Calculation Method of Early-Age Crack Width in Reinforced Concrete Bridge through a Nonlinear FEA Model

A prestressed concrete (PC) box girder with the total length of three span 130 m was constructed by the method of cast-in-place layer by layer with full framing, and the cracking of the top slab in the box room was found during the construction. Cracking is one of the main distresses for a reinforced concrete (RC) bridge, which also reduces the safety and service life of the structure. The existing calculation methods of crack width, which are used to evaluate the crack width induced by the external loads, are not suitable to calculate the early-age crack width. To evaluate the early-age crack width, a calculation method of early-age crack width was presented. The finite element analysis (FEA) model of the PC box girder being built was used to analyze two affecting parameters of early-age cracking by ABAQUS 2017 program. Through the nonlinear FEA model of the PC box girder, the calculation formula of early-age crack width was used to evaluate the crack width. The validity of the nonlinear FEA method has been verified by comparing the simulation results with the measured results.

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  • English

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  • Accession Number: 01717267
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 3 2019 3:06PM