Transcription of SEGMENTAL Box GIRDER: DEFLECTION PROBABILITY AND …
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SEGMENTAL Box GIRDER: DEFLECTION PROBABILITY AND …
SEGMENTAL Box GIRDER: DEFLECTION If creep and shrinkage properties of concrete are predicted solely on the PROBABILITY AND BAYESIAN UPDATING basis of the existing models, the uncertainty is very large. For the BP model (Bazant and Panula 1978, 1980, 1982), errors that are exceeded with a 5%. By Zdenek P. Baiant/ Fellow, ASCE, and Joong-Koo Kim2 PROBABILITY ( on the plus side, on the minus side) are about 37%, while for the simpler but less realistic models of ACI Committee 209/11. ABSTRACT: Probabilistic prediction of the confidence limits on long-time deflec- (1971, 1982) and CEB-FIP (1978) they are 75% and 91%, respectively (BaZant tions and internal forces of prestressed concrete SEGMENTAL box-girder bridges is and Panula 1982; BaZant 1988; Zebich and BaZant 1981).
girder bridge with age differences between its segments and with a change of struc tural system from statically indeterminate to determinate is illustrated numerically. The results prove that design for extreme, rather than mean, long-time deflections
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