建筑钢结构进展2025，Vol.27Issue(3)：32-37,45,7.DOI:10.13969/j.jzgjgjz.20231009001
混合梁斜拉桥开口格室结合部承载性能试验研究
Experimental Study on Bearing Properties of the Composite Joint with Opened Cell Used in Hybrid Girder Cable-Stayed Bridges
王太奇 1王淑敏 2马广 2杨欣然 2刘玉擎1
作者信息
- 1. 同济大学 土木工程学院,上海 200092
- 2. 中国铁路设计集团有限公司,天津 300308
- 折叠
摘要
Abstract
To investigate the load-bearing capability of an opened cell steel-concrete composite joint,two reduced-scaled composite joints were specially designed based on the steel-concrete composite joint of Dongping hybrid cable-stayed bridge in the Guangzhan high-speed railway and subjected to axial compression capacity tests.The failure mode,relative slip curve between steel bottom plate and concrete,and strain distribution were explored,and the influence of using stud and notched perfobond connector on the bearing capacity of steel bottom plate was compared.The results show that the bearing capacity of the specimen is about 6.8 times that of the actual bridge design.The specimen using stud on the steel bottom plate is about 6%higher than that of the specimen using notched perfobond connector.Notably,the failure mode of both specimens is predominantly characterized by compression failure of concrete,with the connectors not being sheared off,indicating that the influence of connector type on the bearing capacity and failure mode of the joint is not significant.The concrete near the bearing plate of the two specimens was not crushed due to local pressure during the loading process,and the steel bottom plate was still in an elastic stage when the specimens were damaged.The notched perfobond connector can enhance the bonding performance between the steel bottom plate and concrete.关键词
混合梁斜拉桥/开口格室结合部/焊钉/槽口型开孔板/承载性能Key words
hybrid girder cable-stayed bridge/opened cell composite joint/stud/notched perfobond connector/load-bearing capacity分类
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王太奇,王淑敏,马广,杨欣然,刘玉擎..混合梁斜拉桥开口格室结合部承载性能试验研究[J].建筑钢结构进展,2025,27(3):32-37,45,7.
