【作者】 桂晓明； 徐永君； 赵斌；

【Author】 GUI Xiao-ming,XU Yong-jun,ZHAO Bin (Key Laboratory for Hydrodynamics and Ocean Engineering,Institute of Mechanics,Chinese Academy of Science,Beijing 100190,China)

【机构】 中国科学院力学研究所水动力学与海洋工程重点实验室；

【摘要】 U型拱梁在隧道支护和矿山巷道支护中应用广泛,实际工程中的地压作用以及注浆加固过程中产生的集中力都可能引起支架的失稳破坏。本文利用有限元数值分析软件ANSYS采用我们提出的瞬态分析计算失稳临界载荷方法对不同对称位置受径向集中力作用的U型钢拱梁的稳定性进行了研究,并分别采用特征值屈曲分析和几何非线性分析方法进行了分析,将得到的失稳临界荷载值进行了对比分析。研究结果为工程应用提供了可行方法和理论依据。更多还原

【Abstract】 U-type arch is widely used in tunnel support and mine roadway support.This paper is concerned with the in-plane elastic stability of U-type arch with a Y type symmetric cross section which subjected to a pair of symmetric radial concentrated loads.By using the finite element analysis software ANSYS,the critical forces are obtained for different loading locations.Based on the traditional instability analysis methods offered by ANSYS, transient analysis method is first presented and used in this present paper to obtain the critical loads.The results show that the transient analysis method could guarantee that the corresponding critical load is the lower.The research results provide a feasible method and theory basis for engineering applications.更多还原