规则齿型结构面的应力松弛特性试验研究  

Experimental Study of Stress Relaxation Characteristics of Regular Rock Mass Discontinuties

作　　者：周文锋[1] 沈明荣[1,2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《土工基础》2014年第2期138-141,共4页Soil Engineering and Foundation

基　　金：国家自然科学基金重点项目(50639090);上海市重点学科建设项目(B308)

摘　　要：应力松弛是岩土材料常见的流变特性之一,应力松弛对于岩体特别是地下结构支护的长期稳定性具有重要的影响。将应力松弛单独作为研究对象,通过规则齿型结构面在剪切应力条件下的应力松弛试验,研究结构面的力学特征和主要规律,通过对试验数据的分析了解应力松弛规律,并对试验数据进行拟合,利用Burgers体模型来反映规则齿型结构面的应力松弛特性。Stress relaxation is one of the common rheological characteristics of rock and soil materials. The stress relaxation has important effect on the longterm stability of underground structures. In this paper, the stress relaxation phenomenon is stud ied as a separate research object. Throughout the shear stress relaxation test of regular discontinuities, the mechanical features of the structural planes are examined. The test results are simulated with Burgers model to reflect the stress relaxation charac teristics of regular rock mass discontinuities.

关 键 词：岩石力学 结构面 应力松弛 数据拟合 

分 类 号：TU411[建筑科学—岩土工程]