文章摘要
刘爱娟,崔玉龙,刘铁新.考虑动态临界加速度的地震边坡永久位移预测模型研究[J].地震工程学报,2021,43(2):445-452. LIU Aijuan,CUI Yulong,LIU Tiexin.A Prediction Model for Permanent Displacement of Seismic Slopes Considering Dynamic Critical Acceleration[J].China Earthquake Engineering Journal,2021,43(2):445-452.
考虑动态临界加速度的地震边坡永久位移预测模型研究
A Prediction Model for Permanent Displacement of Seismic Slopes Considering Dynamic Critical Acceleration
投稿时间:2018-07-20  
DOI:10.3969/j.issn.1000-0844.2021.02.445
中文关键词: Newmark永久位移;动态临界加速度;永久位移预测模型;地震边坡
英文关键词: Newmark permanent displacement;dynamic critical acceleration;prediction model of permanent displacement;seismic slope
基金项目:国家自然科学基金资助项目(41807267);安徽省高校自然科学研究项目(KJ2020ZD34,KJ2017A094)
作者单位E-mail
刘爱娟 中国长江三峡集团有限公司, 北京 100038  
崔玉龙 安徽理工大学土木建筑学院, 安徽 淮南 232001 ylcui@aust.edu.cn 
刘铁新 大连海事大学土木工程系, 辽宁 大连 116026  
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中文摘要:
      在区域边坡地震危险性评价中主要采用永久位移预测模型进行地震边坡永久位移计算。永久位移预测模型以Newmark滑块理论为基础,通过大量实测地震时程记录统计拟合得出。针对Newmark理论中滑动面抗剪强度参数保持不变和已有位移预测模型的计算位移小于实测位移的问题,利用动态临界加速度理论,分别构建含有峰值加速度和阿里亚斯强度的两种位移预测模型。对该模型计算出的永久位移合理性进行讨论,发现永久位移计算结果符合滑坡实测位移的数量级。采用本文模型计算的永久位移更加接近地震滑坡位移实际大小,可以解决一直存在的预测位移小于实测位移的问题。在更进一步讨论发展的基础上,本文模型可满足更多的理论应用和工程实际,为区域边坡地震危险性评价提供思路。
英文摘要:
      The prediction model of permanent displacement, mainly used to calculate permanent displacement of seismic slope in hazard assessment of regional seismic slope, is based on the Newmark sliding theory, and is obtained by statistical fitting of a large number of measured seismic acceleration records. Aiming at the problem of the shear strength parameters of a sliding surface remaining unchanged in the Newmark theory, and the calculated displacement from the existing prediction model of permanent displacement being less than the measured displacement, two prediction models of displacement, including peak acceleration and Arias intensity, are established using the theory of dynamic critical acceleration. The rationality of the permanent displacement calculated by the model is discussed. It was found that the permanent displacement calculated by the proposed model is close to the actual displacement of an earthquake landslide. The model can solve the present problem wherein the predicted displacement is less than the measured displacement. On the basis of further discussion and development, this model can meet more theoretical applications in engineering practice, and provide new ideas for seismic risk assessment of regional slopes.
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