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（1 南京長(zhǎng)江都市建筑設(shè)計(jì)股份有限公司， 南京 210002； 2 河海大學(xué)土木與交通學(xué)院， 南京 210098；3深圳市建筑設(shè)計(jì)研究總院有限公司， 深圳 518031； 4江蘇滬寧鋼機(jī)股份有限公司， 宜興 214231）

［摘要］以江蘇大劇院戲劇廳鋼結(jié)構(gòu)施工安裝為工程背景，提出了三種臨時(shí)支撐提前卸載方案，包括單向逐次卸載方案、雙向交替卸載方案及雙向交叉卸載方案。采用MIDAS/Gen有限元軟件對(duì)三種方案進(jìn)行模擬計(jì)算，與常用的合攏后一次卸載方案的結(jié)構(gòu)內(nèi)力和變形計(jì)算結(jié)果進(jìn)行對(duì)比分析。通過分析可知，單向逐次卸載方案存在合攏后主體結(jié)構(gòu)應(yīng)力較大的缺點(diǎn)，且卸載過程中臨時(shí)支撐受力較大，穩(wěn)定性保障較差；采用雙向交替卸載方案時(shí)，卸載過程中結(jié)構(gòu)受力控制合理，但結(jié)構(gòu)存在較大變形；而采用雙向交叉卸載方案時(shí)，結(jié)構(gòu)受力性能最好，并且臨時(shí)支撐用鋼量可大幅度減少，綜合性能最佳。

［關(guān)鍵詞］大跨度鋼結(jié)構(gòu)； 臨時(shí)支撐； 提前卸載； 施工模擬

中圖分類號(hào)：TU391, TU758-11文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

作者簡(jiǎn)介：王昌彤，碩士，助理工程師，Email:1021tongtong0210@sina.com。