摘要
为研究劲性复合桩桩筏基础的承载特性,采用ABAQUS三维有限元软件对劲性复合桩桩筏基础在竖向荷载作用下的响应规律进行分析。考虑在不同桩长、桩数、筏板厚度以及芯桩直径的影响因素下其荷载-沉降曲线的变化规律,并将荷载沉降进行归一化处理。结果表明在一定荷载范围内,角桩首先承受较大荷载,而随荷载的不断增加,中心桩则会分担更多的荷载;桩长一定的条件下,桩筏基础的位移随芯桩直径的增大而减小,而当芯桩直径一定时,沉降会随桩长的增加而减小;筏板厚度也会对桩筏系统的竖向承载性能产生一定的影响,分析表明筏板厚度处于1~1.5d时为最佳。研究为工程实际应用以及对劲性复合桩桩筏基础的推广提供参考。
In order to study the bearing characteristics of stiff composite pile raft foundation,ABAQUS three-dimen⁃sional finite element software is used to analyze the response law of stiff composite pile raft foundation under vertical load.Considering the variation of the load-settlement curve under the influence factors of different pile length,pile number,raft thickness,and core pile diameter,the load settlement is normalized.The results show that the corner pile bears a larger load first within a certain load range,and with the increase of load,the central pile will share more load.Under the condition of a certain pile length,the displacement of the pile raft foundation decreases with the in⁃crease of the diameter of the core pile,and when the diameter of the core pile is constant,the settlement decreases with the increase of the pile length.The thickness of the raft has a certain impact on the vertical bearing performance of the pile raft system,and the thickness of the raft is the best when the thickness of the raft is within 1~1.5d.The re⁃search may provide the reference for the practical application of engineering and the popularization of the composite pile raft foundation.
作者
高云凤
纠永志
GAO Yunfeng;JIU Yongzhi(College of Architectural Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China)
出处
《低温建筑技术》
2024年第1期101-104,共4页
Low Temperature Architecture Technology
基金
国家自然科学基金项目(51608548)。
关键词
劲性复合桩
桩筏系统
有限元分析
荷载-沉降曲线
竖向承载力
strength composite pile
pile raft system
finite element analysis
load-settlement curve
vertical bear⁃ing capacity
