岩土力学 ›› 2019, Vol. 40 ›› Issue (6): 2163-2171.doi: 10.16285/j.rsm.2018.0297

• 基础理论与实验研究 • 上一篇    下一篇

地基与密肋复合墙结构相互作用系统频域 地震响应试验研究

卢俊龙1，张荫2   

  1. 1. 西安理工大学 土木建筑工程学院，陕西 西安 710048；2. 西安建筑科技大学 土木工程学院，陕西 西安 710055
  • 收稿日期:2018-03-05 出版日期:2019-06-11 发布日期:2019-06-20
  • 作者简介:卢俊龙，男，1978年生，博士，副教授，主要从事工程结构抗震方面的研究工作。
  • 基金资助:
    国家自然科学基金（No.51178385）；陕西省科技统筹创新工程计划项目（No.2016KTZDSF04-04）；陕西省教育厅专项科研计划项目（No.17JK0370）。

Experimental study of the seismic response of the assembled multi-ribbed wall structure-subsoil system in frequency domain

LU Jun-long1, ZHANG Yin2   

  1. 1. School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an, Shaanxi 710048, China; 2. School of Civil Engineering, Xi’an University of Technology and Architecture, Xi’an, Shaanxi 710055, China
  • Received:2018-03-05 Online:2019-06-11 Published:2019-06-20
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51178385), the Shaanxi Province Technology Overall Planning Innovation Project (2016KTZDSF04-04) and the Special Research Projects of Shaanxi Provincial Department of Education(17JK0370).

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摘要： 为研究地震作用下黄土地基与密肋复合墙结构相互作用系统频域地震响应的基本规律，进行了1:15比例结构模型进行振动台试验。输入白噪声、El-Centro波、天津波，测试了结构与地基的动力响应。通过快速傅里叶变化得到频域响应曲线，分析了地基与结构的动力特性以及从7度至9度水平向地震波加载时的动力反应，对比了各加载工况下加速度及位移频域响应曲线，研究了地基、结构频域动力响应的基本规律及其影响因素。结果表明：地震波激励下地基土开裂，自振频率降低，对上部结构的嵌固作用减弱；地基表面与结构顶部加速度响应随烈度的提高而增大，峰值所对应频率的变化显著，地基对加速度的放大效应显著，上部结构对位移的放大效应显著。因此，考虑地基与结构相互作用后，动力放大效应与地基破坏状况及地震动特性密切相关。

关键词: 密肋复合墙结构, 相互作用, 频域响应, 振动台试验

Abstract: In order to study the seismic response of the interaction systems assembled by multi-ribbed composite wall structure and subsoil in frequency domain, a series of shake table tests was carried out using a model scaled in 1/15. The dynamic responses of the structure and subsoil were studied by inputting white noise, El-Centro wave, Tianjin wave in the tests. The response curve was obtained in frequency domain by Fast Fourier Transform, and the dynamic characteristics of the foundation and structure as well as their dynamic responses from 7 degree to 9 degree along horizontal axis loading were analyzed. The frequency response curves of the acceleration and displacement under different loading conditions were comparatively investigated. The dynamic frequency responses of the foundation and structure and their influencing factors were also examined. It was found that the fixing effects of subsoil for the superstructure are lessened, and the vibration frequencies decrease after the subsoil crack affected by the earthquake wave. The acceleration responses are amplified at the subsoil surface and the structure top with increasing the intensity, the frequencies corresponding peak response vary remarkably. The amplification effect of foundation on acceleration is remarkable, and the amplification effect of superstructure on displacement is significant. Therefore, the dynamic amplification effect is closely related to the destruction of subsoil and earthquake ground motion characteristics when considering the interaction between subsoil and structure.

Key words: multi-ribbed wall structure, interactions, dynamic response in frequency domain, shake-table test

中图分类号: 

  • TU311.3
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