§3.3.2 目标位移的求解.......................................................................................38
§3.4 水平侧向力分布模式......................................................................................43
§3.5 平面不规则钢结构改进的水平侧向力分布模式..........................................46
§3.5.1 概述...........................................................................................................46
§3.5.2 楼层的质量中心、刚度中心及偏心矩...................................................47
§3.5.3 平面不规则钢结构改进的水平侧向力分布...........................................47
§3.6 算例..................................................................................................................49
§3.6.1 结构非线性模型.......................................................................................49
§3.6.2 非线性时程分析.......................................................................................50
§3.6.3 地震波的选取...........................................................................................51
§3.6.4 有限元模型建立.......................................................................................53
§3.6.5 Pushover分析结果....................................................................................54
§3.6.6 与时程分析结果比较...............................................................................56
§3.7 本章小结..........................................................................................................57
第四章 平面不规则钢结构改进能力谱法...................................................................59
§4.1 概述..................................................................................................................59
§4.2 本文建议的等效SDOF体系简化方法...........................................................61
§4.2.1 等效振型与等效振型参与系数...............................................................61
§4.2.2 等效质量...................................................................................................62
§4.2.3 等效位移与等效基底剪力.......................................................................62
§4.2.4 理论分析曲线折线化...............................................................................63
§4.2.5 等效周期...................................................................................................65
§4.2.6 等效阻尼比...............................................................................................66
§4.3 结构能力谱曲线..............................................................................................67
§4.4 结构需求谱曲线..............................................................................................68
§4.4.1 等效阻尼比弹性需求谱曲线...................................................................68
§4.4.2 弹塑性需求谱曲线...................................................................................70
§4.5 本文改进的能力谱法......................................................................................70
§4.5.1 目标位移的确定.......................................................................................70
§4.5.2 改进能力谱法的计算步骤.......................................................................71
§4.6 算例..................................................................................................................73
§4.6.1 计算结果...................................................................................................73
§4.6.2 与时程分析结果比较...............................................................................74
§4.7 本章小结..........................................................................................................75
第五章 平面不规则钢结构基于性能抗震设计方法...................................................76
§5.1 概述..................................................................................................................76
§5.2 平面不规则钢结构基于性能的抗震设计方法..............................................77
§5.2.1 结构概念设计...........................................................................................78
§5.2.2 结构性能水平的确定和抗震性能目标的优化决策...............................78
§5.2.3 结构的非线性分析...................................................................................80