一个基于砾质土的改进椭圆-抛物双屈服面模型  

A modified ellipse-parabola double yield surfaces model on gravelly soil

作　　者：陈志波[1] 朱俊高[2] 

机构地区：[1]福州大学环境与资源学院,地质工程福建省高校工程研究中心,国土资源部丘陵山地地质灾害防治重点实验室,福建福州350116 [2]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《福州大学学报（自然科学版）》2016年第6期874-880,共7页Journal of Fuzhou University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41102167);福州大学科技发展基金资助项目(2011-XQ-12)

摘　　要：针对椭圆-抛物双屈服面模型,对其屈服面的硬化准则及其对砾质土的适用性进行分析和讨论,在此基础上,对椭圆-抛物双屈服面模型进行改进,采用幂函数关系式反映椭圆屈服面的硬化准则,并对抛物屈服面的屈服方程进行修改.采用改进的双屈服面模型对砾质土三轴试验的应力应变曲线进行模拟验证,模拟表明,改进的椭圆-抛物双屈服面模型更好地反映了砾质土的应力应变特性.Based on the ellipse-parabola double yield surfaces model,the hardening criterion of the model and its applicability for gravel soil were analyzed and discussed,then a modified double yield surfaces model is proposed. The modified model takes a power function relation as the hardening rule of the elliptical yield surface,and the yield equation of the parabolic yield surface is also modified. The stress and strain curves of triaxial tests on gravelly soil were simulated by the modified model,the simulation results show that,the experimental results of gravelly soil can be better predicted by the modified model.

关 键 词：砾质土 土石坝 心墙料 应力应变关系 本构模型 双屈服面模型 

分 类 号：TU43[建筑科学—岩土工程]