混合梁斜拉桥钢混结合段传力机理研究  

Force transfer mechanism for steel-concrete composite structures of hybrid cable-stayed bridges

作　　者：张仲先[1] 黄彩萍[1] 徐海鹰[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5期117-120,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：基于南昌英雄大桥主梁钢混结合段模型试验,研究了斜拉桥钢混结合段的应力分布和传力机理,推理可知钢板与混凝土的结合方式对钢混结合段传力机理具有重要影响.根据钢板与混凝土之间2种不同的结合方式,研究了钢混结合段2种不同的传力机理,并建立了2个相应的有限元计算模型.通过模型实验值和2种有限元模型计算值的对比分析,得出以下结论:钢混结合段钢板与混凝土协同工作性能、混凝土密实性直接关系到钢混结合段传力路径和传力机理;钢混结合段混凝土密实性越好,钢混结合段安全性能越高.Combined with the model test of Nanchang Yingxiong Bridge main beam steel-concrete composite structure, the stress distributing and force transfer mechanism was studied. Result show that the combination mode of the steel plate and concrete attaches great influence on the force transfer mechanism of the steel-concrete composite structure. Based on the two difference combination modes of the steel plate and concrete, the two difference force transfer mechanism was studied, and established two relevant finite element calculating models. Through the comparative analysis between the static experiment measured result and the two difference finite element calculation results, the results show that the coordinated working performance between steel plate and the concrete density of the concrete is directly related to the force transfer path and transfer mechanism, and the better the concrete density the higher safety performance of the steel-concrete composite structure.

关 键 词：斜拉桥 钢混结合段 模型试验 传力机理 传力路径 应力分布 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]