行人不同步频下连体结构舒适度分析

Comfort Analysis of Connected Structures under Different Pedestrian Frequency

由于连体结构的连接部位跨度较大,且端部悬挑,在行人荷载下易产生较大的竖向振动,设计时舒适度问题成为重点关注对象。针对该连体结构的振动舒适度问题,通过有限元软件MidasGen建立了整体模型,以IABSE单人荷载为基础,利用MATLAB随机数命令模拟随机行人荷载,通过多点输入不同行人荷载对该连体结构进行了人行舒适度分析,提取了楼面的竖向加速度云图。分析结果表明,该连体结构的竖向加速度响应未超过舒适度限值要求,其具有适宜的舒适性。

As the span of the connecting parts with connected structures is large and its end part is cantilevered,large vertical vibration can be generated under the pedestrian load,so that comfort in design should be considered. The whole finite element model was established by Midas software,random pedestrian load was simulated by MATLAB Software,the pedestrian comfort of the connected structure is analyzed by multi-point input of different pedestrian loads,the vertical acceleration cloud images were provided to judge floor comfort. The results show that the vertical acceleration response of the conjoined structure does not exceed the comfort limit,and it’s comfortable.