Analysis of PSC Beam Bridges Strengthened by External Post-Tensioning Method

외부 후긴장된 PSC보 교량의 해석방법

  • 김광수 (한국건설기술연구원 연구원) ;
  • 박선규 (성균관대학교 토목공학과) ;
  • 김형열 (한국건설기술연구원) ;
  • 전찬기 (시립인천전문대학 토목공학과)
  • Published : 1999.04.01

Abstract

An improved finite element modeling technique is proposed for the assessment of load carrying capacity partilly prestressed concrete beam bridges. Based on the finite element method of analysis, shell and frame elements are utilized to model the slab and beams of the superstructure, respectively. In the modeling of superstructure, the emphasis is placed on the use of rigid link between the middle surface of slab and mid-plane of beam. This paper also includes the comparision of three different equations that used in the calculation of effective moment of inertia for the partially prestressed concrete beams. Numerical analysis is performed for the unstrengthened and strengthened bridges. The obtained results are compared with those of load test for a prototype bridge. Agreement with the numerical solutions by using the proposed method and load test results is generally excellent.

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