钢管混凝土组合异形柱框剪结构的抗震研究

Research on seismic performance of specially-shaped column composed of concrete-filled steel tubes frame-shear structures

钢管混凝土组合异形柱框架剪力墙结构是一种新型混合结构体系,该体系应用于高层钢结构住宅.主要研究在钢管混凝土组合异形柱框架剪力墙结构上加偏心支撑,改变偏心支撑的耗能梁段对结构进行时程分析,分析比较结构的位移、位移角、剪力、顶点加速度时程曲线变化.探索偏心支撑的不同耗能梁段对结构的抗震影响.探索外框架和剪力墙承担剪力的大小,判定该结构能否形成双重抗震结构体系.当A形支撑耗能梁段取剪切屈服型时,结构的抗震性能最好,结构刚度大、剪力分配均匀并形成双重抗震结构.该结构体系有着广阔的发展前景,目前国内对该体系的抗震性能研究还处于空白阶段,故对该结构进行抗震性能分析具有重要意义.

The specially-shaped column composed of concrete-filled steel tubes frame-shear wall structure used in high-rise steel residential buildings is a new hybrid structure.This paper mainly studies the specially-shaped column composed of concrete-filled steel tubes frame shear wall structure with eccentric support,the change of the link beam eccentric support on the structure of time history analysis,comparing the structures of displacement,displacement angle,shear and vertex acceleration.To explore the effect of different energy dissipation beam segments with eccentric braces on the seismic response of structures,it studies the outer frame and the shear wall,assumes the shear force,and determines whether the structure can form a double side structure system.It is found that using shear yielding mechanism to simulate the A-type eccentrically braces link beam can get a best resistant-seismic behavior,and the whole structure has the advantage of higher stiffness,reasonable shear distribution,and form dual seismic structure.At present,the research on seismic performance of this system in China is still in the blank stage,therefore,it is very important to analysis of the performance.