中国第二历史档案馆新馆项目主楼结构设计

Structural design of the main structure of the New Secondary Historical Archives of China

中国第二历史档案馆新馆项目,主楼平面尺寸约94m×94m,建筑高度41.1m,主体结构采用型钢混凝土柱、钢筋混凝土梁框架结构体系。分别采用YJK和MIDAS Building两种软件进行结构多遇地震下反应的分析计算,并对计算结果进行对比;采用YJK软件对主楼结构进行小震弹性时程分析,选取5条天然波及2条人工波,通过时程分析得到的基底反力、层间位移角与反应谱分析结果接近,且满足规范限值要求,主楼结构没有明显薄弱层;采用YJK软件进行主楼结构中震作用下计算复核,框架柱满足中震不屈服承载力要求;采用YJK软件进行了静力弹塑性时程分析,根据分析结果,通过在框架柱中设置型钢,结构具有足够塑性变形能力,能够较好地发挥耗能能力,满足“大震不倒”的设防目标。

The main structure of the New Secondary Historical Archives of China has a plan size of about 94m×94m and a building height of 41.1m. It adopts a frame structure system of profiled steel concrete columns and reinforced concrete beams. YJK and MIDAS Building are used to analyze and calculate the response of the structure under frequent earthquakes, and the calculation results are compared. YJK is used to analyze the small earthquake elastic time history of the main building structure. 5 natural waves and 2 artificial waves are selected. The base reaction force and interlayer displacement obtained by the time history analysis are close to the results of the response spectrum analysis, and meet the requirements of the specification limit. It meets the requirements of non-yield bearing capacity under medium earthquakes. YJK is used to carry out a static elastic-plastic time history analysis. According to the analysis results, the structure has sufficient plastic deformation capacity by setting steel in the frame columns, and can better exert energy dissipation capacity and satisfy the fortification goal of “not to fall in a big earthquake”.