某城楼大跨度钢-混凝土叠合板组合楼盖振动舒适度研究

以某城楼大跨度楼盖为工程背景,开展了钢-混凝土叠合板组合楼盖振动舒适度评估研究.首先通过现场动力特性测试获得的楼盖结构一阶竖向动力特性,校核了建立的整体结构精细化有限元模型,然后仿真分析得到了楼盖受单人行走、多人行走以及单人跳跃等多种激励的动力响应,最后开展了楼盖振动舒适度评价.结果 表明:该新型楼盖结构竖向刚度整体较...

Study on vibration serviceability of a large-span steel-concrete composite floor in a city gate

The vibration serviceability evaluation of a steel-concrete composite floor was carried out based on a large-span floor in a city gate. Firstly, the sophisticated finite element model of the whole structure was verified according to the first vertical dynamic mode of the floor structure, which was derived from a field measurement. Then, the dynamic response of the floor, which was motivated by single walking, multi-person walking and single jumping, was obtained by numerical analysis. Finally, vibration serviceability evaluation of the floor was carried out. The research conclusions are as follows. The new type floor structure has larger vertical whole stiffness and better vibration serviceability. The concrete composite slab can be equivalent to a whole slab element and the decorative surface can be simulated by increasing the thickness of the slab based on the equivalent principle of stiffness and mass for in the finite element simulation. Furthermore, the connection between the steel beam and the concrete slab can be seen as rigid joint in the finite element model. The results can be used as reference for vibration serviceability evaluation and sophisticated finite element modeling of the similar floor.