混合梁桥钢混结合段合理布置位置的优化  

Optimization of rational location of steel-concrete joint in hybrid girder bridges

作　　者：黄国红 官彩依 卓为顶 HUANG Guohong;GUAN Caiyi;ZHUO Weiding(Nanjing Public Engineering Construction Center, Nanjing 210019, China;School of Civil Engineering, Southeast University, Nanjing 211189, China;School of Architecture Engineering, Nanjing Institute of Technology, Nanjing 211167, China)

机构地区：[1]南京市公共工程建设中心,南京210019 [2]东南大学土木工程学院,南京211189 [3]南京工程学院建筑工程学院,南京211167

出　　处：《山东交通学院学报》2021年第1期32-40,共9页Journal of Shandong Jiaotong University

基　　金：江苏省交通运输科技项目(2018Y22)。

摘　　要：为合理布置钢-混凝土混合梁桥钢混结合段位置,基于中墩截面弯矩等效和边支座支反力控制原则,采用结构力学位移法建立力学和数学计算模型,推导三跨混合连续梁桥中跨钢梁长度占比的合理取值范围,获得三跨混合连续梁桥的跨径布置及结合段合理位置(边中跨比与中跨钢梁长度占比)之间的关系或可行域范围。以南京机场二通道秦淮新河桥为例,计算钢混结合段的合理位置,结果表明:采用上述设计方法得到边中跨比与中跨钢梁长度占比处于合理范围,设计方法正确可行。The rational location of steel-concrete joint is one of the critical problems in the design of hybrid girder bridges.This paper proposes the principles of moment equivalence of middle pier and reaction force of side support.Based on the displacement method of structural mechanics,the mechanical and mathematical calculation models are established,and the reasonable value range of the length proportion of steel girder is derived.The relationship of the span layout and the rational location of joint section(i.e.sidespan-to-midspan ratio and the length proportion of steel girder)are obtained.Taking Qinhuai Bridge on the second channel to Nanjing airport as an example,the rational location of steel-concrete joint is calculated,which shows the validity and accuracy of this design method.

关 键 词：混合连续梁桥 结合段合理位置 中墩截面弯矩等效原则 边支座支反力控制原则 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]