【摘要】 为研究悬挂式巨型钢框架-预应力复合支撑体系的结构性能,基于工程实际,建立该体系的三维空间模型,运用非线性有限元方法对该结构进行了竖载静力分析、风载静力分析、模态分析以及地震动时程分析,结果表明,新型复合支撑有效改善了巨型梁的竖载受力性能;水平荷载作用下体系侧移曲线总体呈弯曲型,层间侧移曲线则呈现周期性变化;体系存在密集模态成组及特征相似模态成对现象;附加阻尼有效降低了体系地震动反应,还有效克服了悬挂端位移太大的问题。更多还原

【Abstract】 In order to study structural performance of mega-suspended steel frame and composite brace structure with additional damper,based on practical projects,three-dimensional model of the new structure was established,and static analysis under vertical and horizontal load,modal analysis and seismic time-history analysis were presented with finite element method considering geometric nonlinearity.The results indicated that prestressed composite brace can improve mechanical performance of mega beam under vertical static load.The lateral displacement curve of the structure under horizontal wind incurvated.The phenomenon of modal group is evident.Additional damper can effectively decrease the responses induced by earthquake,and the lateral displacement of suspended substructure,as well.更多还原