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Title |
Analysis of Nonlinear Behavior and Reliability of PSSC Composite Girder Bridge
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Keywords |
합성거동 ; 한계상태함수 ; 신뢰도지수 ; PSSC 거더 ; 프리스트레스 ; Composite behavior ; Limit state function ; Reliability index ; PSSC girder ; Prestressing |
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Abstract |
Member force, strain and stress distribution of a section are obtained for prestressed steel and concrete(PSSC) composite bridge subjected to dead and live load in order to interpret the effect of prestressing and deformation of tendon. The stress and strain distribution and moment capacity are obtained for both noncomposite and composite section and for allowable stress limit state, yield limit state and strength limit state. Reliability analysis is conducted after assuming limit states for deflection, stress and flexural strength. Comparing that the reliability index for stress is near 0 for example section which is designed to satisfy the allowable stress exactly, the reliability indexes for deflection and flexural strength are high. Reliability of PSSC girder which is designed based on allowable stress of bridge design code is high for deflection and flexural strength.
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