摘要To study the effect of shear lag on a composite girder with steel truss webs, a three-dimensional finite element (FE) model, using the ANSYS FE software, and a corresponding FE model of composite girder with corrugated steel webs is established to perform a comparative analysis. The shear lag effect and distribution of shear lag coefficients along the cross section of the composite girder with steel truss webs are investigated under concentrated and uniform loads. The results show that (1) under concentrated and uniform loads, the shear lag effect is evident on the top and bottom plates of the composite girder with steel truss webs; (2) for the composite girder with steel truss webs, the shear lag effect is more pronounced under concentrated loads than under uniform loads; (3) under the same load, the normal stresses of the top and bottom plates of the composite girder with steel truss webs are less than those of composite girder with corrugated steel webs; and (4) the shear lag coefficient distributions of the top and bottom plates along the cross section are almost similar for the two types of composite girders.
Abstract：To study the effect of shear lag on a composite girder with steel truss webs, a three-dimensional finite element (FE) model, using the ANSYS FE software, and a corresponding FE model of composite girder with corrugated steel webs is established to perform a comparative analysis. The shear lag effect and distribution of shear lag coefficients along the cross section of the composite girder with steel truss webs are investigated under concentrated and uniform loads. The results show that (1) under concentrated and uniform loads, the shear lag effect is evident on the top and bottom plates of the composite girder with steel truss webs; (2) for the composite girder with steel truss webs, the shear lag effect is more pronounced under concentrated loads than under uniform loads; (3) under the same load, the normal stresses of the top and bottom plates of the composite girder with steel truss webs are less than those of composite girder with corrugated steel webs; and (4) the shear lag coefficient distributions of the top and bottom plates along the cross section are almost similar for the two types of composite girders.
郑尚敏, 万水. 钢桁腹组合梁剪刀滞效应的有限元分析[J]. Journal of Highway and Transportation Research and Development, 2014, 8(3): 70-75.
ZHENG Shang-min, WAN Shui. Finite Element Analysis of Shear Lag Effect on Composite Girder with Steel Truss Webs. Journal of Highway and Transportation Research and Development, 2014, 8(3): 70-75.
[1] LIU Yu-Qing. Steel-Concrete Hybrid Bridge[M]. Beijing:China Communications Press, 2005. (in Chinese)
[2] XU Qian, WAN Shui. Design and Application of Prestressed Concrete Composite Girder Bridge with Corrugated Steel Webs[M]. Beijing:China Communication Press, 2009. (in Chinese)
[3] CHEN Kai-Li. Introduction of Boulonnais Viaduct in France[J]. Foreign Bridge, 1999(1):15-17. (in Chinese)
[4] JUNG K H, YI J W, KIM J H J. Structural Safety and Serviceability Evaluations of Prestressed Concrete Hybrid Bridge Girders with Corrugated or Steel Truss Web Members[J]. Engineering Structures, 2010, 32(12):3866-3878.
[5] MACHACEK J, CUDEJKO M. Longitudinal Shear in Composite Steel and Concrete Trusses[J]. Engineering Structures, 2009, 31(6):1313-1320.
[6] HUANG Hua-qi, LIU Zhao, ZHANG Jian-dong. Spatial Grillage Model for Steel Truss Web and Concrete Composite Box-girder Bridge[J]. Structural Engineers, 2011, 27(4):73-77. (in Chinese)
[7] LI Li-feng, PENG Kun, WANG Wen. Theoretical and Experimental Study on Shear Lag Effect of Composite Box Girder with Corrugated Steel Webs[J]. Journal of Highway and Transportation Research and Development, 2009, 26(4):78-83. (in Chinese)
[8] LI Li-feng, LIU Zhi-cai, WANG Fang. Research on Flexure Theory at Elastic Stage and Model Test of Composite Box Girder with Corrugated Steel Webs[J]. Journal of Highway and Transportation Research and Development, 2008, 25(1):69-73. (in Chinese)
[9] WU Wen-qing, YE Jian-shu, WAN Shui, et al. Experiment Study of Shear Lag Effect of Composite Box Girder with Corrugated Steel Web Under the Symmetrical Load[J]. China Journal of Highway and Transport, 2003, 16(2):48-51. (in Chinese)
[10] WU Wen-qing, WAN Shui, YE Jian-shu, et al. 3-D Finite Element Analysis on Shear Lag Effect in Composite Box Girder with Corrugated Steel Web[J].China Civil Engineering Journal, 2004, 37(9):31-36. (in Chinese)
[11] LI Shu-qin, WAN Shui, ZHANG Chang-qing. Design and Manufacture of Corrugated Steel Webs[M]. Beijing:China Communications Press, 2011. (in Chinese)
[12] WU Wen-qing. Research on Shear Lag Effect in Composite Box Girder with Corrugated Steel Webs[D]. Nanjing:Southeast University, 2002. (in Chinese)
[13] ZHANG Shi-duo. Shear Lag Effect of Box Girder with Thin Wall[M]. Beijing:China Communications Press, 1998. (in Chinese)
[14] GUO Jin-qiong, FANG Zhen-zheng, LUO Xiao-deng. Analysis of Shear Lag Effect in Box Girder[J]. China Civil Engineering Journal, 1983,16(1):1-13. (in Chinese)
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2014, Vol. 8 
