单向壁式框架剪力墙结构抗震性能的动力时程分析

Dynamic Time History Analysis on Seismic Performance of Unidirectional Shear Wall Frame Structure

含有壁式框架的剪力墙结构在结构设计中应用广泛。为了研究框架比例和房屋高度对剪力墙抗震性能的影响,本文利用EPDA建筑结构弹塑性动力分析软件,对不同房屋高度、不同单向壁式框架比例的剪力墙结构进行罕遇地震下弹塑性动力时程分析,并对弹塑性层位移分布、层间位移角分布、最大位移角时刻结构裂缝分布情况等抗震性能指标进行了对比分析。结果表明:随着壁式框架比例的逐渐增大,结构的变形形态由弯曲型过渡到弯剪型,最后趋近于剪切型;楼层层间剪力逐渐减小,最大位移角时刻的裂缝数量增多,位置逐渐下移且主要集中在连梁及底部墙肢上。上述结论在剪力墙结构设计中,对控制壁式框架数量和房屋高度具有参考意义。

Shear wall structure containing wall frame is widely used in structure design. This paper studies the influence of wall frame ratio and building height on the seismic performance of shear wall structure. By using software EPDA, dynamic elastic-plastic time history analysis was carried out under severe earthquake on different building heights and different unidirectional wall frame ratios of shear wall structure. Comparing and analyzing also investigated by indictors such as displacement distribution, interlayer displacement Angle distribution, the structural fracture distribution situation at the maximum displacement angle moment and so on. The research results show that with the percentage of wall frame gradually increasing, deformation of the structure form by the transition to the curved bending shear type tend to shear in the end. Shear of floor layers decreases, the number of fracture of displacement Angle moment increases, position gradually moves down and focuses on even the beam and the bottom wall limb. The above conclusion has reference significance to the controlling of the amount of wall frame and building height in the design of the shear wall structure.