建筑结构显式拟静力推覆分析方法研究

Research on explicit quasi-static Push-Over analysis of building structures

基于结构的精细化非线性有限元模型和显式拟静力求解方法,提出了结构拟静力推覆分析方法(EQPA);为控制结构惯性效应,给出了加载模式和基于能量的评价方法。在自主研发的CPU+GPU并行有限元软件中开发实现EQPA,可有效克服大规模复杂结构隐式Push-Over分析中计算量大和收敛性差的问题。使用EQPA对某超高层剪力墙结构的抗震性能进行分析,并与三组人工地震动的简化动力增量分析(sIDA)对比。结果表明,EQPA的结构惯性效应得到有效抑制;EQPA耗时仅为sIDA耗时的4.97%;两种分析方法的结果有一定差异,但两者的结构能力谱曲线、层间变形规律、薄弱楼层和构件损伤规律较为接近。

Based on the refined nonlinear finite element model of a structure and the explicit quasi-static solution method,the explicit quasi-static Push-Over analysis method(EQPA)was proposed.In order to suppress the inertia effect of the structure,the loading mode and evaluation method based on energy were given.EQPA was developed in CPU+GPU parallel finite element software.EQPA can effectively overcome the problem of computing scale and convergence in implicit Push-Over analysis of large-scale complex structures.The seismic performance of a super high-rise shear wall structure was analyzed by using EQPA in this paper,and the results of EQPA were compared with the simplified incremental dynamic analysis(sIDA)of three groups of artificial ground motions.The results showed that the structural inertia effect of EQPA was effectively suppressed;The computation time of EQPA was only 4.97%of sIDA;There were some differences between the results of EQPA and sIDA,but the performance curve,inter-storey deformation pattern,the weak storey and the component damage of EQPA were close to the results of sIDA.