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Title |
Evaluation of the Load Carrying Capacity on a Rahmen Bridge with Ultra-high Strength Centrifugally Formed Square Beams as the Superstructure
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Authors |
이두성(Doo-Sung Lee) ; 김성진(Sung-Jin Kim) ; 김정회(Jeong-Hoi Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.1.61 |
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Keywords |
원심성형; 내하력; 현장재하시험; 초고강도 콘크리트; 라멘교 Centrifugal molding; Load carrying capacity; Field load test; Ultra high strength concrete; Rahmen bridge |
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Abstract |
An ultra-high strength prestressed prismatic beam of 100 MPa in compressive strength was developed by increasing the water-tightness of concrete by utilizing centrifugal molding processes without adding expensive admixtures. The centrifugal prismatic PSC beam developed as the superstructure of the avalanche tunnel was constructed on a rahmen bridge in a small local river. In this study, the centrifugal prismatic beam was compared and analyzed based on the results of measurements made through static load tests and the results of numerical analysis of the target structure. The common load-carrying capacity and safety of the rahmen bridge were evaluated. The static·dynamic load tests and finite element analysis results of this bridge were similar, and it was confirmed that the behavior of the centrifugal prismatic beam was well simulated. All centrifugally formed square beams that make up the composite rahmen bridge were evaluated to secure sufficient load carrying capacity under the design live load, and structural reliability was proven by ensuring safety.
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