考虑应力路径效应的堆石料剪胀方程研究  

Dilatancy equation for rockfill materials considering stress path effect

作　　者：赵勇博 张振东 卞士海 史文龙 ZHAO Yongbo;ZHANG Zhendong;BIAN Shihai;SHI Wenlong(School of Architecture and Transportation Engineering,Ningbo University of Technology,Ningbo 315000,China;School of Civil Engineering,Liaoning Technical University,Fuxin 123000,China;Zhejiang Engineering Survey and Design Institute Group Company Limited,Ningbo 315012,China;Key Laboratory of Reservoir and Dam Safety Ministry of Water Resources,Nanjing 210029,China)

机构地区：[1]宁波工程学院建筑与交通工程学院,浙江宁波315000 [2]辽宁工程技术大学土木工程学院,辽宁阜新123000 [3]浙江省工程勘察设计院集团有限公司,浙江宁波315012 [4]水利部水库大坝安全重点实验室,江苏南京210029

出　　处：《辽宁工程技术大学学报（自然科学版）》2024年第4期479-485,共7页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点研发计划资助项目(2018YFC1508503);水利部水库大坝安全重点实验室开放基金项目(YK321011)。

摘　　要：为揭示堆石料应力路径和剪胀特性相互影响机理,分析了等向压缩试验、常规三轴试验以及等p试验之间的应力应变响应关系。采用理论分析和试验验证的方法,在弹塑性本构模型框架下,提出一种新的考虑应力路径效应的剪胀方程构建方法,并通过多种应力路径堆石料三轴试验对新的剪胀方程进行验证。预测结果表明:构建的剪胀方程可以考虑应力路径的影响,尤其是等应力比加载路径的影响。研究结论揭示了等向压缩试验和等p试验的重要性,建议在建立考虑应力路径影响的剪胀方程和本构模型时利用这两类试验。This paper aims to reveal the inherent interaction mechanism between stress path and dilatancy equation for rockfill materials.The stress-strain response relationships among isotropic compression tests,conventional triaxial tests,and constant p test is analyzed.By employing theoretical analysis and experimental verification methods,a new method for constructing dilatancy equation is proposed within the framework of an elastoplastic constitutive model and was validated through triaxial tests of rockfill materials under various stress paths.The prediction results show that the proposed dilatancy equation can capture stress path effect,especially the effect for constant stress ratio loading paths.The conclusion reveals the importance of isotropic compression tests and constant p-tests.It is suggested to use these two types of tests when establishing dilatancy equation and constitutive model that consider stress path effect.

关 键 词：堆石料 应力路径 剪胀方程 等向压缩试验 等p试验 模型验证 

分 类 号：TV16[水利工程]