基于框-剪结构协同工作的抗振墙数量优化研究

Shear Wall Quantity Optimization on Spatial Interactive Frame-Shear Wall Structure

针对当前抗震墙数量优化中多是定性分析的现状,根据框架-剪力墙结构整体受力特点,采用横向分类方法,将空间框-剪结构分解量化为榀结构形式。基于有限元思想及框剪结构空间协同分析的离散化原理建立了其力学分析模型及剪力墙优化模型,该力学分析模型能较好地反映结构整体工作性能的主要特征及考虑剪力墙剪切变形的影响,动力分析采用振型分解法计算地震作用,以遗传算法作为优化方法确定出了剪力墙的最优数量。计算结果表明该方法具有较高的精度,可为结构的设计提供参考。

Currently, shear wall quantity optimization is mostly analyzed qualitatively. In order to optimize it more exactly, the spatial frame-shear structure was simplified into plane structures by classifying horizontal members according to the integral bearing characteristics of it. Based on the finite element method and principle of discrete analysis on spatial interactive frame-shear wall structure, a mechanics analysis model and an optimization model of shear wall were established. In the mechanics model, the principal work capability was well reflected and the shear deformation was considered, and the seismic action was calculated by using inspiring resolution, In the optimization model, the optimal quantity of shear wall was calculated adopting the popular optimization algorithm-GA（Genetic Algorithm）. The result of calculation is proved to be accurate enough to give reference in structure design.