大跨度钢箱梁斜拉桥索梁锚固结构的发展与应用

拉索锚固区是斜拉桥控制设计的关键部位,国内外许多大跨度斜拉桥均对锚固区开展了专门的分析研究。结合工程实例,介绍大跨度钢箱梁斜拉桥索梁锚固结构的常见连接形式、构造特点及有限元计算、静载试验和疲劳试验方法。分析4种锚固结构的传力机理和应力集中现象,提出合理传递索力和减小应力集中现象的构造措施,明确设计中应注意的问题。

Development and Application of Anchor Structure for Cable and Girder of Long Span Steel Box Girder Cable-Stayed Bridge

The anchor zone of stay cables is a critical part that governs the design of cable-stayed bridge,and special efforts have been made to analyze and study the parts of lots of long span cable-stayed bridges at home and abroad.With reference to the practical bridge examples,this paper describes the commonly-used connecting types,structural features,finite element calculations and static load and fatigue load test methods for the anchor structure of long span steel box girder cable-stayed bridge,analyzes the force transmitting mechanism and stress concentration phenomenon of four types of the anchor structures,gives the measures for rational transmission of the forces and reduction of the stress concentration and also clarifies the problems to which attention should be paid in the design.