基于量纲分析的相邻多个建筑地震下单双边碰撞反应研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (23) : 134-143.

论文

基于量纲分析的相邻多个建筑地震下单双边碰撞反应研究

蒋姗1，张富伟1，刘庆华2，翟长海3

作者信息 +

Dimensional analysis of uni-lateral pounding between adjacent buildings during earthquakes

JIANG Shan1, ZHANG Fuwei1, LIU Qinghua2, ZHAI Changhai3

Author information +

文章历史 +

摘要

结构地震碰撞反应与相邻结构特性及地震动特性均密切相关，在众多参数影响下，以往的研究工作出现了很多不一致甚至相互冲突的研究结论。因此，结构地震碰撞研究的首要困难在于解决大量参数的影响。量纲分析方法可有效解决参数复杂性问题。本文采用量纲分析方法研究一排多个相邻建筑的碰撞反应，基于接触单元法模拟接触过程的力、变形和能量耗散，通过合理的无量纲参数清晰地表达碰撞反应规律；对比分析了相邻建筑单、双边碰撞作用以及结构布局对结构碰撞反应的影响。研究结果表明：与单边碰撞反应相比，双边碰撞作用使质量刚度较小结构的位移和速度反应明显降低；中间结构质量刚度较大、两侧结构质量刚度较小时，结构间产生的双边碰撞力峰值最大，远大于单边碰撞产生的碰撞力。

Abstract

The structural pounding response is closely related to the characteristics of adjacent structures and ground motion. Under the influence of many parameters, many inconsistent and even conflicting conclusions have been produced in previous studies. Therefore, the primary difficulty of structural seismic impact research is to solve the influence of a large number of parameters. The dimensional analysis method can effectively solve this problem. In this paper, dimensional analysis method is used to study the collision response of adjacent buildings in a row. Based on the contact element method, the force, deformation and energy dissipation during the contact process are simulated, and the collision response law is clearly expressed through reasonable dimensionless parameters. The influence of the unilateral and bilateral impact in different structural layout is analyzed. The results show that the response of the flexible structure is significantly reduced by bilateral impact compared with unilateral impact; When the middle structure has a larger mass and stiffness, the pounding force is the largest, which is much larger than that in unilateral impact case.

导出引用

蒋姗1, 张富伟1, 刘庆华2, 翟长海3. 基于量纲分析的相邻多个建筑地震下单双边碰撞反应研究[J]. 振动与冲击, 2024, 43(23): 134-143

JIANG Shan1, ZHANG Fuwei1, LIU Qinghua2, ZHAI Changhai3. Dimensional analysis of uni-lateral pounding between adjacent buildings during earthquakes[J]. Journal of Vibration and Shock, 2024, 43(23): 134-143

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