- CSCD核心中文核心科技核心
- RCCSE(A+)公路运输高质量期刊T1
- Ei CompendexScopusWJCI
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公路隧道钢管混凝土拱架承载力评价指标及合理选型研究
（1. 西南交通大学 交通隧道工程教育部重点实验室， 四川 成都 610031； 2. 中铁第四勘察设计院集团有限公司，湖北 武汉 430063； 3. 西南科技大学土木工程与建筑学院， 四川 绵阳 621010； 4. 中国电建昆明勘察设计研究院有限公司， 云南 昆明 650051）
网络出版日期: 2021-04-30
基金资助
高铁联合基金资助项目（U1934213）； 中国铁路总公司科技研究开发计划项目重大课题（2017G006-B）； 中铁第四勘察设计院集团有限公司科研项目（2018K84-1）
Evaluation Indices for Bearing Capacity of Concretefilled Steel Tube Arch in Highway Tunnel and Reasonable Type Selection
(1.Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;2.China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Hubei,China;3.School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;4.PowerChina Kunming Survey and Design Institute Co., Ltd., Kunming 650051, Yunnan, China)
Online published: 2021-04-30
张俊儒 , 王智勇 , 任兆丹 , 孔超 , 徐向东 , 吴洁 . 公路隧道钢管混凝土拱架承载力评价指标及合理选型研究[J]. 隧道建设, 2021 , 41(4) : 569 -578 . DOI: 10.3973/j.issn.2096-4498.2021.04.006
The concretefilled steel tube is characterized by high strength and good plastic toughness. Present, the research on the evaluation index of bearing capacity of concretefilled steel tube arch frame is insufficient; thus, selecting steel tube is difficult. To promote the application of concretefilled steel tube structure in tunnel engineering, based on the comparative analysis of the theoretical calculation and numerical simulation of the bearing capacity of 50 concretefilled steel tubular arches with different diameters and wall thicknesses, the evaluation indices and reasonable selection of the concretefilled steel tubular arches for highway tunnels are studied. The results show the following: (1) Compared with the area, steel content and moment of inertia of steel tubes, the flexural section coefficient of steel tubes as a comprehensive index can find the relationship between the bearing capacity of steel tubes and concretefilled steel tubes, and it is used as an index to evaluate the bearing capacity of concretefilled steel tubes. (2) Based on the research results, the formula of flexural section coefficient of the steel tube and the bearing capacity of concretefilled steel tube arch and that of the bearing capacity of the primary support and the concretefilled steel tube arch are fitted. (3) The diameter of the steel tube has a greater effect on the bearing capacity of concretefilled steel tube arches than the thickness of the steel tube. The largediameter and thinwall concretefilled steel tube arches have a higher bearing capacity, and it is economical. (4) It is suggested that the concretefilled steel tube arch is selected based on the following priority order: large diameter, large thickness, and improved core concrete strength.
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