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，介绍了大跨度钢箱梁斜拉桥索梁锚固结构的常见连接型式——锚箱式、销铰式、锚拉板式和锚管式。概述了不同连接型式的构造特点及有限元计算、静载试验和疲劳试验方法。分析了四种锚固结构的传力机理和应力集中现象，提出了合理传递索力和减小应力集中现象的构造措施，明确了设计中应注意的问题。

Development and Application of Cable Beam Anchorage Structure in Long Span Steel Box Beam Cable-stayed Bridges

The cable anchorage zone is a key part of the control design of cable-stayed bridges, and many large-span cable-stayed bridges at home and abroad have conducted specialized analysis and research on the anchorage zone. Based on engineering examples, this paper introduces the common connection types of cable beam anchorage structures for large-span steel box girder cable-stayed bridges - anchor box type, pin hinge type, anchor plate type, and anchor pipe type. Summarized the structural characteristics and finite element calculation, static load testing, and fatigue testing methods of different connection types. Analyzed the force transmission mechanism and stress concentration phenomenon of four types of anchoring structures, proposed structural measures for reasonable transmission of cable force and reduction of stress concentration phenomenon, and clarified the issues that should be paid attention to in design