[1]刘杰,叶见曙,陈娟娟,等.基于组合式模型的箱梁横向预应力张拉顺序分析[J].东南大学学报(自然科学版),2012,42(2):363-368.[doi:10.3969/j.issn.1001-0505.2012.02.032]
 Liu Jie,Ye Jianshu,Chen Juanjuan,et al.Analysis on tensioning sequence of transverse prestressing in box girder based on combined element model[J].Journal of Southeast University (Natural Science Edition),2012,42(2):363-368.[doi:10.3969/j.issn.1001-0505.2012.02.032]
点击复制

基于组合式模型的箱梁横向预应力张拉顺序分析()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第2期
页码:
363-368
栏目:
交通运输工程
出版日期:
2012-03-20

文章信息/Info

Title:
Analysis on tensioning sequence of transverse prestressing in box girder based on combined element model
作者:
刘杰1 叶见曙1 陈娟娟2 李宏江3
1 东南大学交通学院,南京 210096; 2 东南大学成贤学院,南京 210088; 3 交通运输部公路科学研究院,北京 100088
Author(s):
Liu Jie1 Ye Jianshu1 Chen Juanjuan2 Li Hongjiang3
1 School of Transportation,Southeast University,Nanjing 210096,China
2 Chengxian College,Southeast University,Nanjing 210088,China
3 Research Institute of Highway,Ministry of Transport,Beijing 100088,China
关键词:
混凝土箱梁 横向预应力 张拉顺序 有限元法 滞后张拉
Keywords:
concrete box girder transverse prestressing tensioning sequence finite element method delay-tensioning
分类号:
U448.21
DOI:
10.3969/j.issn.1001-0505.2012.02.032
摘要:
为了研究混凝土箱梁横向预应力合理的张拉顺序,利用体梁组合单元建立了南京长江第二大桥北汊桥悬臂施工的空间有限元模型,分析了采用不同张拉顺序施加横向预应力对箱梁顶板横向正应力分布的影响.分析结果表明:分段立即张拉会造成顶板中部下缘横向压应力沿纵向近似线性增加,从与前一梁段交界处的2.9MPa增加到与后一梁段交界处的10.1MPa; 采用滞后张拉时,顶板中部下缘产生约6.7MPa的均匀压应力,表明滞后张拉能更合理地发挥横向预应力的效应.据此提出了基于滞后张拉的施工方法,以克服横向压应力沿纵向分布不均的缺点,并进一步指出了滞后张拉在设计和施工中的注意事项,为改进现有大跨预应力混凝土箱梁的设计理论提供参考.
Abstract:
In order to study the reasonable tensioning sequence of transverse prestressing in concrete box girders,a spatial finite element model simulating the cantilever construction process of the North Bridge of Nanjing Second Yangtze River Bridge is established based on the brick-beam combination element. The influence of the tensioning sequence of transverse prestressing on the transverse normal stress distribution in the top plate of the box girder is analyzed. The analysis results show that when the transverse prestressing is tensioned immediately, the transverse compressive stress at the lower center of the top plate approximately linearly increases along the longitudinal coordinate, from 2.9MPa at the point connecting the previous segment to 10.1MPa at the point connecting the following segment. When the transverse prestressing is delay-tensioned, the uniform transverse compressive stress of about 6.7MPa is produced at the lower center of the top plate, demonstrating that delay-tensioning can more effectively play the role of transverse prestressing. According to the results, the construction method based on the delay-tensioning is proposed to solve the problem of non-uniform distribution of the transverse compressive stresses along the longitudinal coordinate. Furthermore, the notes of the delay-tensioning in design and construction are given, which can be used as a reference for improving the design theory of the existing large span prestressed concrete box girder.

参考文献/References:

[1] 黄鹤莅.顶板横向预应力钢束对箱梁横向计算结果的影响[J].铁道工程学报,2007(10):50-52.
  Huang Heli.Effect of lateral prestressing tendon in top deck on lateral calculation result of box beam[J].Journal of Railway Engineering Society,2007(10):50-52.(in Chinese)
[2] 王国亮,谢峻,傅宇方.在用大跨度预应力混凝土箱梁桥裂缝调查研究[J].公路交通科技,2008,25(8):52-56.
  Wang Guoliang,Xie Jun,Fu Yufang.Investigation research on crack of long-span prestressed concrete box girder bridges in service[J].Journal of Highway and Transportation Research and Development,2008,25(8):52-56.(in Chinese)
[3] 郑振.连续刚构弯箱梁桥横向内力计算方法[J].中国公路学报,2000,13(4):57-61.
  Zheng Zhen.Calculation method of the continuous rigid frame curved box girder[J].China Journal of Highway and Transport,2000,13(4):57-61.(in Chinese)
[4] 颉明军,惠卓,秦玉军,等.刚构桥悬臂施工时预应力筋张拉顺序分析[J].铁道建筑,2007(10):19-21.
  Jie Mingjun,Xi Zhuo,Qing Yujun,et al.Analysis on tension sequence of prestressed tendon of rigid-frame bridge in cantilever construction period[J].Railway Engineering,2007(10):19-21.(in Chinese)
[5] 江见鲸,陆新征,叶列平.混凝土结构有限元分析 [M].北京:清华大学出版社,2004.
[6] Kitjapat Phuvoravan.Nonlinear finite element for reinforced concrete slabs [J].Journal of Structural Engineering,2005,131(4):643-649.
[7] 王家林.钢筋混凝土结构空间有限元分析的体梁组合单元[J].工程力学,2002,19(6):131-135.
  Wang Jialin.A brick-beam combination element for three-dimensional finite element analysis of reinforced concrete structures[J].Engineering Mechanics,2002,19(6):131-135.(in Chinese)
[8] Robert B P,Mark J M,Rudolf S.In-plane shear behavior of masonry panels strengthened with NSM CFRP strips[J].Journal of Composites for Construction,2010,14(6):764-774.
[9] Guo Tong,Sause Richard,Frangopol Dan M,et al.Time-dependent reliability of PSC box-girder bridge considering creep,shrinkage,and corrosion [J].Journal of Bridge Engineering,2011,16(1):29-43.
[10] Weng J H,Loh C H,Yang J N.Experimental study of damage detection by data-driven subspace identification and finite-element model updating [J].Journal of Structural Engineering,2009,135(12):1533-1544.
[11] 叶见曙,贾琳,钱培舒.混凝土箱梁温度分布观测与研究[J].东南大学学报:自然科学版,2002,32(5):788-793.
  Ye Jianshu,Jia Lin,Qian Peishu.Observation and research on temperature distribution in concrete box girders[J].Journal of Southeast University:Natural Science Edition,2002,32(5):788-793.(in Chinese)

相似文献/References:

[1]王斐峰,叶见曙,邓学钧.滨州黄河大桥主梁边箱模型试验[J].东南大学学报(自然科学版),2005,35(6):920.[doi:10.3969/j.issn.1001-0505.2005.06.020]
 Wang Feifeng,Ye Jianshu,Deng Xuejun.Experimental on side boxes model of Binzhou Yellow River Bridge[J].Journal of Southeast University (Natural Science Edition),2005,35(2):920.[doi:10.3969/j.issn.1001-0505.2005.06.020]
[2]潘钻峰,等.装配式板桥的横向预应力设计[J].东南大学学报(自然科学版),2010,40(6):1264.[doi:10.3969/j.issn.1001-0505.2010.06.026]
 Pan Zuanfeng,Chung C. Fu,Lü Zhitao.Study on transverse post-tensioning in assembly slab bridges[J].Journal of Southeast University (Natural Science Edition),2010,40(2):1264.[doi:10.3969/j.issn.1001-0505.2010.06.026]

备注/Memo

备注/Memo:
作者简介: 刘杰(1984—),男,博士生; 叶见曙(联系人),男,教授,博士生导师,yejianshu@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(50808095).
引文格式: 刘杰,叶见曙,陈娟娟,等.基于组合式模型的箱梁横向预应力张拉顺序分析[J].东南大学学报:自然科学版,2012,42(2):363-368. [doi:10.3969/j.issn.1001-0505.2012.02.032]
更新日期/Last Update: 2012-03-20