突变理论在单桩竖向承载力确定中的应用  

Application of Catastrophe Theory in Ascertainment of Vertical Bearing Capacity of Single Pile

作　　者：崔树琴[1] 张远芳[1] 李传镔 候新强[3] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆城乡岩土勘察设计研究院,新疆乌鲁木齐830002 [3]铁道部第一勘察设计院分院,新疆乌鲁木齐830011

出　　处：《水利与建筑工程学报》2006年第2期19-22,共4页Journal of Water Resources and Architectural Engineering

基　　金：新疆水利水电工程重点学科基金资助(xjzdsk-2002-10-05)

摘　　要：灌注桩竖向承载力确定的方法较多,但因延性破坏和脆性破坏难以区分,没有一个理想的公式。针对此问题,拟定了灌注桩受竖向荷载时的荷载与位移的关系曲线,并将其运用于突变理论,导出了单桩竖向承载力的计算公式,给出了延性破坏与脆性破坏的界定标准。Although many kinds of theories are used to ascertain vertical bearing capacity of cast-in-place pile, it is difficult to distinguish ductility failure and brittle failure with these theories, and there is no the best formulation. To solve this problem, the load-displacement curve is supposed when the cast-in-place pile bears vertical load, and the curve is applied for the catastrophe theory. As a result, the formulation of the vertical bearing capacity of single pile is deduced, meanwhile, the dividing line between the ductility failure and brittle failure is demarcated.

关 键 词：突变理论 尖点突变 单桩竖向承载力 稳定性分析 本构关系 

分 类 号：TU473.11[建筑科学—结构工程]