Effects of SWS Strength and Concrete Air Void Composite Defects on Performance of CFST Arch Bridge Rib
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-18, 18 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-14
Country of Publication
Egypt
No. of Pages
18
Main Subjects
Abstract EN
Most large-diameter concrete-filled steel tube (CFST) arch bridges adopt spiral-welded steel tubes for technical and economic reasons.
However, during the steel tube manufacturing process, the welding temperature and other factors lead to a decreased spiral-welded seam (SWS) strength initially.
Furthermore, for the CFST arch bridges using ordinary concrete, the laitance and air void defects inevitably appear, especially 20 years ago when there was no air-entraining agent in China.
This paper presents a group of scale model experiments and finite element model analysis of the bearing capacity of a serviced CFST arch bridge rib with decreased SWS strength and concrete air void composite defects, under small eccentric axial compression on ultrasonic scanning field data.
Parametric analyses were also performed to investigate the influence of the air void and SWS strength on the bearing capacity of the rib.
Finally, a new ultimate strength index of the rib with composite defects was proposed, and a simplified formula was presented to estimate the effects of the air void and SWS strength decrease on the ultimate strength of the CFST arch bridge rib.
American Psychological Association (APA)
Lu, Zhengran& Guo, Chao. 2020. Effects of SWS Strength and Concrete Air Void Composite Defects on Performance of CFST Arch Bridge Rib. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-18.
https://search.emarefa.net/detail/BIM-1197762
Modern Language Association (MLA)
Lu, Zhengran& Guo, Chao. Effects of SWS Strength and Concrete Air Void Composite Defects on Performance of CFST Arch Bridge Rib. Mathematical Problems in Engineering No. 2020 (2020), pp.1-18.
https://search.emarefa.net/detail/BIM-1197762
American Medical Association (AMA)
Lu, Zhengran& Guo, Chao. Effects of SWS Strength and Concrete Air Void Composite Defects on Performance of CFST Arch Bridge Rib. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-18.
https://search.emarefa.net/detail/BIM-1197762
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1197762