Browse > Article

Interaction Analysis between Tapered Sectional Launching Nose and Superstructure Section of ILM Concrete Bridge  

Lee Hwan-Woo (부경대학교 건설공학부)
Jung Du-Hwoe (부경대학교 건설공학부)
Ahn Tae-Wook (하경엔지니어링 구조부)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.19, no.2, 2006 , pp. 139-150 More about this Journal
Abstract
ILM(incremental launching method) bridge is one of the prestressed concrete bridge construction methods widely adopted owing to its effectiveness for the quality control. The sections of the launched superstructure pass every position of the bridge spans. This launching process causes the bridge sections to be experienced in the quite different stress states with the stress state occurred after construction completely. Due to the self weight of sections, particularly, the superstructure sections(deck) experience maximum positive and negative moment as well as maximum shear force during launching process. To minimize the temporarily caused sectional forces, launching nose is generally used in the construction method. Therefore, the magnitude of this sectional forces should be checked for the safety of super structure in construction and it is dependent on the structural characteristics of launching nose. In this study, the simplified formulas to analyze the sectional force occurred by the nose-deck interaction in ILM construction are developed. The considering parameters are the span length ratio, stiffness ratio and weight ratio between the launching nose and the super structure. In particular, the developed formulas can consider the tapered sectional shape of launching nose and the diaphragm wall in the superstructure. Additionally, the sensitivity analysis is performed to analyze the effects of nose-deck interaction according to the design parameters.
Keywords
incremental launching method; nose-deck interaction; simplified formula; sensitivity analysis of design parameters;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Gohler, B., Pearson, B. (2000) Incrementally Launched Bridge, Ernst & Sohn
2 Rosignoli, M. (1997) Influences of the Incremental Launching Construction Method on the Sizing of Prestressed Concrete Bridge Decks. Proc. Instn Civ. Engrs. Structs & Bldges., 122(3) pp.316-325
3 Rosignoli, M. (1999) Presizing of Prestressed Concrete Launched Bridge. ACI Structural Journal, 96(5) pp.705-710
4 건설교통부 (2005) 도로교설계기준, 한국도로교통협회
5 Sasmal. S., Ramanjaneyulu. K., Srinivas. V., Gopalakrishnan, S. (2004) Simplified Computational Methodology for Analysis and Studies on Behaviour of Incrementally Launched Continuous Bridges. Structural Engineering and Mechanics. 17(2)
6 김용훈, 김씨동, 정승훈 (1999) ILM 공법을 적용한 장폭(B=19.5m) 1Cell PSC Box Girder의 낙단대교 상부공 설계사례, 한국전산구조공학회학회지, 12(3) pp.95-101
7 (주)마아다스아이티 (2003) MIDAS/CIVIL, (주)마이다스아이티
8 Rosignoli, M. (1997) Incremental Bridge Launching. Concrete Int. 19(2) pp.36-40
9 안태욱, 양성운, 이환우 (2003) ILM 교량의 압출추진코와 교량 상부구조와의 상호작용, 가을 학술발표회 논문집, 대한토목학회, pp.709-714
10 Rosignoli , M. (998) Nose-Deck Interaction in Launched Presstressed Concrete Bridge, Bridge Engineering, pp.21-27