Critical Load of Combined Pier for Continuous Rigid Frame Bridge

doi:10.3969/j.issn.1674-0696.2014.01.04

Journal of Chongqing Jiaotong University(Natural Science) ›› 2014, Vol. 33 ›› Issue (1): 17-20.DOI: 10.3969/j.issn.1674-0696.2014.01.04

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Critical Load of Combined Pier for Continuous Rigid Frame Bridge

Zhou Shuixing¹ , Man Zelian ^1,2 ,Zhou Guangqiang^1,3 , Li Yinbin⁴

1. School of Civil Engineering & Architecture , Chongqing Jiaotong University , Chongqing 400074 , China; 2. No. 3 Engieering Co. Ltd. , China Railway 20th Bureau Group , Chongqing 401121 , China; 3. 2nd Engineering Co. Ltd. , China Communications 2nd Navigational Bureau , Chongqing 400011 , China; 4. Guizhou Transportation Planning Survey & Design Academe Co. Ltd. , Guiyang 550001 , Guizhou , China

Received:2012-11-05 Revised:2013-03-15 Online:2014-02-15 Published:2015-01-22

连续刚构桥组合式桥墩临界荷载分析

周水兴¹，满泽联^1,2，周光强^1,3，李银斌⁴

1. 重庆交通大学土木建筑学院，重庆400074;2. 中铁二十局集团第二工程有限公司，重庆401121 ; 3. 中交二航局第二工程有限公司，重庆400011 ;4. 贵州省交通规划勘察设计研究院股份有限公司，贵州贵阳550001

作者简介:周水兴(1967-) 房，浙江嘉兴人，教授，博士，主要从事大跨度桥梁设计理论与施工控制技术研究。E-mail :zhoushuixing@126.com
基金资助:
贵州省交通运输厅科技项目(2010-122-017 )

Abstract

Abstract: According to Rayleigh-Ritz method in the theory of elastic stability , the formula for the out-of-plane instability criticalload during cantilever construction stage was derived for the combination of f1exible twin thin-wall piers and singlepier in continuous rigid frame bridge. A case study was presented to discuss the impacts of cutoff position in f1exible twin piers and single-pier on the critical load and buckling mode. The formula relating the elastic stability coe征icient for combined pier including its self-weight was then introduced. And the recommended value for the cutoff position between double thin-wall piers and single-pier was also provided.

Key words: continuous rigid frame bridge, combined pier, critical load, out-of-plane instability, cutoff position

摘要： 根据弹性稳定理论中的瑞利-里兹法，推导了连续刚构桥中由双薄壁墩与独墩组合而成的组合式桥墩在悬臂施工阶段面外失稳临界荷载计算公式。结合工程实例，探讨了双薄壁墩与独墩分界点位置对11备界荷载和失稳模态的影响。给出了组合式桥墩计入其自重作用的弹性稳定系数计算公式以及双薄壁墩与独墩分界点位置的建议值。

关键词: 连续刚构桥, 组合式桥墩, 临界荷载, 面外失稳, 分界点位置

CLC Number:

U441

Zhou Shuixingl , Man Zelian ,Zhou Guangqiang , Li Yinbin. Critical Load of Combined Pier for Continuous Rigid Frame Bridge[J]. Journal of Chongqing Jiaotong University(Natural Science), 2014, 33(1): 17-20.

周水兴，满泽联，周光强，李银斌. 连续刚构桥组合式桥墩临界荷载分析[J]. 重庆交通大学学报（自然科学版）, 2014, 33(1): 17-20.

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Critical Load of Combined Pier for Continuous Rigid Frame Bridge

连续刚构桥组合式桥墩临界荷载分析

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