（1 南京长江都市建筑设计股份有限公司， 南京 210002； 2 河海大学土木与交通学院， 南京 210098；3深圳市建筑设计研究总院有限公司， 深圳 518031； 4江苏沪宁钢机股份有限公司， 宜兴 214231）

［摘要］以江苏大剧院戏剧厅钢结构施工安装为工程背景，提出了三种临时支撑提前卸载方案，包括单向逐次卸载方案、双向交替卸载方案及双向交叉卸载方案。采用MIDAS/Gen有限元软件对三种方案进行模拟计算，与常用的合拢后一次卸载方案的结构内力和变形计算结果进行对比分析。通过分析可知，单向逐次卸载方案存在合拢后主体结构应力较大的缺点，且卸载过程中临时支撑受力较大，稳定性保障较差；采用双向交替卸载方案时，卸载过程中结构受力控制合理，但结构存在较大变形；而采用双向交叉卸载方案时，结构受力性能最好，并且临时支撑用钢量可大幅度减少，综合性能最佳。

［关键词］大跨度钢结构； 临时支撑； 提前卸载； 施工模拟

中图分类号：TU391, TU758-11文献标识码：A文章编号：1002-848X(2019)14-0018-05

Research on the unloading of temporary supports in advance of Theater Hall in Jiangsu Grand Theater

Wang Changtong1， Cao Pingzhou2， Li De3，  Fu Xinzhi4， Wu Wenping4

（1 Nanjing Yangtze River Urban Architecture Design Co., Ltd.， Nanjing 210002, China; 2 College of Civil and Transportation Engineering, Hohai University， Nanjing 210098, China; 3 Shenzhen Architectural Design Research Co., Ltd.， Shenzhen 518031， China; 4 Jiangsu Huning Steel Mechanism Co., Ltd.， Yixing 214231， China）

Abstract:Based on the engineering background of the steel structure construction of the theater of Jiangsu Grand Theatre, three  unloading schemes  of  temporary support in advance were proposed, including the unidirectional successive unloading scheme, the bidirectional alternate unloading scheme and the bidirectional cross unloading scheme. The MIDAS/Gen finite element software was used to simulate the three schemes, and the internal force and deformation calculation results of the common unloading scheme  after the healing were compared. It shows that the unidirectional successive unloading scheme has the disadvantage of large stress of the main structure after healing, and the temporary support force is large during the unloading process, and the stability guarantee is poor. The structural force control during the unloading process is reasonable when the bidirectional alternate unloading scheme was adopted, but the structure has large deformation. When the bidirectional cross unloading scheme was adopted, the structural stress performance is the best, and the amount of steel for temporary support can be greatly reduced, and the comprehensive performance is optimal.

Keywords:large-span steel structure; temporary support; unloading in advance; construction simulation

作者简介：王昌彤，硕士，助理工程师，Email:1021tongtong0210@sina.com。