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首页 > 过刊浏览>2023年第51卷第1期 >16-22. DOI:10.11908/j.issn.0253-374x.21574
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砂土液化后液-固相变机理的单元试验与模拟
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作者:
作者单位:

1.中南大学 土木工程学院，湖南 长沙 410018;2.同济大学 土木工程学院，上海 200092

作者简介:

倪雪倩（1992—），女，讲师，工学博士，主要研究方向为岩土地震工程。 E-mail： nixueqian@csu.edu.cn

通讯作者:

叶 斌（1977—），男，教授，博士生导师，工学博士，主要研究方向为地震灾害机理与防控。 E-mail： yebin@tongji.edu.cn

中图分类号:

TU441

基金项目:

国家自然科学基金（52208379， 41977225）


Mechanical Behavior and Theoretical Simulation of Post-Liquefied Sand in Fluid-Solid Transition Process
Author:
Affiliation:

1.School of Civil Engineering， Central South University， Changsha 410018， China;2.College of Civil Engineering， Tongji University， Shanghai 200092， China

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    摘要:

    液化后砂土流动是一个涉及液相向固相转化的过程。针对目前常规三轴加载模式在进行松砂液化后性质研究中存在局限性的现状，提出应力与应变控制相结合的加载方法，获取初始液化状态，开展液化后松散土体流态化性质研究。基于试验结果，引入液?固相变参数，耦合流体本构与固体本构关系，建立可统一描述液化后土体应力应变关系的经验模型，实现不同密实度条件下砂土液化后液?固相变转化全过程力学行为的模拟。

    Abstract:

    Post-liquefied sand flow involves a phase transition process from fluid to solid. To overcome the limitation of normal triaxial loading mode for loose sand， a two-staged loading method， stress- and strain-controlled loading， was applied to obtain the initial liquefaction state and investigate the mechanical behavior in the post-liquefaction process. Based on test results， a fluid-solid transition parameter was proposed to combine solid and fluid constitutive models. Finally， the stress-strain relation of post-liquefied sand was established to simulate the fluid-solid transition process at different relative densities.

    参考文献
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倪雪倩,叶斌.砂土液化后液-固相变机理的单元试验与模拟[J].同济大学学报(自然科学版),2023,51(1):16~22

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  • 收稿日期:2021-12-10
  • 在线发布日期: 2023-02-02
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