摘要
总结并分析了嵌岩灌注桩轴向承载有限元模拟中常用的4种桩岩接触界面模型,基于其中运用最广泛、效果最好的双曲线型荷载传递模型,根据厚壁圆筒的弹性理论解和Patton(1966)关于规则粗糙起伏无填充物的岩石结构面抗剪强度理论研究,对传统双曲线荷载传递模型进行修正,以解决其参数难选取的问题。并对有限元软件Abaqus进行基于修正荷载传递法的FRIC子程序二次开发,提出嵌岩灌注桩"荷载传递-有限元"联合模型。运用联合模型对比分析了嵌岩灌注桩原位轴向静载荷试验,结果表明联合模型反映的承载性状和荷载传递机理与现场实测吻合良好。
This paper summarizes four kinds of pile-rock interface models that are frequently used in FEM simulation for rock-socketed pile. An improved hyperbolic model of load-transfer for rock-socketed pile is proposed to resolve the problem of parameter selection based on the most common and effective hyperbolic model of load- transfer according to the elastic solution of thick-wall cylinder and the theoretical research about the shear strength of the discontinuities ordered roughness without filler （Patton（1966））. The ＂Load Transfer -FEM＂ named united model is put forward according to FRIC subroutine which applies the improved hyperbolic model of load-transfer on the strength of the ABAQUS （CAE）. The bearing behavior and load transfer mechanism for rock-socketed pile reflected by the results from applying united model to analyze static loading test agree well with field measurements.
出处
《水运工程》
北大核心
2013年第5期143-149,共7页
Port & Waterway Engineering
