全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

PC箱梁桥三维徐变效应精细化分析

, PP. 108-114

Keywords: 桥梁工程,PC箱梁桥,剪力滞徐变耦合,三维徐变模型,徐变系数曲线拟合

Full-Text   Cite this paper   Add to My Lib

Abstract:

?为实现大跨PC箱梁桥空间状态下的徐变分析,以初应变法的显式徐变理论为基础,利用有限元软件ADINA的材料二次开发平台建立混凝土徐变子程序,进而建立一种徐变度数值拟合的简化算法,以实现现有混凝土徐变预测模型与三维徐变分析的有机融合。以重庆江津长江大桥为例,通过实体模型与杆系模型的对比分析,研究箱梁剪力滞徐变耦合效应。结果表明:箱梁剪力滞效应对短期弹性变形影响较小(相差2.9%),但对长期徐变变形影响显著,较梁单元模型增大了24.5%。

References

[1]  谢 峻,王国亮,郑晓华.大跨径预应力混凝土箱梁桥长期下挠问题的研究现状[J].公路交通科技,2007,24(1):47-50.
[2]  XIE Jun,WANG Guo-liang,ZHENG Xiao-hua.State of Art of Long-term Deflection for Long Span Pre-stressed Concrete Box-girder Bridge[J].Journal of Highway and Transportation Research and Development,2007,24(1):47-50.
[3]  TAKCS P F.Deformations in Concrete Cantilever Bridges Observations and Theoretical Modeling[D].Trondheim:The Norwegian University of Science and Technology,2002.
[4]  ROBERTSON I N.Prediction of Vertical Deflections for a Long-span Prestressed Concrete Bridge Structure[J].Engineering Structures,2005,27(12):1820-1827.
[5]  BAANT Z P,LI G H,YU Q,et al.Explanation of Excessive Long-time Deflections of Collapsed Record-span Box Girder Bridge in Palau[R].Evanston:Northwestern University,2008.
[6]  彭 卫,陆光闾.混凝土箱梁的剪力滞效应对徐变的影响[J].桥梁建设,1998(1):28-30.
[7]  K?íSTEK V,BAANT Z P,ZICH M,et al.Box Girder Bridge Deflections[J].ACI Concrete International,2006,28(1):55-63.
[8]  ZHU Bo-fang.An Implicit Method for the Stress Analysis of Concrete Structures Considering the Effect of Creep[J].Journal of Hydraulic Engineering,1983,14(5):40-46.
[9]  PENG Wei,LU Guang-lu.Shear Lag Effect in Concrete Box Girder Creep[J].Bridge Construction,1998(1):28-30.
[10]  AHN I S,CHEWANICHAKORN M,CHEN S S,et al.Effective Flange Width Provisions for Composite Steel Bridges[J].Engineering Structures,2004,26(12):1843-1851.
[11]  K?íSTEK V,BAANT Z P.Shear Lag Effect and Uncertainty in Concrete Box Girder Creep[J].Journal of Structural Engineering,1987,113(3):557-574.
[12]  CHENG Xiao-dong,LI Guang-yu,YE Gui-ru.Three-dimensional Nonlinear Analysis of Creep in Concrete Filled Steel Tube Columns[J].Journal of Zhejiang University: Science A,2005,6(8):826-835.
[13]  DEZI L,GARA F,LEONI G,et al.Time-dependent Analysis of Shear-lag Effect in Composite Beams[J].Engineering Mechanics,2001,127(1):71-79.
[14]  朱伯芳.混凝土结构徐变应力分析的隐式解法[J].水利学报,1983,14(5):40-46.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133