东平大桥钢一混凝土结合段模型试验
占玉林 ，赵人达 ，毛学明 ，董碧霞。
(1．西南交通大学桥梁工程系，四川成都610031；2．中铁大桥勘测设计院有限公司，
湖北武汉430050；3．西南电力设计院，四川成都610021)
摘要：为研究钢一混凝土结合段全过程受力性能，结合东平大桥实桥，根据等效原则设计并
完成了一榀钢～ 混凝土结合段模型试验。模型比例采用1：2．5，混凝土梁肋部分为T形截面，结
合段采用钢箱混凝土横粱过渡。钢与混凝土粘结界面采用PBL剪力连接件构造，并辅以纵向预应
力筋共同作用。试验过程进行了静力、疲劳和破坏3个阶段的加载。试验结果表明：设计荷载作用
下，结合段具有良好的强度和刚度，应力水平较低；疲劳荷栽作用下，结合段的混凝土表层会有微小
裂纹出现，但结构整体刚度依然良好；破坏荷载相对于设计荷载具有较高的安全储备。
关键词：拱桥；钢～ 混结合段；应力；挠度；疲劳；裂纹；模型试验
中图分类号：U448．22；TU317 文献标志码：A
Model Test of Steel and Concrete Joint
Section of Dongping Bridge
ZHAN Yu-lin ，ZHAO Ren-da ，M AO Xue—m ing ，DONG Bi—xia。
(1．Department of Bridge Engineering，Southwest Jiaotong University，Chengdu 610031，China；
2．China Railway Major Bridge Reconnaissance& Design Institute Co．，Ltd．，Wuhan 430050，
China；3．CPECC Southwest Electric Power Design Institute，Chengdu 610021，China)
Abstract：To study the whole process mechanical behavior of steel and concrete j oint sec—
tions，in accordance with the actual Dongping Bridge and on the principle of equivalence，the
model test of a steel and concrete joint section was designed and carried out．The scale of the
model is 1：2．5．The part of the concrete girder rib is the T—shape section and the transition at
the joint section is the concrete—filled steel box cross beam．At the connection interface of the
steel and concrete，the PBL shear connectors were used and the longitudinal prestressing tendons
were arranged as well to j oin in the action of the shear connectors．In the model test，three stages
of the static load，fatigue load and failure load were applied．The results of the test indicate that
under the designed load，the j oint section has good strength and rigidity and the stress levels are
low．Under the fatigue load，microcracks appear in the surface of the concrete of the joint see—
tion，however,the global rigidity of the structure is still all right and relatively to the designed
1oad，the failure load has rather high safety margin．
Key words：arch bridge；steel and concrete j oint section；stress；deflection；fatigue；crack；

因本站资料资源较多，启用了多个文件服务器，如果浏览器下载较慢，请调用迅雷下载，特别是超过了5M以上的文件！请一定调用迅雷，有时候速度就会飞起哦，如果您的浏览器自动加载了PDF预览，文件太大又卡死，请按下载说明里的把PDF插件关闭了就可以直接下载，不会再预览了！