考虑几何非线性及施工的钢管混凝土拱桥徐变

doi:10.3969/j.issn.0258-2724.2013.04.009

基金项目:

国家自然科学基金资助项目(50778020)

计量
- 文章访问数:1549
- HTML全文浏览量:110
- PDF下载量:374
- 被引次数:0
出版历程
- 收稿日期:2013-05-23
- 刊出日期:2013-08-25

Creep of Concrete-Filled Steel Tube Arch Bridge Considering Geometric Nonlinearity and Construction

摘要

摘要:为研究大跨度钢管混凝土拱桥的徐变行为,基于混凝土徐变的B3模型,采用结构徐变效应分析的龄期调整有效模量法,建立了结构徐变的有限元分析模型.在此基础上,基于协同转动法考虑大跨度结构的几何非线性;利用生死单元技术模拟拱桥的分阶段施工过程;最后结合某大跨度中承式钢管混凝土拱桥,分析了考虑几何非线性和施工过程的徐变效应.数值分析表明:考虑这两个因素后拱肋挠度、钢管应力的变化在10%以内,而拱肋混凝土应力的变化可达50%;在分析大跨度钢管混凝土拱桥的徐变效应时,必须考虑几何非线性及施工过程与徐变的耦合作用.
- 徐变/
- 几何非线性/
- 施工/
- 钢管混凝土/
- 拱桥
Abstract:In order to investigate the creep behavior of long-span concrete filled steel tube (CFST) arch bridges, a finite element model for structural creep was developed using the age-adjusted effective modulus method based on the B3 model for concrete creep. In this framework, the corotational approach for geometric nonlinearity and the technique of element birth and death for simulating different construction stages were also introduced. A long-span half-through CFST arch bridge was analyzed as a numerical application to analyze the impact of geometric nonlinearity and construction process on creep. The calculated results demonstrate that considering the geometric nonlinearity and construction process makes the deflection and stress in steel tube change less than 10%, but leads to a change of 50% in the stress in concrete core. The coupling effect between creep and geometric nonlinearity/construction process is not negligible in the creep analysis of long-span CFST arch bridges.
- creep/
- geometric nonlinearity/
- construction/
- concrete-filled steel tube/
- arch bridges

HTML全文

参考文献 (17)

NAKAMURA S. New structural forms for steel/concrete composite bridges[J]. Structural Engineering Interna-tional, 2000, 10(1): 45-50.

钟善桐. 钢管混凝土结构[M]. 北京:清华大学出版社,2003: 1-5.

DING D J. Development of concrete-filled tubular arch bridges, China[J]. Structural Engineering Interna-tional, 2001, 11(4): 265-267.

陈宝春. 钢管混凝土拱桥设计与施工[M]. 北京:人民交通出版社,2007: 4-8.

SHAO Xudong, PENG Jianxin, LI Lifeng, et al. Time-dependent behavior of concrete-filled steel tubular arch bridge[J]. Journal of Bridge Engineering, 2010, 15(1): 98-107.

WANG Yuanfeng, HAN Bing, ZHANG Dianjie. Advances in creep of concrete filled steel tube members and structures[C]//Proceedings of 8th Concreep Conference. Ise-Shima: Taylor & Francis Group, 2008: 595-600.

马伊硕. 徐变对大跨度钢管混凝土拱桥静力及动力可靠性的影响研究[D]. 北京:北京交通大学,2013.

WANG Yuyin, GENG Yue, RANZI G, et al. Time-dependent behaviour of expansive concrete-filled steel tubular columns[J]. Journal of Constructional Steel Research, 2011, 67(3): 471-483.

PI Yonglin, BRADFORD M A, QU Weilian. Long-term non-linear behaviour and buckling of shallow concrete-filled steel tubular arches[J]. International Journal of Non-Linear Mechanics, 2011, 46(9): 1155-1166.

THAI H T, KIM S E. Nonlinear inelastic analysis of concrete-filled steel tubular frames[J]. Journal of Constructional Steel Research, 2011, 67(12): 1797-1805.

BAŽANT Z P, BAWEJA S. Creep and shrinkage prediction model for analysis and design of concrete structures: model B3[C]//Adam Neville Symposium: Creep and Shrinkage-Structural Design Effects.[S.l]: American Concrete Institute, 2000: 1-83.

BAŽANT Z P. Prediction of concrete creep effects using age-adjusted effective modulus method[J]. Journal of American Concrete Institute, 1972, 69(20): 212-217.

RANKIN C C, BROGAN F A. An element independent corotational procedure for the treatment of large rotations[J]. Journal of Pressure Vessel Technology, 1986, 108(2): 165-174.

NOUR-OMID B, RANKIN C C. Finite rotation analysis and consistent linearization using projectors[J]. Computer Methods in Applied Mechanics and Engineering, 1991, 93(3): 353-384.

FELIPPA C A, HAUGEN B. A unified formulation of small-strain corotational finite elements: Ⅰ. theory[J]. Computer Methods in Applied Mechanics and Engineering, 2005, 194(21-24): 2285-2335.

MALVERN L. Introduction to the mechanics of a montinuous medium[M]. New York: Prentice Hall, 1969: 497-569.

辛兵,徐升桥. 大跨度钢管混凝土拱桥的徐变分析[J]. 铁道标准设计,2003(4): 31-33. XIN Bing, XU Shengqiao. Analysis of creepage of long span steel tubular concrete arch bridge[J]. Railway Standard Design, 2003(4): 31-33.

施引文献

附加材料 (0)

访问统计

点击查看大图

计量

文章访问数:1549
HTML全文浏览量:110
PDF下载量:374
被引次数:0