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冰川冻土 ›› 2020, Vol. 42 ›› Issue (4): 1213-1219.doi: 10.7522/j.issn.1000-0240.2020.0100

• 寒区工程与灾害 • 上一篇    下一篇

考虑冻土效应的桥梁桩-土动力相互作用研究现状与展望

王万平1(), 张熙胤1,2(), 陈兴冲1, 王义1, 于生生1   

  1. 1.兰州交通大学 土木工程学院,甘肃 兰州 730070
    2.中国科学院 西北生态环境资源研究院 冻土工程国家重点实验室,甘肃 兰州 730000
  • 收稿日期:2019-06-21 修回日期:2020-07-15 出版日期:2020-12-31 发布日期:2021-01-21
  • 通讯作者: 张熙胤 E-mail:2786689150@qq.com;zhangxiyin@mail.lzjtu.cn
  • 作者简介:王万平(1994 - ), 男, 甘肃会宁人, 2018年在烟台大学获学士学位, 现为兰州交通大学在读硕士研究生, 从事寒区桥梁抗震研究. E-mail: 2786689150@qq.com
  • 基金资助:
    国家自然科学基金项目(51808273);中国博士后科学基金面上项目(2018M643767);兰州交通大学“天佑青年托举人才计划”项目(张熙胤);冻土工程国家重点实验室开放基金项目(SKLFSE201912)

Study on dynamic interaction between bridge pile and soil with permafrost effect: status and review

Wanping WANG1(), Xiyin ZHANG1,2(), Xingchong CHEN1, Yi WANG1, Shengsheng YU1   

  1. 1.School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China
    2.State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
  • Received:2019-06-21 Revised:2020-07-15 Online:2020-12-31 Published:2021-01-21
  • Contact: Xiyin ZHANG E-mail:2786689150@qq.com;zhangxiyin@mail.lzjtu.cn

摘要:

冻土和地震是我国西部高寒高烈度地区桥梁工程建设中主要面临的两大挑战。冻土区线路工程广泛采用桩基础桥梁, 土体冻结后会显著影响地震作用下桩-土动力相互作用过程, 给桩基础桥梁抗震分析带来困难。首先系统总结和分析了冻土对桥梁结构地震响应的影响、 桩-冻土相互作用效应及其计算模型等方面的研究现状, 进而对相关成果进行了科学分析。研究表明: 冻土的存在对桥梁结构地震反应的影响是显著的, 桩基础桥梁抗震设计中不考虑冻土效应是不合理的。目前还存在的问题包括: 冻土区桥梁结构地震反应的研究中, 未充分考虑冻土效应; 现有桩-土相互作用模型无法有效应用于冻土领域; 地震作用下桩-冻土体系相互作用机理及其破坏特征不明确。在此基础上, 提出了考虑冻土效应后桥梁桩-土动力相互作用为今后需要重点研究的方向。

关键词: 冻土区, 桥梁结构, 桩-土动力相互作用, 地震反应

Abstract:

permafrost (frozen soil) and earthquake are two major challenges for the bridge construction in cold regions with high earthquake intensity in western China. Especially to the widely applied bridges with pile-foundation, the permafrost will significantly affect the pile-soil dynamic interaction process under the earthquake action, and bring difficulties to the seismic analysis. Previous studies have shown that the presence of permafrost had a significant impact on the seismic response of bridge structures, and it was unreasonable without considering the effect of permafrost in the seismic design of pile foundation bridges. It is reviewed that the effect on seismic response of bridges, frozen soil-pile interaction effect and its calculation model and so on. It is unreasonable that not to consider permafrost effect on seismic design of bridge with pile foundation. The problems in current researches are: (1) soil freezing effect has not been fully considered in the research of the bridge seismic response in frozen regions; (2) the existing pile-soil interaction model is rarely applied in permafrost; (3) the interaction mechanism and destroy characteristics of pile-soil system under earthquake are not clear. Based on these situations, some proposals are put forward for future researches.

Key words: permafrost region, bridge structure, pile-soil dynamic interaction, seismic response

中图分类号: 

  • TU445