Reliability Analysis of Prestressed Bridge Girders: Comparison of Chinese Codes (1989), (2004), and AASHTO LRFD Specifications (2005)
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Published:2007
Genmiao Chen, Jingjuan Li, George Morcous, Andrzej S Nowak, 2007. "Reliability Analysis of Prestressed Bridge Girders: Comparison of Chinese Codes (1989), (2004), and AASHTO LRFD Specifications (2005)", Bridge design, construction and maintenance: Proceedings of the two day international conference organised by the Institution of Civil Engineers and held in Beijing on 17–18 September 2007, Robert Lark
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The objective of this paper is to evaluate the flexure capacity reliability level for prestressed concrete bridge girders designed using old Chinese Bridge Code (CBC 1989), new Chinese Bridge Code (CBC 2004), and USA AASHTO LRFD Bridge Specifications (AASHTO LRFD 2005). Typical I-girders with variable section-dimensions, span lengths and spacing are considered. Rachwitz-Fiessler method is applied to analyze the reliability indices, β, defined as a function of probability PF: β=Φ-1 (PF). Considerable differences existing in the three codes unavoidably lead to different reliability levels for designing a bridge. The conclusions drawn from the reliability analysis and comparisons may provide helpful guidance for the evaluation of bridges under old Chinese code (CBC 1989) and new one (CBC 2004); also provide a reference between Chinese code and USA code.
Abstract
Introduction
Load model
Resistance model
Reliability Analysis
Conclusion
References
