采矿与安全工程学报Issue(5)：744-747,4.
红砂岩单轴压缩蠕变试验及模型研究
Uniaxial compressive creep test of red sandstone and its constitutive model
摘要
Abstract
In this paper, to study the creep properties of red sandstone, the uniaxial compressive creep test was carried out. Based on the test results, a non-linear visco-elastic-plastic creep model was estab-lished, and the parameters of the model were identified by using the nonlinear optimization algorithm of BFGS. The results show that red sandstone has obvious creep characteristics, and the model can better reflect the creep behaviors of instantaneous loading strain, decay creep, steady creep and accelerating creep, etc. Finally, the non-linear visco-elastic-plastic creep model was fruther developed by using FLAC3D simulation software, and the uniaxial creep numerical simulation of red sandstone was carried out. The creep curves of numerical simulation and experimental results were comparative analyzed, and the practicability of non-linear visco-elastic-plastic creep model was verified.关键词
红砂岩/蠕变/蠕变模型/数值模拟Key words
red sandstone/creep/creep model/numerical simulation分类
建筑与水利引用本文复制引用
赵宝云,刘东燕,郑颖人,刘洪..红砂岩单轴压缩蠕变试验及模型研究[J].采矿与安全工程学报,2013,(5):744-747,4.基金项目
重庆大学山地城镇建设与新技术教育部重点实验室访问学者基金项目；国家自然科学基金项目(41302223)；重庆市科委基础与前言研究计划项目(CSTC2013jcyjA90004，CSTC2010BB7334)；中国石油科技创新基金项目(2010D_5006_0210) （41302223）
