论文部分内容阅读
为研究多高层预制混凝土结构装配式边节点的抗震性能,采用足尺模型试验方法,对高轴压预制梁-柱-叠合板装配边节点试件在低周反复荷载作用下的开裂破坏形态、滞回特性、骨架曲线、延性与耗能等进行了研究,并与相同构件参数的整体现浇试件进行了对比。基于OPENSEES建立了考虑梁底锚固钢筋滑移的装配节点数值模型,并用试验结果加以验证,在此基础上进行了不同影响因素的参数分析。研究结果表明:此类装配式混凝土边节点核心区受力钢筋没有出现粘结破坏、锚固性能良好,其承载力、耗能性能及延性与整体现浇混凝土节点相当;柱轴压水平对节点承载力影响较小而柱截面尺寸对节点承载力影响较大,钢筋直径影响节点加卸载刚度及捏拢效应而对承载力影响较小。
In order to study the seismic behavior of prefabricated prefabricated reinforced concrete structural joints, the full-scale model test is used to analyze the failure modes of prestressed concrete-filled prefabricated beam-column joints under low cyclic load. Hysteresis characteristics, skeleton curves, ductility and energy dissipation were studied and compared with the overall cast-in-place specimens with the same component parameters. Based on OPENSEES, a numerical model of the assembly node considering the steel bar anchorage of steel bar anchorage was established and validated with the test results. The parameters of different influencing factors were analyzed. The results show that there is no bond failure in the core region of such prefabricated concrete, and the anchorage performance is good. The bearing capacity, energy dissipation performance and ductility are equivalent to those of the whole cast-in-place concrete. The influence of the force is small and the cross-sectional dimension of the column has a greater impact on the bearing capacity of the joint. The diameter of the reinforcing steel affects the loading and unloading stiffness and the pinch-in effect of the joint, but has less effect on the bearing capacity.