加筋土整体式桥地震反应研究

申大为, 徐明, 刘鹏飞

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申大为, 徐明, 刘鹏飞. 加筋土整体式桥地震反应研究[J]. 工程力学, 2018, 35(10): 135-143. DOI: 10.6052/j.issn.1000-4750.2017.07.0538
引用本文: 申大为, 徐明, 刘鹏飞. 加筋土整体式桥地震反应研究[J]. 工程力学, 2018, 35(10): 135-143. DOI: 10.6052/j.issn.1000-4750.2017.07.0538
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SHEN Da-wei, XU Ming, LIU Peng-fei. ANALYSIS OF THE SEISMIC RESPONSE OF GEOSYNTHETIC-REINFORCED SOIL INTEGRAL BRIDGE ABUTMENTS[J]. Engineering Mechanics, 2018, 35(10): 135-143. DOI: 10.6052/j.issn.1000-4750.2017.07.0538
Citation: SHEN Da-wei, XU Ming, LIU Peng-fei. ANALYSIS OF THE SEISMIC RESPONSE OF GEOSYNTHETIC-REINFORCED SOIL INTEGRAL BRIDGE ABUTMENTS[J]. Engineering Mechanics, 2018, 35(10): 135-143. DOI: 10.6052/j.issn.1000-4750.2017.07.0538
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加筋土整体式桥地震反应研究

  • 清华大学土木工程系, 北京 100084

基金项目: 国家自然科学基金项目（41272280）；国家973计划项目（2014CB047003）
详细信息
    作者简介:

    申大为(1991-),男,河北人,博士生,主要从事地下工程方面的研究(E-mail:sdw13@mails.tsinghua.edu.cn);刘鹏飞(1989-),男,河南人,硕士生,主要从事地下工程方面的研究(E-mail:thuliupf08@163.com).

    通讯作者:

    徐明(1974-),男,湖北人,副教授,博士,博导,主要从事岩土力学和地下工程的教学及研究(E-mail:mingxu@tsinghua.edu.cn).

  • 中图分类号: U442.5+5

ANALYSIS OF THE SEISMIC RESPONSE OF GEOSYNTHETIC-REINFORCED SOIL INTEGRAL BRIDGE ABUTMENTS

  • Department of Civil Engineering, Tsinghua University, Beijing 100084, China

摘要

    摘要
  • 摘要: 加筋土整体式桥结合了整体式桥和加筋土的优点，是一种新型的桥梁形式，但目前对加筋土整体式桥的动力响应还很缺乏认识。该文对典型的单跨加筋土整体式桥的地震反应进行数值模拟，分析了地震峰值加速度对桥台弯矩、位移、筋材拉力的影响，并对比了另外3种桥型(整体式桥、加筋土简支梁桥、简支梁桥)在地震作用下桥台弯矩、位移和筋材拉力分布的区别。研究结果表明，地震作用下，简支梁桥台水平位移很大，有发生“落梁”的危险，整体式桥的水平位移更小，且加筋土整体式桥相比其他3种桥型抗震稳定性最高；地震时桥台弯矩和筋材拉力均显著增大；静力时每层筋材的最大拉力一般在筋材端部，而地震时是在筋材内部回填土滑移面附近。
    Abstract: The geosynthetic-reinforced soil integral bridge combines the advantages of the integral bridge and geosynthetic-reinforced soil. However, there is great uncertainty about the dynamic response of this kind of new bridges. This paper presents the findings from a series of dynamic numerical simulations about the geosynthetic-reinforced soil integral bridges (IB-GRS) and compares the dynamic performance with three other types of bridges-the integral bridge (IB), geosynthetic-reinforced soil conventional bridge (CB-GRS) and simply supported bridge (CB). The results show that during an earthquake, the horizontal displacement of CB and CB-GRS is so large that the girder might collapse, while the horizontal displacement of IB and IB-GRS is much smaller. The IB-GRS bridge has the highest dynamic stability among the four bridge types. During the earthquake, the abutment bending moment and the axial force of geosynthetic layers have a remarkable increment. In the seismic process, the maximum axial force of each geosynthetic layer is found to take place inside the reinforcement across the slip plane of backfill, not at the end of the reinforcement near the abutment.
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    • 参考文献(32)
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出版历程
  • 收稿日期:  2017-07-12
  • 修回日期:  2018-01-01
  • 刊出日期:  2018-10-28

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    LIU Peng-fei

    • Department of Civil Engineering, Tsinghua University, Beijing 100084, China

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