人行激励下大跨度楼盖结构舒适度分析和振动控制

发布时间：2018-01-06 22:47

本文关键词：人行激励下大跨度楼盖结构舒适度分析和振动控制　出处：《青岛理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着经济的快速发展,城市建设的步伐越来越快,一些大跨度建筑结构不断出现,例如大型体育场馆,人行天桥等。大跨度结构的质量轻、刚度大、自振频率小,在人行激励作用下的振动问题渐渐受到人们的重视,当外部激励频率与结构自振频率相近时容易激发共振。将TMD装置应用到结构中来减小振动效应是恰当好处的办法。本文以某体育场为研究对象,研究大跨度楼盖结构在人行激励作用下的竖向振动舒适度和振动控制问题,主要的工作如下： 1.总结对比前人对人行激励模型和相应舒适度的研究成果,选取最适合本工程实际情况的人行走、跑步、跳跃激励模型和舒适度评价标准。 2.将人行、跑步、跳跃激励模型施加在楼盖结构上计算结构动力效应,和相应舒适度标准进行对比。 3.对楼盖结构施加TMD阻尼器,以位移和加速度作为对比对象,通过不断优化TMD的阻尼、刚度参数控制减振效果；改变TMD的布置方案计算最优减振效果。对比施加TMD前后结构的振动情况,证明安装TMD之后楼盖的减振效果满足舒适度的要求。
[Abstract]:With the rapid development of economy, the pace of urban construction is getting faster and faster, and some long-span building structures appear constantly, such as large stadiums, footbridges and so on. Since the natural vibration frequency is small, people pay more and more attention to the vibration problem under the action of pedestrian excitation. It is easy to excite resonance when the external excitation frequency is close to the natural frequency of the structure. It is an appropriate method to reduce the vibration effect by applying the TMD device to the structure. In this paper, a stadium is taken as the research object. The problems of vertical vibration comfort and vibration control of long-span floor structure under pedestrian excitation are studied. The main work is as follows: 1. To summarize and compare the previous research results of pedestrian incentive model and corresponding comfort degree, select the most suitable for the actual situation of the project people walking, running, jumping incentive model and comfort evaluation criteria. 2. The excitation model of pedestrian, running and jumping is applied to the floor structure to calculate the dynamic effect of the structure, and the corresponding comfort criterion is compared. 3. Apply TMD damper to floor structure, take displacement and acceleration as the contrast object, through continuously optimize the damping of TMD, the stiffness parameter controls the damping effect; By changing the layout of TMD to calculate the optimal damping effect, comparing the vibration of the structure before and after the application of TMD, it is proved that the damping effect of floor after installing TMD meets the requirement of comfort.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU311.3;TU352.1

【参考文献】