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A platform for research: civil engineering, architecture and urbanism
Destructive Test Study of a Prestressed Concrete Hollow Slab Beam Bridge
Actual bridge destructive tests are of great significance to investigate the mechanical behavior and failure mechanism of existing bridges under ultimate loads. However, the field destructive experiments were seldom carried out up to now due to the limitations of test opportunities, cost and difficulties. In this research, a prestressed concrete hollow slab beam bridge, East Meng Jiang Nu Bridge, was used for full-scaled destructive test, which would soon be dismantled owing to the relocation of expressway. The test scheme, including loading method and instruments arrangement, was prescribed in detail, and the law of deflection change, strain variation and crack propagation of the bridge were systematically discussed, as well as the failure process and mode. The results showed that the actual bearing capacity of the bridge was much higher than the theoretical value, the failure of concrete hinge points was the major factor which led to the loss of structural integrity, and the guardrails had significant influence on the failure mode and bearing capacity of the bridge with its strengthening effects on superstructure. The study of this paper will provide technical reference for similar bridges in such aspects as maintenance and reinforcement, ultimate state research and load-carrying capacity assessment.
Destructive Test Study of a Prestressed Concrete Hollow Slab Beam Bridge
Actual bridge destructive tests are of great significance to investigate the mechanical behavior and failure mechanism of existing bridges under ultimate loads. However, the field destructive experiments were seldom carried out up to now due to the limitations of test opportunities, cost and difficulties. In this research, a prestressed concrete hollow slab beam bridge, East Meng Jiang Nu Bridge, was used for full-scaled destructive test, which would soon be dismantled owing to the relocation of expressway. The test scheme, including loading method and instruments arrangement, was prescribed in detail, and the law of deflection change, strain variation and crack propagation of the bridge were systematically discussed, as well as the failure process and mode. The results showed that the actual bearing capacity of the bridge was much higher than the theoretical value, the failure of concrete hinge points was the major factor which led to the loss of structural integrity, and the guardrails had significant influence on the failure mode and bearing capacity of the bridge with its strengthening effects on superstructure. The study of this paper will provide technical reference for similar bridges in such aspects as maintenance and reinforcement, ultimate state research and load-carrying capacity assessment.
Destructive Test Study of a Prestressed Concrete Hollow Slab Beam Bridge
Wang, Fu Ming (author) / Kang, Sheng Zhen (author) / Cai, Ying Chun (author) / Li, Xiao Long (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
2011-05-16
Conference paper
Electronic Resource
English
Destructive Test Study of a Prestressed Concrete Hollow Slab Beam Bridge
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