广厦大学图书馆钢桁架悬挂体系结构设计

Structural design of steel truss suspension system of library of Guangsha Vocational and Technical University

广厦大学图书馆采用钢筋混凝土框架-剪力墙结构体系,为满足建筑功能要求,在屋顶设置悬臂钢桁架,悬臂钢桁架端部设置钢吊柱,吊柱与各层楼面钢梁相连,形成悬挂体系。采用YJK和MIDAS Gen软件,对比分析了小震作用及风荷载作用下结构的内力弹性响应、静力弹塑性分析。考虑钢桁架上下弦楼板协同作用,并指定施工顺序进行施工模拟分析,采用ANSYS有限元分析软件对销轴节点进行验算。结果表明:大震作用下,结构具有较高的承载力和较好的延性,结构具有安全性和合理性;销轴节点具有良好的受力性能,应力水平均符合要求;悬挑位置采用钢-混凝土组合楼盖可以缩短工期,提高建筑装配率。

The library of Guangsha Vocational and Technical University adopts reinforced concrete frame-shear wall structure system.In order to meet the functional requirements of the building,the cantilever steel truss is set on the roof,and the steel hanging column is set at the end of the cantilever steel truss.The hanging column is connected with the steel beam of each floor to form a suspension system.The internal force elastic response and static elastic-plastic analysis of the structure under small earthquake and wind load were compared and analyzed by using YJK and MIDAS Gen softwares.Considering the synergistic effect of the upper and lower chord floors of the steel truss,the construction sequence was specified for construction simulation analysis,and pin joint were checked by ANSYS finite element analysis software.The results show that the structure has high bearing capacity and good ductility under the action of large earthquakes,and the structure is safe and reasonable.The pin joint has good mechanical performance,and the stress level meets the requirements.The use of steel-concrete composite floor in cantilever position can shorten the construction period,improve the assembly rate of the building.