高强配筋剪力墙框剪结构的地震行为研究

在框剪结构的剪力墙中配置高强钢筋可以显著提高其安全储备,使剪力墙在框架之后屈服,并改变地震剪力的分配规律。本文利用MSC.Marc 2005以及清华大学在MSC.Marc基础上开发的混凝土纤维模型程序THUFIBER和适用于剪力墙结构非线性分析的分层壳墙单元模型,对高强配筋及普通配筋的两个8层钢筋混凝土框剪结构进行了静力推覆分析和三种实际地震波作用下的动力时程分析,重点研究了高强钢筋对框剪结构抗震性能控制的效果。研究结果表明,剪力墙中采用高强钢筋配筋后,改变了剪力墙和框架的刚度退化规律,提高了剪力墙的屈服强度,且同时具有较好的极限变形能力,可以有效提高整个结构的安全储备,对结构抗震是有利的。

Study on the Seismic Performance of Frame-shear Wall Structures with High-strength Reinforced the Shear Wall

High strength steel reinforcement in the shear walls of frame-shear wall structures can efficiently increase the safety margin and change the seismic force distribution because the shear wall will yield after the frame.With the fiber model program THUFIBER and the multi-layer-shell program,which are developed by Tsinghua University and are based on the general purpose finite element software of MSC.MARC,two 8-story reinforced concrete frame-shear wall structures,whose shear wall are reinforced with normal and high strength steel respectively,are studied with static pushover and dynamic analysis.The effect of high strength steel in the shear wall to the control of seismic performance of the structures is emphasized.The results show that with high strength steel in the shear wall,the softening behaviors of frame and shear wall are changed.The yield strength of the shear wall is increased while it still has the same the deformation capacity.And the safety margin of the whole structure is efficiently increased which benefits the seismic capacity of the structure.