梁拱组合体系桥梁刚度性能研究  

Stiffness Performance of Girder-arch Combination System Bridge

作　　者：李凌霄 邹德强 刘雄 朱朝银 付孟生 陈觅杭 LI Lingxiao;ZOU Deqiang;LIU Xiong;ZHU Chaoyin;FU Mengsheng;CHEN Mihang(China Construction Fifth Engineering Bureau Co.,Ltd.,Changsha,Hunan 410004,China)

机构地区：[1]中国建筑第五工程局有限公司,湖南长沙410004

出　　处：《施工技术（中英文）》2024年第18期38-44,58,共8页Construction Technology

摘　　要：为分析不同关键设计参数对梁拱组合体系桥梁刚度性能的影响,引入代表刚度的概念,根据定义得到理论计算公式;以江西于都胜利大桥为工程背景,计算组合体系结构刚度,分别考虑主梁刚度、主拱刚度、吊索直径等参数,基于单一参数变量法和总用钢量不变条件下建立多种不同设计参数模式下的有限元计算模型,对比分析计算结果得出:梁拱组合体系桥梁中,拱结构所占材料用量不大,但其对梁结构的刚度提升非常明显;吊索结构不直接提供代表刚度,但它用于梁拱2种结构间的受力分配,影响拱对梁的代表刚度提升效果;存在一个最佳拱梁刚度比,使得在总材料用量不变的条件下,组合后代表刚度最大;拱梁刚度比与主梁代表刚度的提升倍数存在对数函数关系。To explore the influence of different key design parameters on the stiffness performance of girder-arch combination system bridge,the concept of representative stiffness is firstly introduced,and theoretical calculation formulas are obtained based on the definition.Taking Victory Bridge in Yudu of Jiangxi as the engineering background,the structural stiffness of the combination system was analyzed and calculated,and the parameters such as the main girder stiffness,main arch stiffness,and suspension cable diameter were considered separately.Based on the single parameter variable method and the constant total steel consumption,multiple finite element calculation models under different design parameter modes were established,and the calculated results were compared and analyzed.The results show that in girder-arch combination system bridge,the material consumption of the arch structure is not high,but it significantly improves the stiffness of the girder structure;The suspension structure does not directly provide representative stiffness,but it is used for force distribution between girder and arch structures,thereby affecting the effect of the arch on improving the representative stiffness of the girder;It exists an optimal arch-girder stiffness ratio,under the condition of constant total material consumption,which represents the maximum stiffness when it is combined;There is a logarithmic function relationship between the arch-girder stiffness ratio and the increase in stiffness represented by the main girder.

关 键 词：桥梁工程 梁拱组合体系 代表刚度 有限元分析 参数分析 拱梁刚度比 

分 类 号：U441[建筑科学—桥梁与隧道工程]