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ISSN 2096-7780 CN 10-1665/P

沈欣茹, 周正华. 不同墩高的矩形单肢薄壁空心墩动力特性的数值模拟 [J]. 地震科学进展, 2021, (4): 169-177. doi: 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank" class="mainColor"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003.
引用本文: 沈欣茹, 周正华. 不同墩高的矩形单肢薄壁空心墩动力特性的数值模拟 [J]. 地震科学进展, 2021, (4): 169-177. doi: 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank" class="mainColor"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003.
Xinru Shen, Zhenghua Zhou. Numerical simulation of dynamic characteristics of rectangular single leg thin-wall hollow piers with different pier heights [J]. Progress in Earthquake Sciences, 2021, (4): 169-177. doi: 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank" class="mainColor"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003.
Citation: Xinru Shen, Zhenghua Zhou. Numerical simulation of dynamic characteristics of rectangular single leg thin-wall hollow piers with different pier heights [J]. Progress in Earthquake Sciences, 2021, (4): 169-177. doi: 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank" class="mainColor"> 10.3969/j.issn.2096-7780.2021.04.003" target="_blank"> 10.3969/j.issn.2096-7780.2021.04.003.

不同墩高的矩形单肢薄壁空心墩动力特性的数值模拟

Numerical simulation of dynamic characteristics of rectangular single leg thin-wall hollow piers with different pier heights

  • 摘要: 首先介绍研究高低墩特性的目的及意义,并对国内外关于高低墩动静力特性的研究现状进行概述;然后借助有限元软件ABAQUS建立5种不同高度的桥墩模型,并对其分别进行模态分析,提取其自振频率以及振型,分析其自振特点,再沿两个方向分别输入3组不同的地震动,对比分析结构的位移和加速度响应。研究表明:对于同一阶模态,桥墩高度的减小会导致其自振频率呈现增大的趋势;桥墩高度的变化会对较高阶振型产生影响;桥墩高度的减小可以显著减小结构的位移和加速度响应;地震动输入的不同带来的结构的位移响应和加速度响应的差异十分显著。

     

    Abstract: Firstly, this paper introduces the purpose and significance of studying the characteristics of high and low piers, and summarizes the research status of dynamic and static characteristics of high and low piers at home and abroad. Then, five kinds of pier models with different heights are established with the aid of the finite element software ABAQUS. Modal analysis is carried out, the natural frequency and mode shape are extracted, the characteristics of natural vibration are analyzed, and three different groups of ground motions are input along the two directions respectively. The displacement and acceleration response of the structure are compared and analyzed. The results show that: for the same mode, with the decrease of pier height, the natural frequency will increase and the change of pier height affects the higher mode. The decrease of pier height can significantly reduce the displacement and acceleration response of the structure. The difference of displacement and acceleration response of the structure caused by different seismic input is significant.

     

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