长期循环荷载下土的动力学特性与本构模型研究进展  

Review of Dynamic Behaviors and Constitutive Model of Soil Under Long-Term Cyclic Loading

作　　者：李琼林 青于蓝 崔凯[1] 张东杰 李庞举 LI Qionglin;QING Yulan;CUI Kai;ZHANG Dongjie;LI Pangju(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《西南交通大学学报》2024年第2期377-391,共15页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金(52178356,42177128)。

摘　　要：随着交通基础设施的快速发展,长期循环荷载下土体的动力性能与相应的本构模型体系愈发受到关注,其能为该类荷载下地基或者岩土构筑物的动力稳定性和服役性能评估提供理论基础与技术支撑.最近20年来,国内外相关学者已开展了大量的室内试验探索长期循环荷载下土的动力特性与影响因素,建立相应的理论模型描述土体的长期循环变形特征,并努力将其应用于工程实践.目前,对长期循环荷载下土体动力学性能与主要影响因素的研究基本明确,但在如何减少本构模型参数,增强本构模型在变幅值、变频率等复杂实际工况时的适用性等研究尚需进一步加强.本文通过对该方向研究发展的总结,明确了未来的发展方向,并提出了当前研究局限的可能解决思路,有利于进一步推进相关研究成果应用于工程实践的进程.With the rapid development of transport infrastructure,the dynamic properties of soil under long-term cyclic loading and the corresponding constitutive model system are receiving increased attention,which can provide a theoretical basis and technical support for the assessment of the dynamic stability and service performance of foundations or geotechnical structures under such loading.In the past 20 years,Chinese and foreign scholars have carried out a large number of indoor experiments to explore the dynamic behaviors and influencing factors of soil under long-term cyclic loading,established corresponding theoretical models to describe the characteristics of long-term cyclic deformation of soil,and applied them to engineering practice.At present,the research on dynamic performance and the main influencing factors of soil under long-term cyclic loading is sufficient.However,how to reduce the parameters of these constitutive models and enhance their applicability in complex working conditions with variable amplitudes and frequencies needs to be further studied.Through the summary of research development,this paper clarified the development direction of this topic and proposed some possible solutions to the current research limitations,which was beneficial for applying research findings in engineering practice.

关 键 词：长期循环荷载 加载模式 累积应变 动态模量 本构模型 

分 类 号：U461[机械工程—车辆工程] TP308[交通运输工程—载运工具运用工程]