%0 Journal Article
%T STUDY ON MECHANICAL PROPERTIES OF MARBLE UNDER LOADING AND UNLOADING CONDITIONS<br>大理岩加卸载力学特性的研究
%A GAO Chun-yu
%A XU Jin
%A HE Peng
%A LIU Jian-feng
%A <br>高春玉
%A 徐 进
%A 何 鹏
%A 刘建锋
%J 岩石力学与工程学报
%D 2005
%I 
%X It is shown by tests that there are some differences between mechanical properties of rock masses under loading and unloading conditions. A series of tri-axial tests under loading and unloading conditions are done on the marble samples from the slopes of the Jinping Primary Hydropower Project to study the mechanical properties of marble. Then the mechanical parameters are calculated and interpreted,and the complete stress-strain curves are studied and compared. The results of these tests show that there are obvious differences between mechanical properties of marble under loading and unloading conditions. Under the unloading condition,the deformation modulus and the compressive strength decline,and for the shear strength,c declines a great deal,but ? increases a little. In the failure process,the lateral strain under unloading condition increases much more than that under loading condition with the same confining pressure,the plasticity declines and the brittleness increases. The results show the concrete difference of mechanical properties of marble under loading and unloading conditions and offer important references to engineering problem.
%K rock mechanics
%K marble
%K unloading test
%K stress-strain
%K mechanical parameter<br>岩石力学
%K 大理岩
%K 卸载试验
%K 应力–应变
%K 力学参数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=D3421FAA1A0A0F0C&jid=35E747D791A1346351AFB523B7FA35CB&aid=5A9D3540415249F5&yid=2DD7160C83D0ACED&vid=B91E8C6D6FE990DB&iid=38B194292C032A66&sid=522844664D9E629A&eid=E0172F1A638CE984&journal_id=1000-6915&journal_name=岩石力学与工程学报&referenced_num=20&reference_num=12