自锚式悬索桥主缆钢锚箱设计及受力分析  

Design and Stress Analysis of Main Cable Steel Anchor Box of Self--anchored Suspension Bridge

作　　者：莫山峰[1] 郑力[1] 唐学庆[1] MO Shanfeng;ZHENG Li;TANG Xueqing(Design Institute of Civil Engineering&Architecture of Dalian University of Technology Co.,Ltd.,Dalian,Liaoning 116023,China)

机构地区：[1]大连理工大学土木建筑设计研究院有限公司,辽宁大连116023

出　　处：《山西交通科技》2024年第5期109-112,共4页Shanxi Science & Technology of Transportation

摘　　要：自锚式悬索桥以其优美的造型广泛应用于市政、公路工程中,针对主缆锚固区构造复杂、应力集中的特点,采用大型有限元分析软件midas FEA对松花江特大桥主缆钢锚箱结构进行计算分析。结果表明:主缆钢锚箱采用铸钢承压体与格构式钢结构组合的结构形式设计合理,传力途径明确;与主梁腹板焊接连接的铸钢承压体前缘的横向锚板是主缆钢锚箱传力的关键构件,其与主梁腹板焊接处存在应力集中的现象,结构设计时注意尽可能增加此构件的设置数量并采用有效的构造措施缓解应力集中现象。Due to the beautiful structure,the self-anchored suspension bridge has been widely applied in municipal and highway engineering.Focusing on the characteristics of the complex structure and stress concentrate of the main cable anchorage zone,this paper used the midas FEA to calculate and analyze the structure of the main cable steel anchor box of Songhua River Bridge.The results showed that it was reasonable that the main cable steel anchor box adopted the combination structural form design of the cast steel pressure body and lattice-type steel structure,and the force transmission path was clear.The transverse anchor plate of the leading edge of the cast steel pressure body welded with the main beam web was the key component of the force transmission to the main cable steel anchor box,and the stress concentration occurred at the welding position.So,in the structural design process,the number of transverse anchor plates should be increased as much as possible,and effective tectonic measures should be adopted to alleviate the stress concentration.

关 键 词：自锚式悬索桥 主缆钢锚箱 传力途径 有限元分析 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]