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Title |
Analysis of Prestress Effect and Reliability of PSSC Composite Girder Bridge
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Keywords |
성거동 ; 한계상태함수 ; PSSC 거더 ; 프리스트레스 ; 신뢰도지수 ; Composite ; Limit state function ; PSSC girder ; Prestressing ; Reliability index |
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Abstract |
Member force, strain and stress distribution of a section are obtained for optimized standard 25m~45m 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 stress and flexural strength. The reliability index for standard PSSC composite bridge which is designed to satisfy the allowable stress for flexural strength are higher than 3.5 which is required reliability indexes on American code for LRFD. Reliability of PSSC girder which is designed based on allowable stress of bridge design code is high for flexural strength.
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