Time-dependent tests on intact rocks in uniaxial compression

被引：247

作者：

Li, YS ^{[1
]}

Xia, CC ^{[1
]}

机构：

[1] Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai 200092, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES | 2000年 / 37卷 / 03期

关键词：

Compression testing - Creep testing - Strain rate - Mathematical models;

D O I：

10.1016/S1365-1609(99)00073-8

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The influence of strain history on rock specimen deformation during multi-level loading and unloading cyclic uniaxial compression creep tests is studied with a creep testing machine. An experimental data processing method for such creep tests is suggested. The correction formulas to determine the rheological model parameters are derived for the case when load relaxation is considered. Creep and relaxation tests under uniaxial compression on four types of rocks are conducted using an electronic hydraulic servo-controlled stiff testing machine. The creep and relaxation laws of the different rocks are compared. The complete stress-strain curves for red sandstone specimens are obtained at nine strain rates from 2.43 x 10(-6) to 4.38 x 10(-3)/s. The effects of strain rates on rock strength and limit strain are discussed. Empirical equations to evaluate the strain rate dependence of rock mechanical properties are presented. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：467 / 475

页数：9