沣西文化中心剧场结构设计与关键问题研究

Research on structural design and key problems of Fengxi Cultural Center theater

沣西文化中心剧场位于垃圾土填埋区,结构采用钢筋混凝土框架+大跨钢结构网架屋盖组合体系。主体结构及工艺设备承载力和变形需求较高,使用SDDC素土桩进行处理并配合钻孔灌注桩进行设计。为研究下部主体结构与上部72m×72m大跨网架屋盖的整体协同工作性能,采用YJK-A软件建立整体模型进行小震弹性与大震弹塑性时程分析,选取合理弹性球型支座参数保证下部主体结构安全可靠。利用3D3S软件对网架结构进行分析及优化设计,为保证网架结构独立建模设计的安全性,使用MIDAS Gen软件对整体模型进行计算及分析验证。研究结果表明,结构整体设计合理,各项指标满足相应规范要求。

The structure of Fengxi Cultural Center theater located in the waste soil landfill area adopts the combined system of reinforced concrete frame structure and long-span steel structure grid roof. The main structure and process equipment have high bearing capacity and deformation requirements. SDDC plain soil piles were used for treatment and designed in cooperation with bored cast-in-place pile. In order to study the overall cooperative performance of the lower main structure and the upper 72 m×72 m long-span steel structure grid roof, YJK-A software was used to establish the overall model for small earthquakes elastic and large earthquakes elastic-plastic time history analysis, and reasonable elastic spherical bearing parameters were selected to ensure the safety and reliability of the lower main structure. 3 D3 S software was used to analyze and optimize the grid structure. In order to ensure the safety of independent modeling and design of grid structure, MIDAS Gen software was used to calculate, analyze and verify the overall model. The results show that the overall design of the structure is reasonable, and all indexes meet the requirements of the corresponding specifications.