（清华大学建筑设计研究院有限公司，　北京 100084）

［摘要］两侧塔楼之间有索网幕墙的连体结构的连体桁架需满足两侧塔楼变形协调的刚度要求，并为预应力索网提供有效支承。连体桁架水平刚度对整体结构动力特性的影响较竖向刚度更显著。模态和反应谱分析表明，整体结构地震响应分析可不考虑单层预应力索网的作用；需计算单层预应力索网在罕遇地震作用下的变形和内力，以保证预应力索不出现拉断或松弛的失效状况。

［关键词］连体结构； 连体桁架； 动力特性； 单层预应力索网； 地震响应；  时程分析

中图分类号：TU318文献标识码：A文章编号：1002-848X(2018)24-0041-06

Structural scheme selection of connected truss and seismic response analysis of curtain wall cable net in connected structure

Cui Juan, Yang Xiao, Jiang Bingli, Wang Li, Shen Minjie

(Architectural Design and Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China)

Abstract:The connected truss of the connected structure with cable net curtains between the towers on both sides needs to meet the rigidity requirements of the deformation coordination of the towers on both sides, and provides effective support for the prestressed cable net. The horizontal stiffness of the connected truss has a more significant effect on the dynamic characteristics of the overall structure than the vertical stiffness. The modal and response spectrum analyses show that the seismic response analysis of the whole structure can neglect the role of the single-layer prestressed cable net; the deformation and internal force of the single-layer prestressed cable net under the rare earthquake should be calculated to ensure that the prestressed cable does not appear breakage or slack failure condition.

Keywords:connected structure; connected truss; dynamic characteristic; single-layer prestressed cable net; seismic response;   time-history analysis

作者简介：崔娟，硕士，工程师，一级注册结构工程师，Email：adstruc@vip.163.com。