步行荷载激励下大跨度楼盖加速度反应谱分析

发布时间：2018-02-11 00:48

本文关键词： 大跨度楼盖加速度反应谱有限元分析标准行人激励　出处：《江苏大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：首先介绍了运用数值分析方法研究加速度反应谱的基本思路,并指出该方法的不足;然后针对加速度是楼盖人致振动控制和舒适度评价的重要指标,采用APDL建立大跨度楼盖在标准行人激励下的有限元计算模型,对不同自振频率的楼盖模型进行动力时程分析,得到楼盖的最大加速度反应谱曲线;最后分析了测点位置、阻尼、跨度及行人数量对楼盖加速度的影响,与部分学者推荐的研究结果进行比较分析.结果表明:有限元分析方法可以消除数值分析时用挠曲函数代替横向位移反应产生的误差;该方法解决了用第1振型加速度响应代替结构的加速度响应,导致预测的结构振动响应结果偏小的问题.
[Abstract]:This paper first introduces the basic idea of using numerical analysis method to study acceleration response spectrum, and points out the shortcomings of this method, and then points out that acceleration is an important index of floor floor vibration control and comfort evaluation. The finite element model of long-span floor under standard pedestrian excitation is established by using APDL. The dynamic time-history analysis of the floor model with different natural vibration frequencies is carried out, and the maximum acceleration response spectrum curve of the floor is obtained. The effects of span and pedestrian number on the acceleration of floor are compared with the results recommended by some scholars. The results show that the finite element analysis method can eliminate the error caused by the deflection function instead of the lateral displacement response in numerical analysis. This method solves the problem that the acceleration response of the structure is replaced by the acceleration response of the first vibration mode, which leads to the smaller response result of the predicted vibration response of the structure.
【作者单位】：江苏大学后勤管理处;江苏大学土木工程与力学学院;
【基金】：国家自然科学基金资助项目(51408267) 江苏省高校自然科学研究项目(14KJB560005)
【分类号】：TU31

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