匝道固结体系曲线箱梁桥弯扭性能分析  

Analysis of Bending and Torsion Properties of Curved Box Girder Bridge with Ramp Consolidation System

作　　者：王解军[1] 冯珍 黄佳[1] 杨孝博 WANG Jiejun;FENG Zhen;HUANG Jia;YANG Xiaobo(College of Civil Engineering,Central South University of Forestry and Technology,Changsha,Hunan 410004,China)

机构地区：[1]中南林业科技大学土木工程学院,湖南长沙410004

出　　处：《公路工程》2018年第5期99-104,共6页Highway Engineering

基　　金：湖南省交通厅科技项目(201526)

摘　　要：针对高速公路及城市匝道中的混凝土曲线箱梁桥存在的支座脱空、箱梁横移与侧倾等一些问题,提出采用设缝墩与箱梁固结的新体系,该体系由于取消了墩上支座、梁墩固结,结构整体性好,可有效解决前述问题,且有利于结构抗震。通过有限元计算,对比分析了固结体系曲线梁桥和曲线连续梁桥的主梁弯、扭性能。结果表明固结体系曲线箱梁的最大弯矩和扭矩均小于连续曲线梁。Aiming at the problems such as the emptying of the bearings,the box girder traversing and the roll of the concrete curved box girder bridge in the expressway and the urban ramp,a new system for the consolidation of the isolation joint limb piers and the box girder was put forwarded.The new system can effectively solve the problems mentioned above,and it is beneficial to the earthquake resistance of the structure because of the cancellation of the support on the pier and the consolidation of the beam pier.In this paper,through the finite element calculation,the bending and torsion performance of the new system and the continuous girder bridge are compared and analyzed.The results show that maximum value of bending moment and torque torsion of the curved box girder of the consolidation system is lesser than that of the continuous curved beam.

关 键 词：匝道曲线箱梁桥 设缝墩 固结体系 弯扭性能 有限元 

分 类 号：U441[建筑科学—桥梁与隧道工程]