关于护坡极值冰压力分析的几个基本问题  

Some Basic Problems About Limit Ice Pressure Analysis on Slope Lining

作　　者：李锋[1] 高泰[1] 陈凯[1] 

机构地区：[1]大连理工大学,辽宁大连116024

出　　处：《黑龙江水专学报》2009年第3期110-113,共4页Journal of Heilongjiang Hydraulic Engineering College

基　　金：国家863计划项目(2001AA602015);国家自然科学基金资助项目(10772036)

摘　　要：讨论了关于水库护坡极值冰压力分析的几个基本问题,即主导的控制机理、破坏准则和破坏模式。通过定性分析说明了极值冰压力由冰盖极限承载力控制;将最大冰压力产生的典型条件和冰的材料力学性质进行对比,论证了冰盖的极限破坏由断裂准则而不是强度准则主导;通过原型冰模拟试验确认了冰盖的主导破坏模式是蠕变屈曲而不是压缩断裂。这些研究为发展应用断裂力学预测冰压力的新方法奠定了基础。Some basic problems about limit ice pressure analysis on slope lining of a reservoir are discussed, namely the dominant mechanism, failure criterion and failure mode. By using qualitative analysis, It is demonstrated that the limit ice pressure is controlled by the ultimate capacity of an ice cover; Contrasting typical conditions under which the maximum ice pressure have been observed with the mechanical properties of ice, it is proved that ultimate failure of ice cover should be dominated by fracture criterion instead of strength criterion; A series of tests of simulating failure are carried out, by which it is determined that the dominant failure mode of ice cover is creep buckling instead of fracture by compression. These researches have set a base to develop a new predicting method of ice pressure with fracture mechanics.

关 键 词：冰压力 护坡 机理 破坏准则 破坏模式 

分 类 号：TV698.2[水利工程—水利水电工程]