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根据恒载条件下横桥向双支座反力相等原则,对曲线梁桥设计中常见但尚无定论的支座偏心问题提出了2种计算方法,即最小偏心法和一致偏心法。本文阐述了2种方法的计算原理,推导了圆曲线下相应计算公式,并结合实际工程给出了实用计算表格,比较了2种方法的优缺点,探讨了通常偏心值随曲线半径R、跨数及集中分布荷载比GP/Gq的增大而减小的规律。
According to the principle of equal force of double bridge reaction under constant load, two kinds of calculation methods are proposed, which are common but not yet settled in the design of curved beam bridge, namely the minimum eccentricity method and the uniform eccentricity method. This paper describes the calculation principle of the two methods, derives the corresponding formulas under the circular curve, and gives a practical calculation table based on the actual project. The advantages and disadvantages of the two methods are compared. It is discussed that the eccentricity usually varies with the curve radius R Number and concentration distribution of load ratio GP / Gq increase and decrease the law.