土坡加速度响应的截断效应

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2024-12-01 DOI:10.1016/j.soildyn.2024.109099

Yu-Bing Wang , Xiao-Shi Huang , Chao Li

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引用次数: 0

摘要

为研究地震反应与边坡变形的关系，对脉冲地震动作用下均质砂质边坡进行了动力离心模型试验。首先，分析了边坡的变形特征和动力响应。然后，阐述了与响应截断效应相关的主要特征。随后，引入滑块理论解释了加速度响应截断效应的机理。最后，建立了考虑截尾效应影响的滑动质量动力响应近似计算方法。结果表明，边坡内部和坡面附近响应的变化规律不同，不同方法计算的动力放大系数也存在显著差异。水平响应加速度的截断是由于边坡的相对滑动造成的，截断后的响应在与屈服加速度相关的一个有限值附近波动。

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The truncation effect of soil slope acceleration responses

A dynamic centrifugal model test was conducted for a homogeneous sandy slope under an impulsive ground motion to investigate the relationship between seismic response and slope deformation. Firstly, the deformation characteristics and dynamic responses of the slope were analyzed. Then, the main features associated with the response truncation effect were expounded. Subsequently, the Sliding block theory was introduced to explain the mechanism of the acceleration response truncation effect. At last, an approximate calculation method for the sliding mass dynamic response was developed, considering the influence of the truncation effect. The results show the variation pattern of response differs inside the slope and near the slope surface, and the dynamic amplification coefficients calculated by different methods also exhibit significant variations. The truncation of horizontal response acceleration results from the relative sliding in slope, and the truncated response fluctuates around a limited value related to the yield acceleration.

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.