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针对大跨度钢结构施工过程中较为复杂的受力问题,以哈尔滨某滑雪场工程为例,对其钢桁架屋盖进行施工过程模拟分析,研究了由施工产生的附加应力对杆件的影响;利用有限元方法,分析提升吊具的强度和刚度;通过多尺度有限元法,探究提升吊点的受力性能。结果表明:在考虑了不同步效应的提升施工中,被提升结构的杆件强度能够满足要求;提升架在提升反力等荷载作用下,能够满足设计要求;由于附加应力的存在,需对不满足承载力要求的杆件进行替换;提升吊具和吊点均满足设计要求。分析中多个计算参数的选择,具有较高的准确性,对同类工程分析研究有借鉴意义。
Aiming at the more complicated stress problem in the construction process of large-span steel structure, the construction process of the steel truss roof is simulated and analyzed with a skiing project in Harbin as an example, and the influence of additional stress caused by the construction on the members is studied. The strength and rigidity of the spreader were analyzed by using the finite element method. The multi-scale finite element method was used to investigate the mechanical properties of the lifting point. The results show that the strength of the members of the structure to be lifted can meet the requirements in the hoisting construction considering the non-synchronizing effect. The lifting frame can meet the design requirements under the action of the lifting reaction force and so on. Due to the additional stress, Meet the requirements of carrying capacity of the rod to be replaced; to enhance the spreader and hanging point to meet the design requirements. The choice of multiple calculation parameters in the analysis has high accuracy and is of great significance to the analysis and research of similar projects.