质心与刚度中心偏离的空间结构设计分析探讨  

Structural Design Analysis for Spatial Structure with Eccentricity between Mass Center and Stiffness Center

作　　者：薛加烨 舒赣平[1] 董磊[1] 俞建刚[2] 

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]江苏省交通规划设计院股份有限公司,江苏南京210005

出　　处：《江苏建筑》2014年第1期30-34,共5页Jiangsu Construction

摘　　要：质心与刚度中心偏离将使空间结构产生扭转效应,若偏离过大对结构的抗风抗震极为不利。某工程根据建筑造型奇特轻盈的要求采用斜拉网格结构,针对该工程中遇到的结构质心与刚度中心严重偏离问题,通过结构分析与计算,找出影响结构整体特性的主要结构构件,优化结构布置,对预应力拉索的布置和预应力大小的选择进行讨论,对关键节点构造作了介绍。The eccentricity between mass center and stiffness center produces torsion effect on spatial structure. Excessive eccentricity leads to a significant adverse influence of the wind resistant and quake proof performance of the structure. Cable-stayed reticulated structure is applied on a project according to the uniqueness and lightness in architectural shape. Facing the extreme eccentricity between the mass center and stiffness center, structural members which have major impact on the characteristics of structures is find out and structure layout is optimized through structure analysis and calculation. The arrangement of prestressed cables and the magnitude of the prestress are discussed. A brief introduction to the key connections is also included in the paper.

关 键 词：刚度中心 网格结构 管桁架 型钢混凝土 

分 类 号：TU378.6[建筑科学—结构工程]