Steel and Composite Structures

  • 제46권6호
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  • Pages.745-757
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  • 2023
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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Experimental study on fatigue behavior of innovative hollow composite bridge slabs

  • Yang Chen (Department of Civil Engineering, Shanghai University) ;
  • Zhaowei Jiang (Department of Civil Engineering, Shanghai University) ;
  • Qing Xu (Department of Civil Engineering, Shanghai University) ;
  • Chong Ren (Department of Civil Engineering, Shanghai University)
  • 투고 : 2022.06.30
  • 심사 : 2023.03.12
  • 발행 : 2023.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

In order to study the fatigue performance of the flat steel plate-lightweight aggregate concrete hollow composite bridge slab subjected to fatigue load, both static test on two specimens and fatigue test on six specimens were conducted. The effects of the arrangement of the steel pipes, the amplitude of the fatigue load and the upper limit as well as lower limit of fatigue load on failure performance were investigated. Besides, for specimens in fatigue test, strains of the concrete, residual deflection, bending stiffness, residual bearing capacity and dynamic response were analyzed. Test results showed that the specimens failed in the fracture of the bottom flat steel plate regardless of the arrangement of the steel pipes. Moreover, the fatigue loading cycles of composite slab were mainly controlled by the amplitude of the fatigue load, but the influences of upper limit and lower limit of fatigue load on fatigue life was slight. The fatigue life of the composite bridge slabs can be determined by the fatigue strength of bottom flat steel plate, which can be calculated by the method of allowable stress amplitude in steel structure design code.

키워드

과제정보

The research was sponsored by the National Natural Science Foundation of China (Program No.52108156), the Opening Fund of State Key Laboratory of Green Building in Western China (Project No. LSKF202215) and also supported by the Program for Innovative Research Team of Shanghai University.

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