考虑应力路径效应的堆石料剪胀方程研究.

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. [ABSTRACT FROM AUTHOR]