工程力学 ›› 2019, Vol. 36 ›› Issue (12): 62-68.doi: 10.6052/j.issn.1000-4750.2018.10.0574

• 土木工程学科 • 上一篇    下一篇

阶梯地形成层场地的斜入射地震动输入方法

赵密1, 孙文达1, 高志懂1, 黄景琦2, 杜修力1   

  1. 1. 北京工业大学城市与工程安全减灾教育部重点实验室, 北京 100124;
    2. 北京科技大学土木与资源工程学院, 北京 100083
  • 收稿日期:2018-10-28 修回日期:2019-01-20 出版日期:2019-12-25 发布日期:2019-05-18
  • 通讯作者: 赵密(1980-),男,吉林人,教授,博士,主要从事重大工程抗震研究(E-mail:zhaomi@bjut.edu.cn). E-mail:zhaomi@bjut.edu.cn
  • 作者简介:孙文达(1992-),男,吉林人,硕士生,主要从事重大工程抗震研究(E-mail:s201604078@emails.bjut.edu.cn);高志懂(1992-),男,山东人,博士生,主要从事重大工程抗震研究(E-mail:gaozhidong@emails.bjut.edu.cn);黄景琦(1988-),男,安徽人,讲师,博士,主要从事岩体隧道等地下结构抗震性能研究(E-mail:huangjingqi11@163.com);杜修力(1963-),男,四川人,教授,博士,主要从事地震工程学研究工作(E-mail:duxiuli@bjut.edu.cn).
  • 基金资助:
    国家973项目(2015CB057902);国家自然科学基金项目(51678015,51421005,51738001)

INPUT METHOD OF OBLIQUELY INCIDENT EARTHQUAKE FOR STEP-SHAPED LAYERED SITE

ZHAO Mi1, SUN Wen-da1, GAO Zhi-dong1, HUANG Jing-qi2, DU Xiu-li1   

  1. 1. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China;
    2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2018-10-28 Revised:2019-01-20 Online:2019-12-25 Published:2019-05-18

摘要: 基于黏性边界和地震动斜入射时水平成层场地反应算法,发展了一种阶梯地形成层场地的斜入射地震动输入方法,即两个侧面人工边界处采用各自高度水平成层场地的自由场反应作为输入,底面人工边界处采用入射波场作为输入。由于该方法是近似地震动输入方法,分析了人工边界位置、输入地震动、地震动入射角度、地表斜坡倾角及场地分层特性变化对该方法精度的影响。结果表明,平面SV地震波输入条件下,针对该文研究的各种工况,地表最大位移峰值误差均小于5%,说明提出的斜入射地震动输入方法精度较高,可用于阶梯地形成层场地的地震反应分析。

关键词: 场地反应分析, 地震动斜入射, 阶梯地形, 成层介质, 黏性边界

Abstract: An input method of obliquely incident earthquake for a layered site with step-shaped topography is developed based on the viscous boundary and the horizontal layered site response analysis method under obliquely incident earthquake. The input wave fields at lateral boundaries are the free field responses of a horizontal layered site. Each lateral boundary uses the site with identical parameters as a lateral boundary, and therefore two lateral boundaries use the different site models. The input wave field at the bottom boundary is an incident wave field. Because above treatments, the input method is approximate. The factors affecting the accuracy of the method have been discussed, such as boundary location, inputted earthquake, the angle of incidence, slope inclination, and layered media. The results indicate that the peak error of displacement is less than 5% for all kinds of cases studied in this paper under the SV wave. The accuracy of the proposed input method of obliquely incidence earthquake satisfies the engineering requirements, and the method can be used for seismic response analysis of a step-shaped topography site.

Key words: site response analysis, obliquely incidence earthquake, step-shaped topography, layered media, viscous boundary

中图分类号: 

  • TU435
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