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本文研究大跨度拱桥悬臂施工中钢筋混凝土曲柱的纵向弯曲问题。通过理论和试验研究导出曲柱曲率分布系数β,测得16根抛物线曲柱在对称等偏心荷载作用下的中点附加挠度和极限承载力,归纳出载面刚度系数x_?和曲率φ的公式,从而得出钢筋混凝土曲柱和直柱η值的两种通用表达式。
This paper studies the longitudinal bending of reinforced concrete curved columns in cantilever construction of long-span arch bridges. The curvature distribution coefficient β of the curved column was derived through theoretical and experimental studies. The additional deflection and ultimate bearing capacity of the sixteen parabolic curved columns under symmetrical and equal eccentric loads were measured. The formulae for the stiffness coefficient x_? and curvature φ of the bearing surface were summed up. Thus, two general expressions for the η value of reinforced concrete curved column and straight column are obtained.