基于双应变胡克模型的岩石非线性弹性行为分析.pdfVIP

31 10 Vol.31 No.10 2012 10 Chinese Journal of Rock Mechanics and Engineering Oct.2012 12 2 3 LIU Huihai (1. 116024 2. 94720 3. 400030) / TOUGH- FLAC3D (two-part Hookes modelTPHM) TPHM TPHM ()( )( )TPHM / ( ) Mont Terri ED-B TPHM TPHM / TPHM TU 45 A 2012 INVESTIGATION ON NONLINEAR ELASTIC BEHAVIOUR OF ROCKS BASED ON A TWO-PART HOOKES MODEL 12 2 3 LI Lianchong LIU Huihai ZHAO Yu (1. School of Civil and Hydraulic EngineeringDalian University of Technology Dalian Liaoning 116024China 2. Earth Sciences Division Lawrence Berkeley National Laboratory Berkeley 94720USA3. College of Civil Engineering Chongqing UniversityChongqing 400030China) Abstract The nonlinear behavior plays an important role in the stability of rock engineering. As an attempt to more accurately model the elastic response of porous or fractured rocksa recently developed stress-strain relationshipcalled two-part Hookes model(TPHM)is incorporated into a coupled reservoir-geomechanical simulatorTOUGH-FLAC3D code. TPHM is based on a macroscopic approximation that the natural strain (volume change divided by rock volume at the current stress state)rather than the engineering strain(volume change divided by the unstressed rock volume)should be used in Hookes law for accurate modeling of the elastic deformation except when mechanical deformation