【摘要】 采用大型有限元软件ANSYS对巨型框架结构进行了动力时程分析,讨论了不同主次框架刚度比下巨型框架结构的动力特性及地震响应。计算结果表明,钢筋混凝土巨型框架在地震作用下的侧移曲线为弯剪型;主次框架刚度比对巨型框架弹性地震反应有较大影响;结构的高阶频率对结构有一定影响,当与地震波卓越周期相近时可能会发生类共振现象。计算结果对巨型框架结构的抗震设计有较大的参考价值。更多还原

【Abstract】 Using the ANSYS finite element software,it was conducted a dynamic time-history analysis of a mega-frame structure.The dynamic characteristics and the seismic responses of the mega-frame structure are discussed in detail.The calculated results show that the displacement curve of reinforced concrete mega-frame structures is a type of flexure-shear.The stiffness ratio of the major and the minor frames is an important factor which has a carger influence on the elastic seismic response of the mega-frame structure.The higher order frequency of the structure has a certain influence on the structure,when it is close to the earthquake wave predominant period,a pseudo-resonance phenomenon may oceur.The calculation results may be a useful refernce for the design of earthquake resistance of mega-frames.更多还原