舟山桃夭门大桥钢与混凝土结合段模型试验研究

Model tests on steel-concrete joining section of main girder of a cable-stayed bridge

混合梁斜拉桥中结合段的连接形式是非常重要的构造。本论文结合桃夭门大桥,采用1∶2的缩尺,对结合段进行了模型试验研究,通过试验,研究了截面正应力分布规律、抗裂性,剪滞效应,应力的纵向传递、剪应力分布等,得到了许多有价值的试验数据,对实桥设计起到了很大的指导作用。

Proper treatment of the joining sections of the main girders is one of the major concerns in the design of a cable-stayed bridge. In order to find an effective means of treatment, one must understand the detailed structural response of the joining sections when subjected to loading. This paper presents the model tests of the joining sections of the main girders of the Taoyaomen Bridge （a cable-stayed bridge） in Zhoushan, China, The model was in the scale of 1：2 in dimensions. In the experiments, distributions of normal sectional stresses, anti-cracking ability, shear lag effect and shear stress distributions were carefully measured and the test data were investigated. The findings from the tests were of guiding significance to the design of the bridge.