【摘要】 基于铁摩辛柯能量法对高墩大跨T构桥进行静力分析,推导变截面高墩考虑稳定性要求时临界墩高和满足强度条件时最大墩高的计算公式,给出临界墩高和最大墩高与结构参数的关系曲线,研究内、外壁坡度变化对临界墩高和最大墩高的影响,并给出判别实际工程中的变截面压杆是大柔度压杆还是小柔度压杆的坡度界限值,以此为界判断是否需要对工程中的变截面承压杆件进行稳定校核。研究结果表明:本文方法简便、有效,对工程实际有一定的指导意义;该方法可推广至任意桥梁墩身自体施工阶段的设计,亦可用于连续刚构桥施工阶段的T构静定体系。更多还原

【Abstract】 Based on S.P.Timoshenko energy method,static analysis of T-shape rigid frame bridge with high pier and long span was done.Mathematical formula of the critical height of the varying cross-section pier for stability and the maximum height of it for strength were derived.The related curves between the critical height and the maximum height and configuration parameters were given.The influences of gradient changes of the inside and outside wall of pier on the critical height and the maximum height were studied by programming.And limit gradients to distinguish between big flexible column and small one among engineering variable cross-section columns were given.It was used to judge if the engineering members subject to compression with variable cross-section need stability checking.The results show that the above method is easy and effective to guide engineering significantly.This method can be extended to piers design during self-construction of any bridge.It can be used for the T-shape statically determinate system of continuous rigid frame bridge during construction as well.更多还原