Improved Optimization Formulations for Launching Nose of Incrementally Launched Prestressed Concrete Bridges

Fontán, Arturo; Díaz, J.; Baldomir, Aitor; Hernández, Santiago

doi:10.1061/(asce)be.1943-5592.0000169

Cited by 26 publications

(12 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, the incremental launching method is adopted. Yet, the general incremental launching method is often used for the construction of box girder, the cross-section of which is even, prismatic and continuous [9,10]. When launching the variable cross-section girder in terms of using the general incremental launching method, the main difficulties are described as follows:…”

Section: Project Backgroundmentioning

confidence: 99%

A new Technology for Incremental Launching the Small Curvature Radius Variable Cross-Section Steel Box Girder

Zhang¹,

Guo²,

Wang³

2015

Proceedings of the 2015 6th International Conference on Manufacturing Science and Engineering

View full text Add to dashboard Cite

Abstract. This paper mainly introduces a new technology for incremental launching the small curvature radius variable cross-section steel box girder. To solve the difficulties traditional construction method encountered, new incremental launching method, girder curvature adaptation technology and intelligent surveillance system are researched and developed. By using this technology, launching construction of the small curvature radius variable cross-section steel box girder in urban is practically implemented.

show abstract

Section: Project Backgroundmentioning

confidence: 99%

A new Technology for Incremental Launching the Small Curvature Radius Variable Cross-Section Steel Box Girder

Zhang¹,

Guo²,

Wang³

2015

Proceedings of the 2015 6th International Conference on Manufacturing Science and Engineering

View full text Add to dashboard Cite

show abstract

“…압출추진코의 최적설계를 위한 최적화 기법 (Fontan et al, 2011)이나, 상부구조와 압출추진코의 상호작용이 고려 된 ILM 상부구조 단순 해석식 (Rosignoli, 1998;Lee et al, 2006;2012) 및 예비설계용 최적화 설계식 (Lee et al, 2006;Choi et al, 2008)에 관한 연구가 수행되었다.…”

Section: Ilm 교량 상부구조물 단면의 최적설계를 위해서는 압출 추진코와의 상호작용이 고려된 해석과 압출추진코의 최적설unclassified

Simplified Analysis of Superstructure Section Considering Diaphragm and Optimum Design Conditions for ILM Bridge

Lee

Park²

2014

jcoseik

View full text Add to dashboard Cite

ILM(Incremental Launching Method) bridges pass both the middle of spans and supports during launching. The launching noses are used to minimize the maximum positive moments and negative moments of the superstructure occurring during launching for ILM bridges. In this study, the simplified analysis formula considering diaphragm to calculate the bending moment that occurs during launching is induced and analyzes the optimum design conditions considering diaphragm. The accuracy of the proposed simplified analysis formular compared to the MIDAS Civil has an error of less than 5%. There is a difference up to 13% in the moment between the cases when the diaphragm is considered and is not. In addition, the criteria for deciding the unit weight of equivalent cross section and average stiffness value of equivalent cross section that can be applied to the simplified analysis formula is proposed. In this study, an effective way to optimize the launching nose is proposed that the optimum design is taken in the condition of minimizing the negative moment because of the mechanic characteristic of ILM bridges.

show abstract

“…Due to the excellence on device integration, high bearing capacity and excellent implementation of construction compare to bracket erecting and dragging-type launching method [7][8][9], the bridge girder with a temporary guiding nose [10][11] is capable of being assembled on one side of the obstacle and launched direct to the other side without previous constructing a large number of temporary supports or using large-scale hoisting devices.…”

Section: Introductionmentioning

confidence: 99%

Posture Determination for Bridge Girder and Distributed Incremental Launching Devices

Zhang¹,

Zhang²,

Chen³

et al. 2015

Proceedings of the 2015 International Conference on Advanced Manufacturing and Industrial Application

View full text Add to dashboard Cite

Abstract-The posture of the bridge girder plays a very important role for the safety and efficiency of the bridge construction. This paper mainly proposed a mathematical method for determining the position and orientation of bridge girder and distributed Incremental Launching devices. Firstly, the background of incremental launching construction is introduced. In addition, the mechanical and hydraulic design of the launching device and its iterated construction movements are described. By analyzing the characteristics of incremental launching method and the distributed launching devices, the posture of single device and the bridge girder are determined mathematically. Further, the posture determination method is integrated into the bridge launching construction surveillance system. The application of this method is practically verified in the launching construction of Fengxi suspension bridge, finally.

show abstract

Improved Optimization Formulations for Launching Nose of Incrementally Launched Prestressed Concrete Bridges

Cited by 26 publications

References 8 publications

A new Technology for Incremental Launching the Small Curvature Radius Variable Cross-Section Steel Box Girder

A new Technology for Incremental Launching the Small Curvature Radius Variable Cross-Section Steel Box Girder

Simplified Analysis of Superstructure Section Considering Diaphragm and Optimum Design Conditions for ILM Bridge

Posture Determination for Bridge Girder and Distributed Incremental Launching Devices

Contact Info

Product

Resources

About