论文部分内容阅读
针对1榀两层单跨新型卷边PEC柱-钢梁摩擦耗能T形件连接组合框架子结构试验试件,采用有限元商业软件ABAQUS对其在拟静力荷载下的抗震性能进行数值模拟。基于模拟结果,分析试件结构滞回特征、水平抗侧刚度、节点连接力学性能、耗能机理、层间传力模式和破坏机构等抗震性能。结果显示:试件具有较高的承载能力和较大的水平抗侧刚度,且上下层初水平抗侧刚度差异随着加载的进行而逐渐趋向一致;试件主要通过摩擦、PEC柱脚混凝土压溃与钢构架屈服和T形件端部截面屈服耗能,且各层耗能较为均匀,试件结构较好实现了“小震利用摩擦耗能、中大震通过结构主体构件屈服耗能”的性态设计目标;试件层间水平剪力由PEC柱平均承担,且侧移表现为剪切型变形模式;试件结构破坏机构为摩擦耗能T形件端部梁截面和PEC柱脚处形成塑性铰的塑性破坏机构,试件结构具有良好的抗震延性。
Aiming at 1 榀 two-span single-span new crimping PEC column-steel beam friction energy T-piece joint frame sub-structure test specimen, the finite element commercial software ABAQUS was used to simulate its seismic performance under quasi-static load . Based on the simulation results, the structural hysteretic characteristics, horizontal lateral stiffness, joint mechanical properties, energy dissipation mechanism, interlayer force transfer mode and failure mechanism were analyzed. The results show that the specimen has higher bearing capacity and greater lateral stiffness, and the difference of the initial lateral stiffness of the upper and lower layers tends to be consistent with the loading. The specimen is mainly composed of friction, PEC column concrete pressure Collapse and steel frame yielding and T-section end yield yield energy, and the energy consumption of each layer is more uniform, the structure of the specimen is better achieved “small earthquake use of friction energy, medium-sized earthquake through the structural body components yield energy ”. The horizontal shear force between specimens was averagely borne by the PEC column and the lateral displacement showed the shear deformation mode. The structural failure mechanism of the specimen was the end beam section of frictional energy T-piece and PEC Column hinge to form a plastic hinge of the plastic failure mechanism, the specimen structure has a good seismic ductility.