濮阳工学院图书馆结构设计

Structural design of the library of Puyang Institute of Technology

濮阳工学院图书馆是一个平面尺寸为144m×144m的钢-混凝土组合结构,首层架空,竖向支撑结构为四个组合筒体;二层无柱,采用纵、横两个方向间距36m的矩形管桁架作为竖向承重结构,桁架整层通高,最大跨度36m,最长悬挑13.5m;屋面为自由起伏的曲面。介绍了主体结构的方案布置、二层楼面结构设计和曲面屋顶大跨结构的方案比选。论述了结构的不规则程度,设定了抗震性能目标,并针对结构薄弱部位采取了加强措施。采用YJK和MIDASGen软件对结构整体进行了小震、中震分析设计,采用Paco-SAP进行了大震弹塑性分析,得到了构件损伤情况,验证了本结构体系的合理性。进行了结构竖向变形验算和舒适度分析,并通过采取TMD减振措施,减小了长悬挑区的峰值加速度,改善了舒适性指标。

The library of Puyang Institute of Technology is a steel-concrete composite structure with a size of 144m×144m. The first floor is overhead, supported by 4 composite cylinder. There is no column on the second floor. The rectangular pipe truss with a spacing of 36m in the longitudinal and horizontal directions is used as the vertical load-bearing structure. The truss is full height, with a maximum span of 36m and a maximum overhang of 13.5m. The roof is a free undulating surface. The structure system, the structure design of the second floor and the plan comparison of the large-span structure with the curved roof are introduced. The irregularity of the structure is discussed, the seismic performance target is set, and strengthening measures are taken for the weak parts of the structure. During the process of structural design, YJK and MIDAS Gen are used to carry out the analysis of frequently-occurred earthquake and fortification earthquake. Paco-SAP is used for rarely-occurred earthquake elasto-plastic analysis, and the damage of components is obtained, which verifies the rationality of the structural system. The vertical deformation check and comfort analysis of the structure are carried out, and the peak acceleration of the long cantilever area is reduced by adopting TMD vibration reduction measures. The results show that the comfort index is improved.