南昌综合广场大跨度空间异形曲面钢结构拆撑过程仿真研究
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摘要
依托南昌综合广场大跨度空间异形曲面钢结构网壳结构,利用施工力学原理,基于有限元仿真软件MIDAS/Gen建立三维有限元模型,通过对比分析3种不同的拆撑方案,研究该钢结构在拆撑过程中临时支撑反力、应力和位移的变化规律,从而得出最优拆撑方案。并对最优拆撑方案在拆撑过程中的应力比和挠度进行验算,验证了应力比和挠度均满足结构稳定性要求。结果表明,提出的最优拆撑方案可以有效避免钢结构构件应力变化异常及主体结构局部位移过大等现象,可保证钢结构在拆撑过程中的可靠性和安全性。
Based on the long-span spatially shaped special-shaped surface steel structure in Nanchang Comprehensive Square. Using the principle of construction mechanics,a three-dimensional finite element model based on the finite element simulation software MIDAS/Gen was established. Through comparative analysis of three different support removal schemes,the steel structure was studied. During the process,the change laws of reaction force,stress,and displacement were studied,and an optimal unloading scheme was obtained. The stress ratio and deflection of the optimal support removal scheme during the support removal process were checked to verify that both the stress ratio and the deflection could meet the structural stability requirements. The results showed that the optimal support removal scheme proposed in the paper could effectively avoid the phenomenon of abnormal stress variation of steel structural components and local displacement of the main structure,and could ensure the reliability and safety of the steel structure in the support removal process.
Based on the long-span spatially shaped special-shaped surface steel structure in Nanchang Comprehensive Square. Using the principle of construction mechanics,a three-dimensional finite element model based on the finite element simulation software MIDAS/Gen was established. Through comparative analysis of three different support removal schemes,the steel structure was studied. During the process,the change laws of reaction force,stress,and displacement were studied,and an optimal unloading scheme was obtained. The stress ratio and deflection of the optimal support removal scheme during the support removal process were checked to verify that both the stress ratio and the deflection could meet the structural stability requirements. The results showed that the optimal support removal scheme proposed in the paper could effectively avoid the phenomenon of abnormal stress variation of steel structural components and local displacement of the main structure,and could ensure the reliability and safety of the steel structure in the support removal process.
引文
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[12]蒋立,王元清,戴国欣,等.负载下焊接加固钢结构压弯构件受力性能的影响因素分析[J].建筑科学与工程学报,2016,33(5):120-126.
[13]董心德,陈利祥.高抗震设防烈度区大跨度悬挑钢结构观光平台设计[J].建筑结构,2016(增刊1):491-493.
[14]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.
[2]谢小军,陈璇.浅析钢管桁架的体外预应力加固技术[J].钢结构,2016,31(8):63-66.
[3]钟迅,左小青,李治.某大跨度空间钢结构屋面的结构方案选型[J].钢结构,2016,31(9):50-54.
[4]张晓敏,孙勇,陈树建,等.基于动力测试的竖向不规则大跨度空间钢结构抗震性能研究[J].钢结构,2018,33(3):6-10.
[5]韩凌,蒋晓洪,周骁雄,等.大跨度空间钢结构楼面行走式塔式起重机施工技术[J].施工技术,2016,45(11):108-110.
[6]娄峰,范晓伟,董苏洲.惠州体育场钢结构罩棚卸载方案探讨[J].建筑结构,2009(增刊1):105-108.
[7] HAO Y H,LIU Y L,XING Y M,et al. Erosion Wear Surface Morphology and Roughness of Steel Structure Galvanized Coating[J]. China Surface Engineering,2017.
[8]叶飞,张亚旭,左晴,等.武汉大学万林艺术博物馆结构设计[J].建筑结构,2016(7):6-13.
[9]成继红,刘明路,何月峰,等.某大型美术馆钢结构施工关键技术[J].施工技术,2017,46(14):79-82.
[10]何源,宿文姬.联方-凯威特型单层球面网壳结构稳定分析[J].钢结构,2017,32(1):60-63.
[11] ZHANG W,YANG W,QIXIANG W U. Numerical Simulation Analysis of Construction Safety Based on MIDAS/Gen:A Case Study of Construction Process of Local Reformation of a Podium Building Structure[J]. Fujian Architecture&Construction,2018.
[12]蒋立,王元清,戴国欣,等.负载下焊接加固钢结构压弯构件受力性能的影响因素分析[J].建筑科学与工程学报,2016,33(5):120-126.
[13]董心德,陈利祥.高抗震设防烈度区大跨度悬挑钢结构观光平台设计[J].建筑结构,2016(增刊1):491-493.
[14]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.
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