装配式混凝土楼板在人群荷载下的激励研究

Study on the Excitation of Assembled Concrete Floor under the Load of the Crowd

为研究装配式混凝土楼板在人群荷载作用下的激励研究,文章从单人落足、连续行走、竖向跳跃三种激励模式,对该种装配式楼板在12种工况下竖向加速度响应进行了试验和有限元分析。分析表明,该种装配式混凝土楼板的舒适度满足规范要求,竖向加速度试验结果和有限元结果吻合度较好,所有工况均小于美国ATC指南及《高层建筑混凝土结构技术规程》(JGJ3-2010)规定的限值,五人跑动和五人跳跃定点激励产生的加速度明显大于其他工况产生的加速度,因此应该避免该类楼板上多人跑动和多人同时跳跃情况的发生。

In order to study the excitation research of assembled concrete floor under crowd load,the three acceleration models like single walk,continuous walking and vertical jump were studied.The vertical acceleration responses of the fabricated floor under 12 working conditions were tested and analyzed by finite element method.The analysis shows that the comfort of prefabricated concrete floor can meet the requirements of specification;vertical acceleration test results are highly coincident with finite element results;all the conditions are less than the limits of ATC guidelines and＂technical specification for concrete structures of tall building＂（JGJ3-2010）in the United States;acceleration point by five persons＇ running or jumping is significantly than the incentive on the other conditions.Therefore,it should be avoided for many people to run and jump at the same time on this kind of floor.