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A Study on the ALFD Design of Rolled Beams  

Chung, Kyung-Hee (한국철도대학 철도시설토목과)
Kim, Jin-Sung (인덕대학교 건설정보시스템)
Yang, Seung-Ie (콜로라도 주립대 토목환경학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.7, no.4, 2003 , pp. 91-97 More about this Journal
Abstract
The maximum moment may occur at interior supports of continuous bridges. If the bigger moment is applied on them, a local yielding at interior supports may occur. They may show plastic behaviors, and the moment will be redistributed. The strength design, L.F.D., redistributes 10% of the negative moment which is obtained from the elastic analysis. However, A.L.F.D method computes the moment which is redistributed. This moment is called automoment. The moment-rotation curve is needed to find automoment. In this paper moment-rotation curve for compact sections suggested from AASHTO Guide Specifications is used to find automoment. Based on A.L.F.D. limit states specification method, a three-span continuous bridge is designed.
Keywords
rolled beam; compact section; automoment; service load; overload; maximum load; moment-rotation curve; local yielding;
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