混合梁斜拉桥钢混结合段静力试验研究  

Static experiments of steel-concrete composite structure of hybrid cable-stayed bridges

作　　者：张仲先[1] 黄彩萍[1] 党志杰[2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]中铁大桥局集团武汉桥梁科学研究院有限公司,湖北武汉430034

出　　处：《华中科技大学学报（自然科学版）》2010年第4期121-124,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：南昌英雄大桥为倾斜独塔空间扭曲背索斜拉桥,为验证其主梁钢混结合段在设计时拟采取的构造措施的合理性,研究结合段在这种构造措施下的受力与变形性能,设计并制作了几何缩尺比为1:2的主梁钢混结合段试验模型.在对模型进行试验研究中,分别考察了在正常使用荷载、设计极限荷载及1.4倍设计极限荷载作用下大桥主梁钢混结合段不同部位不同材料的正应力分布情况及结合段的承载能力,研究结果为大桥主梁钢混结合段的设计和施工提供了重要参考价值和设计依据,取得了良好的效益.The Nanchang Yingxiong Bridge is a cable-stayed bridge with a single leaning tower and special twisted drag cables.In order to verify the rationality of steel-concrete composite construction in the main beam,which was proposed in design,and to study the load carrying performance of the main beam with this construction measure,a model of the composite structure with a scale of 1：2 was designed and constructed for the static experiments.In the experimental study,the normal stress distribution and load bearing capacity of different portions and materials in the composite structure were investigated for the loading scenarios of service limit state,design ultimate limit state and 1.4 times design ultimate limit state respectively.The results of the present study can provide the important reference and basis to the design and construction of steel-concrete composite structure in the main beam of the bridge.

关 键 词：混合梁斜拉桥 主梁钢混结合段 模型试验 应力分布 承载能力 荷载工况 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]