中小跨桥梁横向抗震挡块的合理设置方式
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摘要
我国的中小跨径桥梁普遍采用板式橡胶支座并在横向设置抗震挡块,但现行的桥梁抗震设计规范对挡块的设置方式并没有明确的规定。为了探寻一种对桥梁下部结构抗震有利的挡块设置方式,该文采用非线性时程分析方法,考虑横向抗震挡块与上部结构的碰撞效应,研究两跨30m连续梁中横向抗震挡块对桥梁结构地震反应的影响,分析挡块和上部结构之间初始间隙对结构地震反应的影响规律。最终,从保护桥梁下部结构并能防止落梁的角度出发,提出一条抗震设计思路,为横向抗震挡块的合理设置提出建议。
The plate elastomeric pad bearing is commonly used for the small-span and middle-span bridges and the seismic block is laterally set up in China, but there is no specific stipulation for the setup method of seismic block in the current bridge seismic design standard. In order to find a setup method of seismic blockadvantageous for seismic resistance of bridge substructure, the article studies the influence of lateral seismic block in two-span 30-m continuous beam on the earthquake reaction of bridge structure, analyzes the influence law of the primary gap between seismic block and superstructure on earthquake reaction of structure by using non-linear time history analysis method and considering the collision effect of lateral seismic block and the superstructure, and finally puts forward a seismic design idea and a proposal for the reasonable setup of lateral seismic block from the angle of protecting the bridge substructure and able to prevent beam falling.
The plate elastomeric pad bearing is commonly used for the small-span and middle-span bridges and the seismic block is laterally set up in China, but there is no specific stipulation for the setup method of seismic block in the current bridge seismic design standard. In order to find a setup method of seismic blockadvantageous for seismic resistance of bridge substructure, the article studies the influence of lateral seismic block in two-span 30-m continuous beam on the earthquake reaction of bridge structure, analyzes the influence law of the primary gap between seismic block and superstructure on earthquake reaction of structure by using non-linear time history analysis method and considering the collision effect of lateral seismic block and the superstructure, and finally puts forward a seismic design idea and a proposal for the reasonable setup of lateral seismic block from the angle of protecting the bridge substructure and able to prevent beam falling.
引文
[1]JTG/TB02-01-2008,公路桥梁抗震设计细则[S].
[2]CJJ166-2011,城市桥梁抗震设计规范[S].
[3]庄鑫,李建中,王瑞龙.横向抗震挡块对桥梁抗震性能的影响分析[J].石家庄铁道大学学报(自然科学版),2014,27(1):14-18.
[4]石岩,王军文,秦洪果,侯万宁.桥梁抗震挡块研究进展[J].世界地震工程,2013,29(2):90-94.
[5]刘鹏,地震作用下桥梁梁体与横向挡块动态碰撞研究[D].成都:西南交通大学,2007.
[6]李永红,城市高架桥限位装置抗震设计研究[D].兰州:兰州交通大学,2012.
[7]邓育林,彭天波,李建中.地震作用下桥梁结构横向碰撞模型及参数分析[J].振动与冲击,2007,26(9):104-107.
[8]黄小国.挡块间隙对桥墩横桥向抗震性能的影响[J].地下工程与隧道,2011,(4):12-15.
[9]JT/T663-2006,公路桥梁板式橡胶支座规格系列[S].
[10]郭磊,强震作用下桥梁的碰撞效应及对应措施[D].长沙:湖南大学,2010.
[11]吕龙.桥梁地震碰撞模拟分析及防撞防落梁措施研究[D].成都:西南交通大学,2009.
[2]CJJ166-2011,城市桥梁抗震设计规范[S].
[3]庄鑫,李建中,王瑞龙.横向抗震挡块对桥梁抗震性能的影响分析[J].石家庄铁道大学学报(自然科学版),2014,27(1):14-18.
[4]石岩,王军文,秦洪果,侯万宁.桥梁抗震挡块研究进展[J].世界地震工程,2013,29(2):90-94.
[5]刘鹏,地震作用下桥梁梁体与横向挡块动态碰撞研究[D].成都:西南交通大学,2007.
[6]李永红,城市高架桥限位装置抗震设计研究[D].兰州:兰州交通大学,2012.
[7]邓育林,彭天波,李建中.地震作用下桥梁结构横向碰撞模型及参数分析[J].振动与冲击,2007,26(9):104-107.
[8]黄小国.挡块间隙对桥墩横桥向抗震性能的影响[J].地下工程与隧道,2011,(4):12-15.
[9]JT/T663-2006,公路桥梁板式橡胶支座规格系列[S].
[10]郭磊,强震作用下桥梁的碰撞效应及对应措施[D].长沙:湖南大学,2010.
[11]吕龙.桥梁地震碰撞模拟分析及防撞防落梁措施研究[D].成都:西南交通大学,2009.
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