非均匀荷载作用下层状岩体矩形裂隙力学特性分析  

ANALYSIS OF RECTANGULAR CRACKS SUBJECTED TO NON-UNIFORM LOADS IN LAYERED ROCKS

作　　者：肖洪天[1] 王炳军[1] 岳中琦[2] 

机构地区：[1]山东科技大学土木建筑学院,山东省土木工程防灾减灾重点实验室,青岛266510 [2]香港大学土木工程系,中国香港

出　　处：《工程力学》2012年第12期108-113,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(51079081,41172242);山东省“泰山学者”建设工程专项经费项目(岩土工程专业)

摘　　要：该文采用已发展的层状材料基本解对偶边界元方法,分析了层状裂隙岩体的力学特性。在分析无限域层状岩体中裂隙时,该对偶边界元方法退化为间断位移法。在建议的间断位移法中,只需沿裂隙一个面离散,采用9结点等参单元和非连续单元离散裂隙面。采用建议方法计算了作用有非均匀荷载矩形裂隙的间断位移。利用裂隙尖端附近的间断位移值,计算了应力强度因子。给出不同岩性组合情形时矩形裂隙应力强度因子的分布规律。This paper analyzes the fracture mechanics of layered rocks by using the dual boundary element method （DBEM）. The DBEM is based on the fundamental solutions of a layered medium. In analyzing crack problems in the layered media of an infinite extent, the DBEM degenerates into a discontinuous displacement method （DDM）. In the DDM, only one crack surface is discretized, and the 9-noded continuous and discontinuouselements are used to discretize the crack surface. A rectangular crack subjected to non-uniform and compressive loads is analyzed. By using the discontinuous displacement values, the stress intensity factor （SIF） values are calculated and compared for rectangular cracks in layered rocks consisting of different rocks.

关 键 词：间断位移方法 层状岩体 矩形裂隙 应力强度因子 非均匀荷载 

分 类 号：O346.1[理学—固体力学]