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-  2015 

冲刷作用下桥墩结构体系的屈曲荷载计算 Bent buckling evaluation of bridge pier system under scour effect

Keywords: 桥墩,冲刷,屈曲,安全评价

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Abstract:

为分析冲刷对桥墩结构体系承载力的影响,在土-桩-桥墩结构相互作用的基础上提出桥墩-群桩的等效结构体系,考虑了滑动橡胶支座和承台作用,推导桥墩结构体系的屈曲荷载计算公式.以苏通大桥的辅助桥墩为例,分析了冲刷深度、桩墩刚度比、桥墩高度、承台重量和滑动橡胶支座对屈曲荷载的影响.结果表明,当冲刷深度从0m增加到90m时,屈曲荷载降低了69.3%.桩墩刚度比、桥墩长度和橡胶支座等对群桩-桥墩结构体系的稳定有较重要的影响,承台重量对结构体系的静力稳定影响较小.在实际工程中,可优化桥墩和群桩的刚度比、长度比,使得结构体系拥有合理的刚度分布,从而在冲刷作用下可在一定程度上减缓桥墩-群桩结构体系的屈曲性能的降低.在桥墩结构体系的屈曲荷载计算中,应考虑滑动橡胶支座刚度的影响

References

[1]  江胜华,周智,欧进萍.基于赫兹接触理论的桥墩局部冲刷防护石块起动简化公式[J].中国公路学报,2014,27(5):118-124.
[2]  Bozkus Z,Yildiz O.Effects of inclination of bridge piers on scouring depth[J].Journal of Hydraulic Engineering,2004,130(8):827-832.
[3]  Yu Xinbao,Yu Xiong.Assessment of an automation algorithm for TDR Bridge scour monitoring system[J].Advances in Structural Engineering,2011,14(1):13-24.
[4]  Johnson P J,Dock D D.Probabilistic bridge scour estimates[J].Journal of Hydraulic Engineering,1998,124(7):750-754.
[5]  Briaud J L,Gardoni P,Yao C P.Statistical,risk,and reliability analyses of bridge scour[J].Journal of Geotechnical and Geoenvironmental Engineering,2014,140(2):04013011-1-04013011-10.
[6]  Hughes D,Ramey G E,Hughes M L.Bridge pile bent number of piles and X-bracing system:Impact on pushover capacity as scour increases[J].Practice Periodical on Structural Design and Construction,2007,12(2):82-95.
[7]  Ko Y Y,Chiou J S,Tsai Y C,et al.Evaluation of flood-resistant capacity of scoured bridges[J].Journal of Performance of Constructed Facilities,2014,28(1):61-75.
[8]  赵明华,王杜鹃,杨明辉.高墩-群桩体系临界荷载计算[J].湖南大学学报(自然科学版),2011,38(8):1-6.
[9]  周敉,袁万城,张玥.高桩承台基础群桩等效嵌固长度参数分析[J].长安大学学报(自然科学版),2010,30(3):47-52.
[10]  曹圣华.苏通大桥巨型群桩基础冲刷防护研究[D].南京:河海大学,2006.
[11]  叶爱君,吴寿昌,胡世傀,等.苏通大桥主航道桥扰震性能研究[C]//第二届全国公路科技创新高层论坛论文集,2004:106-111.
[12]  Melville B W.Local scour at bridge abutments[J].Journal of Hydraulic Engineering,1992,118(4):615-631.
[13]  Johnson P J.Reliability-based scour engineering[J].Journal of Hydraulic Engineering,1992,118(10):1344-1358.
[14]  Hughes D,Ramey G E,Hughes M L.Effects of extreme scour and soil subgrade modulus on bridge pile bent buckling[J].Practice Periodical on Structural Design and Construction,2007,12(2):96-108.
[15]  Chen C C,Wu W H,Shih F,et al.Scour evaluation for foundation of a cable-stayed bridge based on ambient vibration measurements of superstructure[J].NDT&E International,2014,66:16-27.
[16]  叶爱君,刘伟岸,王斌斌.高桩承台基础与桥梁结构的动力相互作用[J].同济大学学报(自然科学版),2007,35(9):1163-1168.
[17]  王蒂,黄平明.超大跨度斜拉桥纵向减震耗能塔、梁连接装置研究[J].郑州大学学报(工学版),2008,29(4):112-115,144.

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