%0 Journal Article
%T COMPUTATIONAL SIMULATION AND ANALYSIS ON FRACTURING MECHANISM OF CRANE GIRDER BOLTED TO ROCK WALL OF CHAMBER<br>岩锚吊车梁破坏机制的计算模拟分析
%A Li Shouju
%A Liu Yingxi
%A Liu Jinbao
%A Sun Huiling
%A <br>李守巨
%A 刘迎曦
%A 刘进宝
%A 孙慧玲
%J 岩石力学与工程学报
%D 2004
%I 
%X The mechanical behavior of reinforced concrete crane girder bolted to rock wall of chamber is analyzed with nonlinear finite element method. The concrete and rock mass are modeled by Drucker-Prager elasto-perfectly plastic constitutive relation. The Drocker-Prager yield criterion has found wide practical application as a method of defining the stress conditions under which rock mass will deform inelastically and collapse. Combined with the extending project practice of underground powerhouse at hydropower stations,the fracturing mechanism and stability of crane girder are investigated numerically. Computational results show that the cohesion and friction angle between rock mass and concrete have a notable influence on the stability of crane girder bolted to rock wall of chamber. The safety factor of concrete crane girder will be reduced with the decrement of inner cohesion between the rock mass and concrete crane girder. The safety factor of concrete crane girder can exceed 3.7 while the failure of interface between the rock mass and concrete occures. The further excavation of underground powerhouse will affect the stress distribution of system bolts and rock mass near crane girder. It is very important for improving stress states and enhancing stability of concrete crane girder to control effectively rock damages induced by excavation blasting.
%K underground engineering
%K crane girder
%K fracturing mechanism
%K underground house
%K bolts
%K Drucker-Prager yield criterion<br>地下工程
%K 吊车粱
%K 钢筋混凝土
%K 地下厂房
%K 锚杆
%K Drucke-Prager弹塑性
%K 围岩
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=D3421FAA1A0A0F0C&jid=35E747D791A1346351AFB523B7FA35CB&aid=52258F061973A5D4&yid=D0E58B75BFD8E51C&vid=EA389574707BDED3&iid=F3090AE9B60B7ED1&sid=1DB1D13154F28125&eid=09614E07E1BC4184&journal_id=1000-6915&journal_name=岩石力学与工程学报&referenced_num=13&reference_num=17