高温状态下泥岩单轴蠕变特性及损伤本构关系研究  

Creep properties and damage constitutive relation of mudstone under uniaxial compression at high temperature

作　　者：茅献彪[1] 张连英[1,2] 刘瑞雪[1] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]徐州工程学院土木学院,江苏徐州221008

出　　处：《岩土工程学报》2013年第S2期30-37,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51074166;51104128);江苏省产学研前瞻性联合研究项目(BY2012085);博士点基金项目(20120095110013);住房和城乡建设部科学技术项目(2011-K3-5);江苏省"青蓝工程"项目;江苏省高校自然科学研究项目(11KJD130002)

摘　　要：采用美国MTS810电液伺服材料试验机和其配套的MTS652.02高温环境炉试验系统,对常温及700℃高温状态下泥岩进行了分级加载蠕变试验的研究,得到了相应的蠕变曲线,给出了泥岩蠕变经验方程,并初步建立了考虑温度效应的泥岩蠕变本构模型。通过不同温度下泥岩的蠕变试验数据对建立的蠕变损伤模型参数进行识别,得到不同温度下蠕变损伤模型的材料参数。通过比较蠕变损伤模型的理论结果和试验结果发现,该模型能够很好地反映泥岩的蠕变特性,表明该模型的合理性和正确性。研究成果在一定程度上丰富了岩石力学的基本理论,也为相关岩体工程设计与研究提供参考。The step load creep experiments on mudstone specimens are carried out at normal temperature and high(700℃) temperature using MTS 810 rock mechanics servo-controlled testing system and MTS 652.02 high temperature furnace. The corresponding creep curves and creep empirical equation for mudstone are obtained. A creep constitutive model for mudstone is established considering temperature effect. The creep test data of mudstone at different temperatures are used to carry out the identification of the creep damage model, and the creep parameters are obtained. It is found that the model can well describe the creep properties in the whole process by comparing the results obtained from the creep damage model and the creep test data. The rationality and correctness of the creep damage model are validated. To some extent, the research results enrich the basic theory of rock mechanics and provide valuable reference for the design of rock engineering at high temperature.

关 键 词：岩石力学 高温 泥岩 蠕变 

分 类 号：TU452[建筑科学—岩土工程]