考虑半高连续填充墙约束的框架柱抗震性能研究

Seismic Performance of Frame Columns Restrained by Continuous Half-height Infilled Walls

为研究实际震害,探讨半高连续填充墙约束下的钢筋混凝土框架柱的抗震性能,设计了两组两跨框架模型进行拟静力试验,对比分析半高连续填充墙对柱抗震性能的影响。使用Perform-3D软件建立宏观数值模型,填充墙构件使用对角斜撑杆件模拟,考察半高连续填充墙的约束效果。分析结果表明:填充墙破坏增加结构耗能,滞回曲线更饱满且具备较优的延性,填充墙对柱有明显约束作用,改变了柱构件原本的破坏模式;数值模拟结果与试验结果一致。鉴于填充墙对结构受力变形影响较大,将其视为非结构构件,忽略其对整体结构的作用是不妥的。

In order to study the seismic performance of reinforced concrete(RC)frame columns confined by half-height continuous infilled walls,we designed two sets of two-span frame models to carry out the quasi-static test,to compare and analyze the influence of the existence of half-height continuous infilled walls on the seismic performance of the columns.Perform-3D software is used to build a macro numerical model,and the infilled walls is simulated by the diagonal strut to investigate the constraint effect of the half-height infilled wall.The results show that the failure of the infilled wall increases the energy consumption of the structure,the hysteretic curve is fuller and its ductility is better.The infilled wall has obvious constraint on the column,and changes the original failure mode of the column component.The result obtained by using the above numerical simulation method are in good agreement with the experimental results.In view of the great influence of the filled wall on the stress and deformation of the structure,it is inappropriate to treat it as a non-structural component and ignore its effect on the whole structure.