上钢下混组合桩水平承载性能影响因素分析

为研究不同因素对上钢下混组合桩水平承载性能影响,采用有限元软件ABAQUS,计算分析不同接桩深度、桩径、联接段参数的上钢下混组合桩在水平荷载作用下的桩身水平位移、弯矩、应力分布以及极限承载力。研究结果表明,组合桩接桩深度是影响上钢下混组合桩水平承载性能的主要因素,组合桩桩径、联段刚度和长度的影响相对较小,提出上钢下混组合桩接桩深度不小于10D,可确保组合桩的水平承载性能不低于同条件钢管桩的结论,为上钢下混组合桩的工程应用提供了技术支撑。

Analysis of Influencing Factors on the Horizontal Capacity of the Steel-concrete Composite Pile

In order to analyze the influence of different factors on the horizontal bearing performance of the SC pile, the ABAQUS finite element software was used to analyze the horizontal displacement, bending moment, stress distribution, and ultimate bearing capacity under different pile extension depth, pile diameter, and connecting section parameters under horizontal loads. According to the results, the depth of pile extension is the main factor that affects the horizontal bearing performance of the composite pile. The influence of the diameter of the composite pile, the stiffness and length of the joint sectionhave less effect. The the depth of pile extension of thecomposite pile is no less than ten times of the pile diameter therefore can ensure that the horizontal capacity of the piles, and is not less than that of the steel pipe pile under the same conditions, which could provide technical support for the engineering application of the SC pile.