Flexural behavior of composite box girders with corrugated steel webs and trusses. (15th April 2020)

• Record Type: Journal Article
• Authors: Chen, Yiyan; Dong, Jucan; Tong, Zhaojie; Jiang, Ruijuan; Yue, Ying
• Is Part Of: Engineering structures. Volume 209(2020)
• Publication Date: 2020-04-15
• Subjects: Composite box girder with corrugated steel webs and trusses -- Flexural behavior -- Flexural stiffness -- Numerical analysis -- Nonlinear analysis; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2020.110275
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Two 1:5 scale models of composite beams with CSWs and trusses are tested. The effects of bottom trusses and concrete in steel tubes are examined. Finite element simulation is used to simulate the full behavior of tested specimens. Theoretical model is developed to predict the nonlinear behavior. Abstract: The composite box girder with corrugated steel webs (CSWs) and trusses is a bridge structure developed on the basis of traditional box girders with CSWs. In this research, experimental, numerical and analytical studies were carried out to investigate the flexural performance of simply supported composite box girders with CSWs. Two 1:5 scale models of a real bridge were fabricated and tested, including one with concrete filled steel tubes and another with hollow steel tubes. The test results show that the two specimens have good ductility and failed in a ductile manner. The concrete filled inside steel tubes reduces the deflection and increases the yield load. The cross sections of the two specimens basically satisfy the "plane section assumption". Finite element models were also developed for the two specimens and validated based on the experimental results. Afterwards, a parametric study was carried out with the validated finite element models, which shows that the steel ratios and the structure of bottom trusses strongly influences the flexural behavior. At last, a theoretical model is developed to calculate the bending moment of composite beams at the ultimate load.