弱连体结构抗震设计方法在虹桥综合交通枢纽工程中的应用

连体结构加剧了结构在地震作用下的受力复杂性，属不规则结构。以上海虹桥综合交通枢纽为工程背景，介绍了弱连体结构抗震设计方法在工程中的应用，并基于LS-DYNA程序开发了用于结构弹塑性时程分析的梁柱纤维单元，通过构件数值滞回加载与试验结果的比较，验证了梁柱纤维单元的适用性。采用多质点层模型进行粘滞阻尼器参数优化分析，并采用整体结构弹塑性模型进行罕遇地震作用计算，评价阻尼器参数设计的合理性和弱连体结构的抗震性能。分析结果表明：该工程弱连接设计是可行的，结构满足抗震性能要求。

Application of seismic design method of weakly connected structure in Hongqiao Communication Junction

Connected structure is one of irregular structures which result in complicated seismic design.As a case study of the Shanghai Hongqiao Communication Junction,the application of weakly connected structure is introduced,and a serious of beam-column fiber elements in elasto-plastic time history procedure are explored based on LS-DYNA as well as its applicability is verified by numerical cycle loading of members compared to experiments.Multiple-mass-point model is adopted for optimal design of viscous dampers,a...