装配式波形腹板钢箱-混凝土组合梁桥动力特性分析与试验研究

冀伟,罗奎,马万良,唐寿洋,席培培

振动与冲击 ›› 2020, Vol. 39 ›› Issue (20) : 1-7.

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (20) : 1-7.
论文

装配式波形腹板钢箱-混凝土组合梁桥动力特性分析与试验研究

  • 冀伟,罗奎,马万良,唐寿洋,席培培
作者信息 +

Dynamic characteristics analysis and experimental study of a fabricated corrugated web steel box-concrete composite girder bridge

  • JI Wei,LUO Kui,MA Wanliang,TANG Shouyang,XI Peipei
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摘要

  为了研究波形钢腹板的剪切变形和箱梁的剪力滞效应对波形腹板钢箱-混凝土组合梁桥自振特性的影响,运用势能驻值原理推导出波形腹板钢箱-混凝土组合梁桥的单元刚度矩阵。根据所推导的单元刚度矩阵,采用MATLAB软件编写了自振特性的求解程序,计算了波形腹板钢箱-混凝土组合梁桥的自振频率和振型。随后,对波形腹板钢箱-混凝土组合梁桥的自振频率的影响因素进行了分析。结果表明:钢底板的厚度对竖向基频的影响较大,而波形钢腹板的厚度对竖向基频的影响较小;随着自振频率阶数的升高,钢底板的厚度对自振频率的影响程度依次减弱,而波形钢腹板的厚度对自振频率的影响程度依次增强;自振特性的求解程序需要的单元数量较少,大大缩短了自振特性的求解时间,提高了计算效率,研究结果可为该类桥型的自振特性的分析和计算提供参考。

Abstract

In order to study the influence of the shear deformation of a corrugated steel web and the shear lag effect of a box girder on the natural characteristics of a corrugated web steel box-concrete composite girder bridge, the element stiffness matrix of the corrugated web steel box-concrete composite girder bridge was derived by using the potential energy varation principle. According to the element stiffness matrix derived thereby, MATLAB was used to code the solving program for the natural characteristics, the natural frequency and mode shape of the corrugated steel box-concrete composite girder bridge were calculated. Subsequently, the influence parameters of the natural vibration frequency of the corrugated web steel box-concrete composite girder bridge were analyzed. The result shows that, the vertical fundamental frequency is greatly affected by the thickness of the steel bottom sheet, while the effect on vertical fundamental frequency is small with the thickness of the corrugated steel web. As the frequency order of natural vibration increases, the effect degree of the thickness of the steel bottom sheet on the natural vibration frequency decreases in turn, and the influence of the thickness of the corrugated steel webs on the natural vibration frequency increases successively. The number of elements required for the natural characteristic solving program is small, which greatly shortens the calculation time of natural characteristics solution, improves the calculation efficiency. The results can provide reference for the analysis and calculation of the natural characteristics of this type of bridges.

关键词

波形钢腹板 / 单元刚度矩阵 / 组合箱梁 / 自振频率 / 动力特性试验 / 参数分析

Key words

corrugated steel web / element stiffness matrix / composite box girder / natural frequencies / dynamic characteristic test / parameter analysis

引用本文

导出引用
冀伟,罗奎,马万良,唐寿洋,席培培. 装配式波形腹板钢箱-混凝土组合梁桥动力特性分析与试验研究[J]. 振动与冲击, 2020, 39(20): 1-7
JI Wei,LUO Kui,MA Wanliang,TANG Shouyang,XI Peipei. Dynamic characteristics analysis and experimental study of a fabricated corrugated web steel box-concrete composite girder bridge[J]. Journal of Vibration and Shock, 2020, 39(20): 1-7

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