RESEARCH ON NONLINEAR RHEOLOGICAL MODEL OF DIABASE AND TREATMENT FOR CREEP LOADING HISTIORY
YANG Wendong1，2，ZHANG Qiangyong1，CHEN Fang1，LI Shucai1，LI Wengang3，WANG Jianhong3， HE Ruping3，ZENG Jiquan3
(1. Geotechnical and Structural Engineering Research Center，Shandong University，Jinan，Shandong 250061，China；
2. College of Transport and Storage and Civil Engineering，China University of Petroleum，Qingdao，Shandong 266555，China；
3. HydroChina Chengdu Engineering Corporation，Chengdu，Sichuan 610072，China)
Abstract：Single specimen is used for rheological test method under multistep loading，which avoids the discrete affection of specimen for rheological deformation. But the deformation of the later loading contains the creep deformation induced by the former loading of all levels by this method，which always makes people confused. The memory effect of loading history for the rheological media is analyzed detailedly；and the concrete steps and mathematical basis of the data processing are proposed. Based on the triaxial rheological test results of diabase in dam foundation of Dagangshan hydropower station，the typical character of rheological curves is analyzed. According to loading creep test curves under different stress levels，by connecting the instantaneous elasticity Hooke body，visco-elastoplastic Schiffman body and nonlinear viscoplastic body in series，a new nonlinear visco-elastoplastic rheological model of rock is proposed. Through introducing the nonlinear viscoplastic component，this rheological model can describe the transient creep stage，steady-state creep stage and tertiary creep stage. Three-dimensional rheological and creep equations under constant stress are deduced. On the basis of complete creep curves gained by rheology equipment，the rheological parameters are inversed. The comparison between nonlinear rheological model and experimental curves shows that two curves accord well with each other，and the proposed nonlinear visco-elastoplastic rheological model is available and reasonable.
杨文东1，2，张强勇1，陈 芳1，李术才1，李文纲3，王建洪3，贺如平3，曾纪全3. 辉绿岩非线性流变模型及蠕变加载历史的处理方法研究[J]. 岩石力学与工程学报, 2011, 30(7): 1405-1413.
YANG Wendong1，2，ZHANG Qiangyong1，CHEN Fang1，LI Shucai1，LI Wengang3，WANG Jianhong3，. RESEARCH ON NONLINEAR RHEOLOGICAL MODEL OF DIABASE AND TREATMENT FOR CREEP LOADING HISTIORY. , 2011, 30(7): 1405-1413.
2011, Vol. 30 
