CAJ | 학술논문

在预应力混凝土桥梁中，由于较大的预应力损失而直接影响了结构的受力和变形，使结构过早的失效或破坏，预应力筋与孔道壁之间的摩阻是影响其预应力损失的主要因素之一。以郑州市某三跨连续箱梁桥的摩阻试验为背景，以弯曲通长束为主要研究对象，运用最小二乘法原理和二元线性回归方法计算了孔道摩擦系数μ和管道偏差系数k，同时结合桥梁结构有限元分析程序Midas对实际桥梁在不同摩阻系数下进行挠度和应力计算分析，结果表明：对于弯曲通长束而言摩阻损失对跨中截面处的影响更为显著，同时对该桥预应力施工提出了优化措施，这可以为同类型桥梁预应力张拉施工与计算控制提供参考。
재예응력혼응토교량중，유우교대적예응력손실이직접영향료결구적수력화변형，사결구과조적실효혹파배，예응력근여공도벽지간적마조시영향기예응력손실적주요인소지일。이정주시모삼과련속상량교적마조시험위배경，이만곡통장속위주요연구대상，운용최소이승법원리화이원선성회귀방법계산료공도마찰계수μ화관도편차계수k，동시결합교량결구유한원분석정서Midas대실제교량재불동마조계수하진행뇨도화응력계산분석，결과표명：대우만곡통장속이언마조손실대과중절면처적영향경위현저，동시대해교예응력시공제출료우화조시，저가이위동류형교량예응력장랍시공여계산공제제공삼고。
In the prestressed concrete bridges , the stress and deformation of the structures are influenced by great prestressed loss so much that the structures are destroyed at early stages .Friction between the tendon and the duct is one of the main factors to the prestress loss .Based on the friction test of a three-span continuous box girder bridge in Zhengzhou City with the long beam as the main objective of study , the principle of least square method and the two element linear regression method are used to calculate duct friction coefficient μand pipe de-viation coefficient k.The actual bridge deflection and stress at different friction coefficient are calculated and ana -lyzed with the finite element structural analysis program Midas .The results show that the effect on friction loss for curved long beam especially at mid span section is more significant .Meanwhile , the optimized measures are pro-posed to the construction of prestressed bridge , which can provide reference for prestressed stretching construc-tion and calculation control of the same type bridge .