装配式混凝土楼盖发卡—盖板混合式（HP—CPC）板缝连接节点拉剪复合受力性能，对HP—CPC板缝节点在纯剪作用下的受力性能进行试验和拉剪复合荷载作用下的数值模拟分析，对HP—CPC板缝节点在不同剪拉比下的承载力、破坏形式和耦合作用机理等进行较为系统的研究。结果表明：在拉剪复合荷载作用下，拉力对HP—CPC板缝节点的抗剪能力具有削弱作用，且拉剪比越大，拉力对节点抗剪承载力削弱越明显；建立了HP—CPC板缝节点拉—剪相关方程，板缝节点抗剪承载力的试验值、理论值与数值分析结果吻合良好。

An experimental study under pure shear loading and a numerical simulation analysis under combined tension and shear loading for HP-CPC connection were conducted to evaluate the mechanical properties of hairpin-cover plate composite （HP-CPC） connection used in new-type prefabricated RL floor. The bearing capacity, failure mode, and tension-shear interaction were evaluated with different shear-tension ratios. The results showed that the tension could produce a reduction in shear capacity of HP-CPC connection, and the greater the shear-tension ratio, the more obvious the reduction; the tension-shear relative equation provided a theoretical basis for the engineering applications of this kinds of joints connection; the test values, theoretical values and finite element values of shear of HP-CPC connection were in good agreement.