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Probabilistic risk assessment for the construction phases of a PSC box girder railway bridge system with six sigma methodology

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KSCE Journal of Civil Engineering Aims and scope

Abstract

Currently the control of prestressing force and cracks on concrete structures is designed deterministically. However, the statistical variations of materials could make additional error in the prediction and the control of errors. Therefore, to develop a probabilistic risk assessment technique in Prestressed Concrete (PSC) box girder railway bridges, the important random variables are determined by an Analytical Hierarchy Process (AHP) method for the risk assessment of the target PSC box girder bridge constructed by a Movable Scaffolding System (MSS) method. The limit state functions are determined to investigate the risk of tensile cracks in upper and lower flange concrete, just after the moving of scaffolding, and the risks of the prestressing loss at each construction stage. In order to compose the implicit limit state function of the target PSC railway bridge, the developed linear adaptive weighted response surface method combined with a first order second moment method is applied for the evaluation of reliabilities of the considered limit states.

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Cho, T., Lee, JB. & Kim, SS. Probabilistic risk assessment for the construction phases of a PSC box girder railway bridge system with six sigma methodology. KSCE J Civ Eng 15, 119–130 (2011). https://doi.org/10.1007/s12205-011-0675-1

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  • DOI: https://doi.org/10.1007/s12205-011-0675-1

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