（中国建筑标准设计研究院， 北京 100048）

［摘要］大跨度钢桁架屋盖的竖向自振频率一般较低，在其下悬吊部分楼层，将导致较大的人行激励反应，不能满足建筑舒适度的要求。从一个实际工程案例出发，研究了大跨度悬吊钢结构楼盖舒适度的三个问题：舒适度标准、人致荷载的定义、TMD解决方案。选取了ISO 2631-2舒适度标准和工程上简化的人致荷载定义，考虑多种荷载工况下结构采用TMD减振前后的加速度反应。分析结果表明，TMD方案能够使结构在人致荷载下的振动大幅度减小，并满足舒适度要求。同时通过竖向地震时程分析，表明TMD系统对竖向地震具有减震作用。

［关键词］大跨度钢结构屋盖； 悬吊结构； 人致荷载； 振动控制； TMD

中图分类号：TU351文献标识码：A文章编号：1002-848X(2016)19-0051-06

Study on human comfort of suspended floor under large-span steel truss roof

Lu Lei， Lei Yuande， Yu Yinquan， Bu Fanjie， Wu Xiaofeng

(China Institute of Building Standard Design & Research,  Beijing 100048,  China)

Abstract:The large-span steel truss roof generally has a low vertical natural vibration frequency. The floor partly suspended under the roof leads to a large human-induced excitation,  which fails to meet the building comfort requirement. From a practical engineering case,  three problems of the comfort of large-span suspended steel structure floor were studied,  including the acceptance criteria for human comfort,  human-induced load definition and tuned mass damper（TMD）solutions. The ISO 2631-2 comfort standard and the definition of the simplified human-induced load in engineering were selected,  and the acceleration responses of the structure before and after usage of TMD for seismic reduction were considered under different load conditions. The analysis results show that the TMD scheme can greatly reduce the vibration of the structure under the human-induced load and satisfy the comfort degree requirement. Vertical seismic time-history analysis indicates that the TMD system has a damping effect on the vertical earthquake.

Keywords:large-span steel structure roof; suspended structure; human-induced excitation; vibration control; TMD

作者简介：卢雷，硕士，高级工程师，一级注册结构工程师，Email: leiyd07@163.com。