墩身高阶振型对高墩地震反应影响
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同济大学 桥梁工程系,同济大学 桥梁工程系,同济大学 桥梁工程系

中图分类号:

U441+.3

基金项目:

国家973项目(2013CB036302)


Seismic Performance of Tall Piers Influenced by Highermode Effects of Piers
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    摘要:

    采用增量动力分析的方法,全面讨论了墩身高阶振型对桥梁结构地震反应的影响.首先分析了现有规范中的桥梁抗震设计方法应用于高墩的局限性;随后采用了增量动力分析方法,在考虑墩身高阶振型效应的情况下,对高墩桥梁结构在地震作用下的性能进行了研究.结果表明:由于墩身高阶振型贡献,高墩在强震作用下可能沿墩身产生多个塑性区域;墩顶位移与墩底曲率不再同步变化,高墩墩顶极限位移不能采用规范中的方法进行计算;高墩墩身的地震剪力及弯矩需求也会由于墩身高阶振型的显著影响而变得十分复杂.最后提出了针对高墩抗震设计的一些改进措施.

    Abstract:

    In this paper, incremental dynamic analysis was used to investigate the effects of higher modes on seismic reposes of tall piers. Firstly the limitation of current design method focusing on conventional bridges was presented. Then the seismic performance of tall piers was investigated by incremental dynamic analysis method. The results show that with the contributions of higher modes of massive piers, multiple plastic zones are formed along the pier height under strong earthquake. The ultimate displacement at the pier top cannot be estimated by methods in current design codes, and the displacement varies outofphase with the curvature at the pier bottom. Further, the distribution patterns of shear force and bending moment along pier height are more complex than the linear and triangular distributions of conventional piers. Finally, some improvements for seismic design of tall piers are proposed.

    参考文献
    [1] 2011 C J J. 城市桥梁抗震设计规范 [S][D].CJJ 166-2011. Code for seismic design of urban bridges. Beijing: China Architecture Building Press, 2011 (in Chinese)
    [2] 01-2008 J T G T B. 公路桥梁抗震设计细则 [S][D]. , 2008.JTG/T B02-01-2008. Guidelines for Seismic Design of Highway Bridges. Beijing: China Communications Press, 2008 (in Chinese)
    [3] AASHTO. AASHTO Guide Specification for LRFD Seismic Bridge Design, 2007
    [4]Priestley, M. J. N., Seible, F. and Calvi, G. M. Seismic Design and Retrofit of Bridges. New York: John Wiley Sons, 1996
    [5]M.J.Kowalsky. Deformation limit states for circular reinforced concrete bridge column[J].Journal of Structural Engineering ASCE,2000,126(8):869-878.
    [6] 梁智垚. 桥梁高墩位移延性能力计算方法研究[J]. 工程抗震与加固改造, 2006, 27(5): 57-62.Liang, Z. Y. Study on Calculational Methods of Displacement Ductility Capacity of Tall Pier[J]. Earthquake Resistant Engineering and Retrofitting, 2006, 27(5): 57-62.
    [7] Tubaldi E, Tassotti L, Dall'Asta A, et al. Seismic response analysis of slender bridge piers[J]. Earthquake Engineering Structural Dynamics, 2014, 43(10): 1503-1519.
    [8] Takahashi Y, Iemura H. Inelastic seismic performance of RC tall piers with hollow section[C]//12th World Conference of Earthquake Engineering. Oakland. 2000, 1353.
    [9] Chopra A K, Goel R K. A modal pushover analysis procedure for estimating seismic demands for buildings[J]. Earthquake Engineering Structural Dynamics, 2002, 31(3): 561-582.
    [10] Scott B D, Park R, Priestley M J N. Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates[C]//ACI Journal Proceedings. ACI, 1982, 79(1).
    [11] Vamvatsikos D, Cornell C A. Incremental dynamic analysis[J]. Earthquake Engineering Structural Dynamics, 2002, 31(3): 491-514.
    [12] Vamvatsikos D, Cornell C A. Direct Estimation of Seismic Demand and Capacity of Multidegree-of-Freedom Systems through Incremental Dynamic Analysis of Single Degree of Freedom Approximation 1[J]. Journal of Structural Engineering, 2005, 131(4): 589-599.
    [13] PEER NGA Data Base. Pacific Earthquake Engineering (PEER), University of California, Berkeley, 2005. Available from: http://peer.berkeley.edu/nga/
    [14] Berry M P, Lehman D E, Lowes L N. Lumped-plasticity models for performance simulation of bridge columns[J]. ACI Structure Journal, 2008, 105(3)
    [15] 叶爱君.桥梁抗震[M].北京:人民交通出版社,2008:1—143.YE Ai-jun. Seismic Design of Bridges[M]. Beijing: China Communications Press, 2008.
    [16] Wilson J L. Earthquake response of tall reinforced concrete chimneys[J]. Engineering Structures, 2003, 25(1): 11-24.
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引用本文

陈旭,李建中,刘笑显.墩身高阶振型对高墩地震反应影响[J].同济大学学报(自然科学版),2017,45(02):0159~0166

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  • 收稿日期:2016-05-19
  • 最后修改日期:2016-11-22
  • 录用日期:2016-09-26
  • 在线发布日期: 2017-03-07
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