新型抗震挡的减震作用
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摘要
针对当前抗震挡多为刚性,在地震作用下,易与上部结构发生碰撞而产生脆性破坏这一情况,提出一种具有耗能减震作用的柔性抗震挡,并建立了碰撞模型,探讨了碰撞力与碰撞刚度和阻尼比之间的关系.同时,选取一座双层三跨连续梁桥进行有限元计算研究.结果表明:随着碰撞刚度的不断增大,碰撞力也随之增大,墩梁相对位移相应减小,但通过设置合理的碰撞刚度、初始间隙等参数,新型抗震挡就可以取得良好的减隔震效果.
In view of the situation that,the seismic block is usually rigid,so brittle damage usually occurs under the action of the earthquake,a kind of flexible aseismic block which has the effect of energy dissipation and seismic mitigation was put forward,and established the collision model was established,the relationship of impact with collision stiffness and damping ratio was discussed.At the same time,a model of double three span continuous beam with gate pier was established.It turned out that with the increasing of collision rigidity,impact increased and the relative displacement of the pier and the beam decreased,but by setting reasonable parameters such as colliding stiffness initial clearance,it would get favourable effect of vibration isolation.
In view of the situation that,the seismic block is usually rigid,so brittle damage usually occurs under the action of the earthquake,a kind of flexible aseismic block which has the effect of energy dissipation and seismic mitigation was put forward,and established the collision model was established,the relationship of impact with collision stiffness and damping ratio was discussed.At the same time,a model of double three span continuous beam with gate pier was established.It turned out that with the increasing of collision rigidity,impact increased and the relative displacement of the pier and the beam decreased,but by setting reasonable parameters such as colliding stiffness initial clearance,it would get favourable effect of vibration isolation.
引文
[1]孟杰,刘钊.汶川地震中的桥梁落梁震害分析及启示[J].结构工程师,2010,26(2):95-100.(Meng Jie,Liu Zhao.Causation Analysis and Enlightenment on Bridge Unseating in the Great Wenchuan Earthquake[J].Structural Engineers,2010,26(2):95-100.)
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[5]朱文正,徐忠根.隔震桥梁横桥向挡块设计研究[J].土木工程与管理学报,2011,28(3):407-411.(Zhu Wenzheng,Xu Zhonggen.Design Method for Seismic Blocks of an Isolation Bridge[J].Journal of Civil Engineering and Management,2011,28(3):407-411.)
[6]江辉,李宇,杨庆山,等.浅源强震下RC梁式桥横向碰撞参数研究[J].振动与冲击,2012,31(4):53-59.(Jiang Hui,Li Yu,YANG Qingshan,et al.Parameter Study on Transverse Pounding of RC Girder Bridge under typical Strong Earthquake from Shallow Source[J].Journal of Vibration and Shock,2012,31(4):53-59.)
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[8]王军文,李建中,范立础.非规则梁桥横桥向地震碰撞反应分析[J].振动与冲击,2010,29(6):25-30,233.(Wang Junwen,Li Jianzhong,Fan Lichu.Analysis on Pounding Effect of Irregular Girder Bridges under Transverse Earthquake[J].Journal of Vibration and Shock,2010,29(6):25-30,233.)
[9]李浩然,朱涵,朱学超.横梁含橡胶集料对某框架剪力墙结构抗震性能的影响[J].沈阳大学学报:自然科学版,2013,25(2):149-155.(Li Haoran,Zhu Han,Zhu Xuechao.Influence of Beam containing Rubber Aggregate on a Frame Shear Wall Structure Seismic Performance[J].Journal of Shenyang University:Nature Science,2013,25(2):149-155.)
[10]郭磊,李建中,范立础.大跨度连续梁桥减隔震设计研究[J].土木工程学报,2006,39(3):81-85.(Guo Lei,Li Jianzhong,Fan Lichu.Research on Seismic Isolation Design for Long-span Continuous Bridges[J].China Civil Engineering Journal,2006,39(3):81-85.)
[11]王焕定,赵桂峰.多级变刚度耗能减震体系的研究[J].哈尔滨工业大学学报,2003,39(2):234-237.(Wang Huanding,Zhao Guifeng.Dissipation-energy System with Multilevel Variable-stiffness[J].Journal of Harbin Institute of Technology,2003,39(2):234-237.)
[12]付伟庆,王焕定,张永山,等.变刚度滞变耗能与隔震联合控制框架结构实验研究[J].世界地震工程,2002,18(4):73-78.(Fu Weiqin,Wang Huandin,Zhang Yongshan,et al.Test Research on Flame Structure of Combined Control with Stiffness-Variable Hysteretic Energy Dissipation and Isolation[J].World Earthquake Engineering,2002,18(4):73-78.)
[2]邓育林,彭凯,李建中.地震作用下横向碰撞对连续梁桥地震反应的影响[J].结构工程师,2007,23(2):64-68,79.(Deng Yulin,Peng Kai,Li Jianzhong.Effect of Pounding on Seismic Responses of Continuous Girder Bridges under Transverse Earthquake[J].Structural Engineers,2007,23(2):64-68,79.)
[3]重庆交通科研设计院.JTG/T B02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.(Chongqing Research and Design Institute of Communications.JTG/T B02-01-2008 Guidelines for Seismic Design of Highway Bridges[S].Beijing:China Communications Press,2008.)
[4]刘健新,赵国辉,李加武.汶川地震及中国公路桥梁抗震设计规范的变迁[J].交通科学与工程,2009,25(1):21-25.(Liu Jianxin,Zhao Guhui,Li Jiawu.Wenchuan Earthquake and Changes of the Specifications for Seismic Design of Highway Bridges in China[J].Journal of Transport Science and Engineering,2009,25(1):21-25.)
[5]朱文正,徐忠根.隔震桥梁横桥向挡块设计研究[J].土木工程与管理学报,2011,28(3):407-411.(Zhu Wenzheng,Xu Zhonggen.Design Method for Seismic Blocks of an Isolation Bridge[J].Journal of Civil Engineering and Management,2011,28(3):407-411.)
[6]江辉,李宇,杨庆山,等.浅源强震下RC梁式桥横向碰撞参数研究[J].振动与冲击,2012,31(4):53-59.(Jiang Hui,Li Yu,YANG Qingshan,et al.Parameter Study on Transverse Pounding of RC Girder Bridge under typical Strong Earthquake from Shallow Source[J].Journal of Vibration and Shock,2012,31(4):53-59.)
[7]桑振兴,高占阳,李洪泉.地震作用下桥梁横向挡块碰撞效应的有限元分析[C]∥第七届全国结构减震控制学术会议,2011.(Sang Zhenxing,Gao Zhanyang,Li Hongquan.Finite Element Analysis about the Collision Effect of Transverse Block under the Effects of Seism[C]∥The 7th Session of the National Damping Control,2011.)
[8]王军文,李建中,范立础.非规则梁桥横桥向地震碰撞反应分析[J].振动与冲击,2010,29(6):25-30,233.(Wang Junwen,Li Jianzhong,Fan Lichu.Analysis on Pounding Effect of Irregular Girder Bridges under Transverse Earthquake[J].Journal of Vibration and Shock,2010,29(6):25-30,233.)
[9]李浩然,朱涵,朱学超.横梁含橡胶集料对某框架剪力墙结构抗震性能的影响[J].沈阳大学学报:自然科学版,2013,25(2):149-155.(Li Haoran,Zhu Han,Zhu Xuechao.Influence of Beam containing Rubber Aggregate on a Frame Shear Wall Structure Seismic Performance[J].Journal of Shenyang University:Nature Science,2013,25(2):149-155.)
[10]郭磊,李建中,范立础.大跨度连续梁桥减隔震设计研究[J].土木工程学报,2006,39(3):81-85.(Guo Lei,Li Jianzhong,Fan Lichu.Research on Seismic Isolation Design for Long-span Continuous Bridges[J].China Civil Engineering Journal,2006,39(3):81-85.)
[11]王焕定,赵桂峰.多级变刚度耗能减震体系的研究[J].哈尔滨工业大学学报,2003,39(2):234-237.(Wang Huanding,Zhao Guifeng.Dissipation-energy System with Multilevel Variable-stiffness[J].Journal of Harbin Institute of Technology,2003,39(2):234-237.)
[12]付伟庆,王焕定,张永山,等.变刚度滞变耗能与隔震联合控制框架结构实验研究[J].世界地震工程,2002,18(4):73-78.(Fu Weiqin,Wang Huandin,Zhang Yongshan,et al.Test Research on Flame Structure of Combined Control with Stiffness-Variable Hysteretic Energy Dissipation and Isolation[J].World Earthquake Engineering,2002,18(4):73-78.)
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