3경간 합성 I-Beam교의 ALFD해석에 관한 연구 = A Study of ALFD Analysis by Three Span Composite I-Beam Girder

다국어 초록 (Multilingual Abstract)

In recent structural design there is a smooth transition from working stress design to strength design. In accordance with this trend the limit state design in Europe and the load factor design in America were developed and used in the structural design. In Korea the strength design in the name of load factor design was adopted in the appendix of roadway bridge standard specifications in 1993.
In this paper the 10% negative bending moment and the actual auromomenr occurred on the interior supports of continuous I-beam or plate girder bridges in which the section is compact were compared. In the comparison process the strength design was applied.
In addition, the effect on the auromomenr of reinforcing bars plated in the concrete slab along the longitudinal direction of the bridge was investigated. The Korean roadway bridge standard specification suggests to plate the reinforcing bars as much as 2% of effective concrete slab area. Bur the AASHTO LFD Specifications recommends to plate 1 % instead of 2%.
The section determined by the ALFD is approximately 17% smaller than the section obtained based on the Korean roadway bridge standard specifications. If reinforting bars are plated as much as 2% instead of 1% suggested in the AASHTO specifications the automoments generated by the plastic deformation due to the local yielding at the interior supports were much smaller from which the advantage of auromomenrs caused by the residual stresses tan nor be utilized effectively.

목차 (Table of Contents)

• 目次
• 1. 서론
• 2. 기본해석이론
• 2.1 잔류응력
• 2.2 내측지점에서 휨부재의 거동
• 2.3 비탄성회전각에 의한 자생모멘트의 발생과정
• 2.4 자생모멘트의 계산방법
• 3. 설계
• 3.1 구조물의 하중단계 수행조건
• 3.2 설계예
• 4. 결론
• 참고문헌
• Abstract