A形高墩大跨度混凝土连续刚构桥设计技术研究  

Study of Design Techniques of A-Shape High-Rise Pier and Long Span Concrete Continuous Rigid-Frame Bridge

作　　者：陈思孝[1] 陈克坚[1] 李锐[1] 

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《桥梁建设》2014年第1期63-68,共6页Bridge Construction

基　　金：铁道部重点科研课题(2010G016-D)~~

摘　　要：蔡家沟大桥主桥为A形高墩大跨度混凝土连续刚构桥,A形高墩的合理坡率随墩高的增加而减缓,其横系梁的设置会增加墩的整体性,但会增加斜腿处的温度内力。为研究A形高墩的受力行为以及该桥的静、动力特性,采用ANSYS对A形高墩岔区节段及横系梁节段进行受力分析,并对该桥进行车桥耦合动力分析、地震反应分析、抗风性能及施工和运营阶段的空间分析。结果表明:A形高墩主要节段受力均满足要求;A形高墩大跨度混凝土连续刚构桥受力合理、横向刚度大、适应地形能力强、经济性好,具有较好的抗震、抗风性能,良好的车桥动力特性及稳定性。The main brldge of the span concrete continuous rigidframe bridge. The rational slope ratio of a highrise pier of the bridge gradually decreases with the increase of the pier height. The arrangement of the cross tie beam on the pier is good to improve the integrity of the pier, but at the same time, will increase the temperature internal forces in the inclined legs of the pier. To study the mechanical behavior of the pier and the static and dynamic characteristics of the bridge, the ANSYS was used to carry out the mechanical analysis of the segments in the forked zone and of the cross tie beam. The a nalysis of the vehicle and bridge coupling dynamics, seismic response, wind resistance behavior and spatial structure of the bridge at both the construction and operation stages was also made. The results of the analysis show that the mechanical behavior of the principal segments of the pier can meet the requirements. The mechanical behavior of the Ashape highrise pier and long span concrete continuous rigidframe bridge is rational and the transverse rigidity is great. The bridge is well adapted to the topography of the bridge site, is costsaving, has good seismic and wind re sistance behavior as well as good vehicle and bridge dynamics and stability.

关 键 词：铁路桥 连续刚构桥 A形桥墩 应力 地震反应分析 抗风性能 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]