Pre-Camber Study on the Steel-Concrete Composite Beam Constructed by the Incremental Launching Method

Abstract:

This paper summarized and evaluated the girder construction methods of self-anchored suspension bridge, pointed out that the main beam linear would have a local depression between the largest span temporary pier when the steel-concrete composite beams were constructed by the incremental launching construction method, even if the main beam were withstand uniform bar-forces, moreover, the pre-camber curve of the main-girder could not arranged as a circle curve or quadratic parabola within the entire span. In view of this, the entire construction process of a self-anchored suspension bridge was analyzed by the finite element method, The results showed that the section property changes of the steel-concrete composite beam were the nature reason of the local depression on the main beam linear; The completed main beam was simplified into a three-span continuous beam which suffered vertical uniform distributing load and horizontal forces at the two ends, and the simplified formulas of calculating the vertical displacement of each span were derived by the force method; The numerical example showed that, the proposed simplified formulas could effectively solve the affection by the section property changes, accurately predicted the main beam cumulative vertical displacement, and the calculation accuracy could meet the engineering requirements, the conclusions of this paper had a strong guiding significance and reference value on the camber design and construction of the bridge wth the similar structural type.

• Periodical: Key Engineering Materials (Volume 619)
• Pages: 43-50
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.619.43
• Online since: July 2014
• Authors: Yong Ming Sun*, Wei Zhang, Dian Bo Wang
• Keywords: Bridge Engineering, Incremental Launching Construction, Pre-Camber, Steel-Concrete Composite Beam

References

[1] Nie Jianguo, Yu Zhiwu. Research and practice of composite steel-concrete beams in China[J]. China Civil Engineering Journal, 1999, 32(2): 3-8.

[2] Zhang Zhe, Dou Peng, Shi Lei, Liu Chuncheng. Development Summary of the long-span Self-archor Suspension Bridge[J]. Word Bridge, 2003(1): 5-9.

[3] Xia Wenmin, Liu Xuemei. Research and Prospect of the Steel-concrete Composite Beam[J]. Sichuan Architecture, 2010, 30(2):121-124.

[4] .Han Zhenyong. Construction Technology Study on the long-span Self-archor Suspension Bridge[J]. Scientific and Technology Research, 2006,7(4): 178-183.

[5] Wang Tingting, Qi Wei. Study on Construction Measures of Temporary Scaffold in the Water for Erecting Steel-concrete Composite Beam [J]. Bridge Engineering, 2011, 29(3): 48-50.

[6] Duan Mingde. The Absulate Defelection Method of Setting Camber [J]. Journal of Railway Engineering Society

[7] Wang Hongzhi, Wang Tian, Yang Yong. Construction Camber Research on the Steel-concrete Composite Truss Bridge [J]. Gansu Science and Technology, 2013, 29(8): 104-106.

[8] Pan Xiao. The Method Application of Setting the Construction Pre-camber of the Situ Beam on the Frame [J]. Bridge Engineering, 2011, 29(1): 63-66.

[9] Study on Pre-camber Setting and Simplified Salculation of Concrete Simple Beam[J]. Shanxi Architecture, 2004, 30(4):24-25.

[10] Sun Yongming. Construction Process Analysis and Construction Control Techniques Research of Concrete Cable-Stayed Bridge Based on Composite Element[D]. Haerbin Institute of Thechnology, 2009, 9.