摘要
上海嘉定文博苑项目的博物馆建筑造型新颖,结构形式特殊。在100m×100m的平面范围内仅由四个核心筒和少量的剪力墙落地,通过连接剪力墙的大跨度钢桁架及钢梁形成楼面体系。本文分析了结构在竖向荷载作用下的内力与位移,通过合理设计关键构件截面及连接节点保证受力性能。分析了大跨度楼面在人行荷载激励下的加速度响应,在整体竖向振动自振振型的振幅最大处桁架下弦安装调谐质量阻尼器(TMD)能显著减小竖向振动的加速度峰值,使之满足规范要求。对结构在罕遇地震作用下进行弹塑性分析,剪力墙仅有局部部位出现中轻度损伤,型钢梁、型钢柱、钢桁架大震下均处于弹性工作阶段,结构整体抗震性能良好。
The museum of Jiading Wenbo Garden,Shanghai has a novel architectural modeling and special structural form.In a plane of 100 m×100 m,there are only four concrete core tubes and a few shear walls.The floor system is formed by large-span trusses and steel beams connected by shear walls.In this paper,the internal forces and displacements of the structure under vertical loads were analyzed.By rationally designing the key components and connection nodes,the safety of the structure can be ensured.The acceleration response of the long-span floor under pedestrian loads was studied.Installing a tuned mass damper(TMD)on the lower chord of the truss at the maximum amplitude can significantly reduce the peak acceleration of the vertical vibration and make it meet the specification requirements.According to the elastic-plastic analysis of the structure,some parts of the shear walls are slightly to moderately damaged in a rare earthquake.Under a major earthquake,the steel beams,steel columns and steel trusses are all in the elastic working stage,and the overall structure has good seismic performance.
作者
朱铁城
Zhu Tiecheng(East China Architectural Design and Research Institute Co.,Ltd.,Shanghai 200002,China)
出处
《特种结构》
2021年第2期51-57,共7页
Special Structures
关键词
博物馆结构
大跨度桁架
楼板舒适度分析
调谐质量阻尼器
弹塑性分析
Museum structure
Large-span truss
Floor comfortability analysis
Tuned mass damper(TMD)
Elastic-plastic analysis
