某大跨试验厅结构设计与屋盖施工分析

Structural design and roof construction analysis of a large-span test hall

某试验厅的计算跨度为119. 8m,为单层单跨建筑,其屋盖采用张弦梁结构,屋盖下部支撑为型钢混凝土柱,整体为框排架结构。采用两种不同模型的结构计算软件MIDAS Gen(v8. 00)和SAP2000(v14. 1. 0)对整体结构进行了对比计算分析,并结合结构性能化设计要求,介绍了张弦梁的设计要点,给出了弹塑性时程分析和抗连续倒塌等分析结果,最后对屋盖滑移施工方案进行了介绍。证明了结构体系的安全性、合理性,并对大跨屋盖的施工提出了技术依据。

The calculation span of a test hall is 119. 8 m,which is a single-story and single-span building. The roof of the test hall is a beam string structure,which is supported by steel reinforced concrete columns,and the whole structure is a frame bent structure. Two structural calculation programs MIDAS Gen( v8. 00) and SAP2000( v14. 1. 0) with different models were used to compare and analyze the whole structure. Combined with the structural performance-based design requirements,the design points of the beam string structure were introduced. The analysis results of elastic-plastic time-history analysis and anti-progressive collapse were given. Finally,the roof slip construction scheme was introduced.The safety and rationality of the structural system were verified and the technical basis for the construction of the large-span roof was put forward.