桥梁荷载横向分布系数的研究

文章编号:(201602-0034-07

桥梁荷载横向分布系数的研究

王开明

(安康市交通规划设计院,陕西 安康  725000

  要:本文研究证明了偏心压力法存在基本错误,并提出了新的计算方法-桥梁荷载横向分布系数结构计算法。即,按照桥梁实际支座布置,在跨中建立连续梁按最不利布置荷载,求解支座反力系数;撤去支座以反力系数代替梁纵向挠曲位移,然后平滑削峰得到荷载横向分布系数。对目前广泛采用的先简支后连续体系桥梁,本文提出应计算纵向折减系数,将其与简支梁的横向分布系数乘积,作为连续梁的荷载横向分布系数;同时给出连续梁桥荷载试验最不利工况加载方式,以利对桥梁承载能力高效评价。

关键词:桥梁荷载横向分布系数计算新方法连续梁纵向折减系数

中图分类号U442          文献标识码A

The Research on the Lateral Distribution Coefficients of Bridge Loads

WANG Kai-ming

Ankang Traffic Planning and Design InstituteAnkang Shaanxi 725000China

AbstractThis paper had researched and discovered existing mistakes of the eccentric compression methodand a new methodwhich is the calculation method of the lateral distribution coefficient structure of the bridge loads is proposed.Depending on the actual arrangement of the bridge supports continuous beams  were construct between spans by the way of the most disadvantage distribution of loads to calculate the lateral distribution coefficients of loads after smooth peak clipping. Regarding to the wide using bridge systemwhich is applying the simply supported beams before the using of the continuous beamsthis paper proposed that using the productwhich between the calculated portrait discount coefficients and the lateral distribution coefficient of the simply supported beams, as the lateral distribution lead coefficient of the continuous beams. Simultaneouslythis paper provided the loading methods of the experimental most disadvantaged operation conditions of the continuous beam bridge loadsto improve the efficient of the assessments of the bridge bearing capacity.

Key wordsbridge beamlateral load distribution coefficientcalculationnew methodcontinuous beamsportrait discount coefficient