Shear Lag Effect of Continuous Curved Box Girder with Initial Curvature

Abstract:

The homogeneous solutions of the governing differential equations for shear lag are used as the displacement patterns of the finite segment are presented. A finite segment model with consideration of initial curvature, bending, torsion and shear lag is established. In addition, the tests of the two-span continuous curved box girder and numerical calculations of the model tests by finite segment method and finite element method are made. The results of the model tests and numerical calculation are consistent with each other. An actual example was given to investigate the shear lag effect of a continuous curved box girder under load. The research results show that the initial curvature has an obvious influence on the shear lag effect of a continuous curved box girder.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 1701-1704
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.1701
• Online since: June 2012
• Authors: You Ming Wu, Yong Jun Lu, Han Shi
• Keywords: Continuous Curved Box Girder, Finite Segment Method, Initial Curvature, Model Test, Shear Lag Effect

References

[1] A G Razaqpur,H G Li.Refined analysis of curved thin-walled multicell box girders[J]. Computers & Structures, 1994, 53(1):131-142

DOI: 10.1016/0045-7949(94)90136-8

[2] Q Z Luo,Q S Li.Shear lag of thin-walled curved box girder bridges[J].Journal of Engineering Mechanics,ASCE,2000，126(10)：1111-1114

DOI: 10.1061/(asce)0733-9399(2000)126:10(1111)

[3] Zhaotong Hu, Yunxin Liu, Jianming Cai. A study on shearLag effect for continuously curved RC box girders[J]. Highway，2005，(12)：19-21

[4] Yunbiao Yang. Mechanical analysis of curved box beam including the effect of curvatube and shear-lag[J]. Journal of Civil Engineering, 1999,32(1)：43-49.

[5] Jianguo Nie, Faxiong Li, Jiansheng Fan, Qi Cai. Practical design method for steel-concrete composite beam considering shear lag effect[J]. Engineering Mechanics，2011，28(11)：45-51