钢框架支撑体系抗震性能对比分析

Comparison of Seismic Performances of Braced Steel Frame Systems

论文利用工程有限元软件ETABS对普通中心支撑钢框架和屈曲约束支撑钢框架的抗震性能进行对比,分析了两者分别在EL-Centro波和天津波作用下的各楼层层间位移角最大值、顶层加速度时程曲线和基底剪力时程曲线的数据。所得结果表明:与普通支撑相比,屈曲约束支撑不仅可以很好的提高框架的刚度,还具有非常优秀的吸能和耗能作用。

This paper compared the seismic performance of the ordinary braced steel frame with that of the buckling restrained braced steel frame by making use of the engineering finite element soft- ware ETABS. It analyzed the maximum story displacement angles, the top--level acceleration time curves and the base shear time curves of both the ordinary braced frame and the buckling restrained braced steel frame under the EL-Centro earthquake waves and the Tianjin waves. The results showed that compared with the ordinary brace the buckling restrained brace not only can increase the stiffness of the frame but also has better energy absorptions. As a result, the buckling restrained brace can greatly reduce the displacement of frame, thus improving the seismic performance of the structure.