Flexural Behavior of PSC Beam Using High Strength Concrete

고강도 PSC BEAM 교량의 휨거동

  • 정원기 (정회원, 동아건설산업(주) 기술연구소) ;
  • 이형준 (정회원, 한국도로공사 도로연구소) ;
  • 이규정 (정회원, 동아건설산업(주) 기술연구소) ;
  • 윤석구 (정회원, 한국도로공사 도로연구소) ;
  • 한승환 (정회원, 한국도로공사 도로연구소) ;
  • 김기수 (정회원, 쌍용양회공업(주) 중앙연구소)
  • Published : 1998.10.01

Abstract

Structural tests of the PSC Beam bridge using high strength concrete, concrete compressive strength 700kg/$\textrm{cm}^2$, are conducted for the application including durability and serviceability of the bridge. Current design safety factors with respect to the jacking force and the service design load DB-24 are applied to the design of the bridge. Concrete compressive strength 700kg/$\textrm{cm}^2$, girder depth 2.3m, girder space 3.2m, span length 20m, and slab thickness 27cm are selected for the bridge test. The Bulb-Tee section of the girders is applied instead of I section because it is well known more stable to the longer span(40m). Static load test(4 beams) with composite and non-composite section, and fatigue load test(1 beams) with composite section are conducted. Crack moment, ultimate load, deflections with load steps, and strains of the beam section for those bridges are investigated. The structural test results of the bridges showed a good performance for a safety and a serviceability.

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