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利用有限元软件SAP 2000,采用“串并联多质点体系”振动模型,对多维地震作用下的钢筋混凝土框架结构进行了弹性时程分析,通过改变底层柱截面尺寸,研究了不同的底层柱刚度对框架结构在多维地震作用下抗震性能的影响.研究结果表明,多维地震作用下,底层柱刚度在一定变化范围内增大,层间剪力和层间加速度等逐渐变大,但是层间位移和楼层顶点位移逐渐变小.
By using finite element software SAP2000, the elastic time history analysis of reinforced concrete frame structure under multi-dimensional seismic action is carried out using “series-parallel multi-particle system ” vibration model. By changing the size of the bottom column section, Stiffness on the seismic behavior of the frame structure under multi-dimensional earthquake.The results show that under the action of multi-dimensional earthquake, the stiffness of the bottom column increases within a certain range of variation and the interlaminar shear force and acceleration between layers gradually become larger, but the interlayer Displacement and floor vertex displacement gradually smaller.