天津奥林匹克中心体育场钢结构屋盖施工数值模拟与监测  

Numerical simulation and construction monitoring of the Tianjin Olympic Stadium steel roof structure

作　　者：丁阳[1] 汪明[1] 刘涛[1] 王成博[1] 李忠献[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《建筑结构学报》2008年第5期1-7,共7页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50578109);国家自然科学基金重大研究计划重点资助项目(90715034);教育部新世纪优秀人才支持计划资助项目(NCET-06-0229);天津科技发展计划资助项目(043112111)

摘　　要：对天津奥林匹克中心体育场大型空间钢结构屋盖的主桁架吊装、结构安装过程以及采用不同卸载方式的支撑卸载过程进行数值模拟,并选择部分关键受力构件进行安装过程和卸载过程的应力监测以及结构施工完毕后的温度应力测试。结果表明,钢结构安装过程中构件应力很小,方案合理;根据数值模拟结果并结合现场施工条件确定的间隔跳跃等值同步卸载方式切实可行,支撑卸载过程中各支撑上作用力稳步均匀下降,钢结构内力增加平缓,结构逐渐趋于设计受力状态;日照导致结构杆件温度分布不均匀,部分杆件产生较大温度应力;均匀温度变化条件下结构产生的温度应力较小,且与计算值相符。The construction processes which include the hoisting of the main Girders, the assembling of the structure and the unloading of bracing system by different methods of the Tianjin Olympic Stadium, a long-span spatial steel structure, were numerically simulated. The stresses in some key members were monitored in the assembling and unloading processes, and the temperature stresses were measured after the construction. The result shows that stresses in the members were very small in the assembling process, and the scheme is feasible. Based on the numerical simulation results along with the field construction conditions, interval multi-stage equivalent sync-unloading method was adopted. In the unloading process of bracing system, the forces applied to the bracing system were decreasing steadily. Whereas, the internal forces in the steel structure were increasing gently and driving to the designed state. There were rather large stresses in some of the members since the inhomogeneous distribution of temperature brought by s t. In members with homogeneous temperature distribution there were smaller stresses which could be predicted reasonably well.

关 键 词：大型空间钢结构 施工 数值模拟 监测 支撑卸载 温度应力 

分 类 号：TU393.31[建筑科学—结构工程] TU318