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A platform for research: civil engineering, architecture and urbanism
Uplift pile axial force correction calculation method and test device
The invention provides an uplift pile axial force correction calculation method and a test device, which are convenient in calculation, can consider the change of elastic modulus of concrete and accurately evaluate the load condition of the uplift pile, and are suitable for working conditions of concrete with different strength grades. Comprising the following steps: S1, applying different tensile forces to a to-be-tested uplift pile to obtain a concrete average dependent variable epsilon t and a steel bar average dependent variable epsilon a; s2, based on the steel bar average dependent variable epsilon a, the steel bar cross section area and the steel bar elastic modulus, obtaining a steel bar axial force Fa; s3, based on the actual axial force applied to the uplift pile body, the obtained concrete average dependent variable epsilon t and the concrete cross section area, the elastic modulus E (epsilon) of the concrete under different strains is obtained, and a relation curve between the concrete average dependent variable epsilon t and the elastic modulus E (epsilon) is obtained according to the elastic modulus E (epsilon) of the concrete under different strains; and S4, the axial force borne by the concrete is calculated in a segmented mode, and then the axial force value F of the whole reinforced concrete uplift pile under different tension conditions is obtained.
本发明提供一种抗拔桩轴力修正计算方法及测试装置，其计算方便，可考虑混凝土弹性模量变化，准确评估抗拔桩荷载情况，适用于不同强度等级混凝土工况；包括步骤：S1、对待测抗拔桩施加不同拉力，获得混凝土平均应变量εt和钢筋平均应变量εa；S2、基于钢筋平均应变量εa以及钢筋横截面积、钢筋弹性模量，获得钢筋轴力Fa；S3、基于施加到抗拔桩桩体上的实际轴力、获得的混凝土平均应变量εt以及混凝土横截面积，获得混凝土不同应变下的弹性模量E(ε)，并根据混凝土不同应变下的弹性模量E(ε)获得混凝土平均应变量εt与弹性模量E(ε)之间的关系曲线；S4、将混凝土承担的轴力进行分段计算，进而获得整根钢筋混凝土抗拔桩在不同拉力条件下的轴力值F。
Uplift pile axial force correction calculation method and test device
The invention provides an uplift pile axial force correction calculation method and a test device, which are convenient in calculation, can consider the change of elastic modulus of concrete and accurately evaluate the load condition of the uplift pile, and are suitable for working conditions of concrete with different strength grades. Comprising the following steps: S1, applying different tensile forces to a to-be-tested uplift pile to obtain a concrete average dependent variable epsilon t and a steel bar average dependent variable epsilon a; s2, based on the steel bar average dependent variable epsilon a, the steel bar cross section area and the steel bar elastic modulus, obtaining a steel bar axial force Fa; s3, based on the actual axial force applied to the uplift pile body, the obtained concrete average dependent variable epsilon t and the concrete cross section area, the elastic modulus E (epsilon) of the concrete under different strains is obtained, and a relation curve between the concrete average dependent variable epsilon t and the elastic modulus E (epsilon) is obtained according to the elastic modulus E (epsilon) of the concrete under different strains; and S4, the axial force borne by the concrete is calculated in a segmented mode, and then the axial force value F of the whole reinforced concrete uplift pile under different tension conditions is obtained.
本发明提供一种抗拔桩轴力修正计算方法及测试装置，其计算方便，可考虑混凝土弹性模量变化，准确评估抗拔桩荷载情况，适用于不同强度等级混凝土工况；包括步骤：S1、对待测抗拔桩施加不同拉力，获得混凝土平均应变量εt和钢筋平均应变量εa；S2、基于钢筋平均应变量εa以及钢筋横截面积、钢筋弹性模量，获得钢筋轴力Fa；S3、基于施加到抗拔桩桩体上的实际轴力、获得的混凝土平均应变量εt以及混凝土横截面积，获得混凝土不同应变下的弹性模量E(ε)，并根据混凝土不同应变下的弹性模量E(ε)获得混凝土平均应变量εt与弹性模量E(ε)之间的关系曲线；S4、将混凝土承担的轴力进行分段计算，进而获得整根钢筋混凝土抗拔桩在不同拉力条件下的轴力值F。
Uplift pile axial force correction calculation method and test device
一种抗拔桩轴力修正计算方法及测试装置
JIA LIXIANG (author) / CHEN MINGYIN (author) / ZHANG JINGFENG (author) / WEI GUANGQING (author) / SHI BIN (author)
2024-11-26
Patent
Electronic Resource
Chinese
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