江苏大剧院戏剧厅临时支撑提前卸载方案研究
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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。
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.
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.
引文
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[4] 田黎敏,郝际平,方敏勇,等.提前卸载临时支撑对大跨度空间结构施工过程的影响分析[J].建筑钢结构进展,2013,15(2):52-57.
[5] 李正华,邱小军,周元,等.大悬挑结构临时支撑卸载施工技术[J].建筑钢结构进展,2012,14(5):59-64.
[6] 孙学水,陈凡,刘坚,等.超高层悬挂钢结构临时支撑卸载分析[J].建筑钢结构进展,2016,18(3):63-68.
[7] 陈绍游.大跨度钢箱梁的制作与分段吊装技术研究与应用[D].重庆:重庆大学,2005.
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