声屏障对城市桥梁结构的影响研究

Research on Influence of Sound Barrier on Urban Bridge Structure

对目前工程上常用规范(图集)中的声屏障荷载取值进行对比,提出桥梁结构核算时建议采用的声屏障荷载取值计算方法。城市桥梁常见的上部结构形式有整体式和装配式两种,结合这两种上部结构不同的受力特点,通过简空间梁格模型的计算分析,阐述了不同体系上部结构在声屏障荷载作用下受影响的形式、范围及效应大小,并提出了便于简便计算的平面杆系模型的建模方法,对于桥宽较窄的高墩匝道桥,声屏障荷载可能直接影响下部墩柱及基础的规模与大小。

The values of sound barrier load in the current engineering specifications(atlas)are compared,and the calculation method of sound barrier load value in bridge structure accounting is put forward.There are two common superstructure forms of urban bridges like integral and assembled.In combination with different stress characteristics of the above two superstructures,through the calculation and analysis of the simple spatial grillage model,the influence form,range and effect of the superstructures of different systems under the sound barrier load are elaborated,and the modeling method of the plane bar model is put forward,which is convenient for simple calculation.As for the ramp bridge with narrow width and high pier,the sound barrier load may directly affect the scale and size of the lower pier and foundation.