拱坝超载过程中的拱端力分布规律  

Distribution of Arch Abutment Forces in Condition of Overload

作　　者：杨强[1] 陈新[1] 周维垣[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水力发电学报》2002年第E01期27-33,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金 ( 5 98790 0 5 );清华大学基础研究基金资助

摘　　要：本文对某拱坝的弹塑性有限元应力计算成果进行了整理 ,计算出各高程拱圈的拱端轴力、剪力和弯矩。研究了超载过程中拱端内力的重分布规律 ,并对拱坝在正常工作状态和破坏状态时拱端力的差异进行定量分析。结果表明 ,轴力和弯矩的最大值均出现在距坝底 0 3 1坝高处 ,在正常荷载与破坏荷载这两种情况下 ,拱端轴力和弯矩沿高程分布规律相似 ,而拱端剪力沿高程分布与此有大的差异。In this paper, based on node stresses at arch abutment obtained from FEM analysis for an arch dam, the axial force、transverse shear and moment at abutments of arches are computed. The redistribution of arch abutment forces in condition of overload is studied. The maximum axial force and the maximum moment are both occurred at the height of the arch dam multiplied by 0 31. The axial forces and moments at abutments along altitude have similar distribution in conditions of normal loads and failure loads, but the shears are large different from that.

关 键 词：拱端力 超载 内力重分布 拱坝 

分 类 号：TV642.4[水利工程—水利水电工程]