广义应力条件下堆石料的力学特性：真三轴试验和本构模型

IF 5.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-06-02 DOI:10.1007/s11440-025-02662-3

Y. F. Zhou, W. Wu, J. J. Pan, Z. L. Cheng, Y. Z. Zuo

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引用次数: 0

摘要

堆石料是大坝建设中常用的粗颗粒材料，在广义应力条件下表现出复杂的力学性能。在自行研制的大型真三轴试验装置上，采用60 × 30 × 30cm的立方体试件进行了一系列应力路径试验，研究了堆石料的力学特性。分别通过改变平均有效应力、偏离应力和矿脉角进行了3个试验系列。提出了一种描述堆石体性能的弹塑性本构模型。通过考虑相变应力比而不是临界应力比，提出了改进的剪胀方程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Mechanical properties of rockfill under generalized stress conditions: true triaxial testing and constitutive modeling

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Mechanical properties of rockfill under generalized stress conditions: true triaxial testing and constitutive modeling

Rockfill, a coarse granular material commonly used in dam construction, exhibits complex mechanical behavior under generalized stress conditions. This paper investigates the mechanical properties of rockfill through a series of stress-path tests conducted on a self-developed, large-scale true triaxial apparatus with cubical specimens of 60 × 30 × 30cm. Three test series are carried out by varying the mean effective stress, the deviator stress and the Lode’s angle, respectively. An elastoplastic constitutive model is presented to describe the behavior of rockfill. An improved dilatancy equation is introduced by considering the phase transformation stress ratio instead of the critical stress ratio.

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.