异形柱-短肢剪力墙结构在不同地震作用角度下的抗震性能研究

Research on seismic behavior of RC frame of short-limb shear wall structure with special-shaped columns under different direction of horizontal seismic loading

由于钢筋混凝土异形柱截面几何性质的独特性,需要考虑不同地震作用下结构的反应。运用大型有限元分析软件ANSYS,对一栋12层小高层住宅在0°角和45°角的水平地震作用下进行模态分析、反应谱分析以及设防烈度下的时程分析,研究了钢筋混凝土异形柱-短肢剪力墙结构的动力特性和抗震能力。结果表明,异形柱方向性较强,在不同的地震作用方向下的受力有较大差异,在一定的剪力墙刚度保证下,结构依旧能在设防烈度下处于弹性工作阶段。

Due to the particularity of geometric property of reinforced concrete special-shaped cross-section,structure response in different horizontal seismic directions should be taken into account. The dynamic characteristics and earthquake resistant abilities of the RC frame of short-pier shear wall structure with special-shaped columns in a 12-storey small high-rise residential building under the horizontal seismic loading in the directions of 0 degree and 45 degree are studied in this paper by making modal analysis,response spectrum analysis and time-history through finite-element method analytical software ANSYS. The results show that,the special-column has strong direction,different columns under the different loading direction have a obvious difference,on condition of the enough stiffness of shear-wall,structure can still work in the elastic stage under the fortification intensity.