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Title |
Comparison of Reliability of PSSC Girder Bridge for Different Limit States
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Keywords |
PSSC girder; Prestressing; Limit state function; Reliability index; PSSC 거더; 프리스트레스; 한계상태함수; 신뢰도지수 |
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Abstract |
Reliability analysis of prestressed steel and concrete(PSSC) girders is conducted for deflection. stress and moment strength limit state. PSSC girder has strong advantages in terms of construction cost and vertical clearance for the span length of over 40 meters. In this paper, example PSSC girders with different span lengths, section dimensions and design stress levels are designed and analyzed to calculate the midspan deflection, stress and the section moment strength. Deflection limit state, stress limit state and strength limit state functions are assumed and the reliability indexes are obtained by Monte-Carlo simulation and Rackwitz-Fiessler procedure. The results show that the reliability of PSSC girder for deflection limit state is appropriately higher than the stress limit state and the reliability for moment strength is significantly conservative.
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