千米级斜拉桥的减震控制
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摘要
结合工程结构被动控制领域的研究成果及进展(以大行程板式铅剪切阻尼器为例),对罕遇地震作用下千米级斜拉桥的减震控制进行了分析研究。通过对比分析大行程板式铅剪切阻尼器、粘滞阻尼器和弹性连接三者的数值计算结果发现,只要设计时阻尼器的相关参数选择恰当,大行程板式铅剪切阻尼器的减震效果要优于弹性连接,且与粘滞阻尼器相当。同时,分析了在正常运营阶段温度作用下减震装置对结构的影响。计算结果表明,大行程板式铅剪切阻尼器对结构的附加内力并不会比弹性连接引起的附加内力大,在运营阶段对结构的影响较小。大行程板式铅剪切阻尼器不仅满足了结构减震控制中对行程的要求,而且使用寿命长,构造简单,成本低,在千米级斜拉桥的减震控制中具有良好的应用前景。
The structural damping control of a kilometer-scale cable-stayed bridge under rare earthquake was researched based on the latest achievements(e.g.,the lead shear damper with long stroke) of the passive control for engineering structures.By comparing the computation results of lead shear damper,viscous damper and elastic link,it is found that the damping effect of lead shear damper with long stroke is better than that of elastic link and close to that of viscous damper as long as the parameters are chosen properly.The effects of different damping devices on the structure under the temperature effect in the serviceability limit stage were also analysed.The calculation result shows that the additional internal force induced by lead shear damper with long stroke is not larger than that induced by elastic link,and it has less impact on the structure.Because lead shear damper with long stroke could meet the requirement for displacement and its structure is simple,its service life is long and the processing cost is low,this kind of damper has a good prospect in damping control of a kilometer-scale cable-stayed bridge.
The structural damping control of a kilometer-scale cable-stayed bridge under rare earthquake was researched based on the latest achievements(e.g.,the lead shear damper with long stroke) of the passive control for engineering structures.By comparing the computation results of lead shear damper,viscous damper and elastic link,it is found that the damping effect of lead shear damper with long stroke is better than that of elastic link and close to that of viscous damper as long as the parameters are chosen properly.The effects of different damping devices on the structure under the temperature effect in the serviceability limit stage were also analysed.The calculation result shows that the additional internal force induced by lead shear damper with long stroke is not larger than that induced by elastic link,and it has less impact on the structure.Because lead shear damper with long stroke could meet the requirement for displacement and its structure is simple,its service life is long and the processing cost is low,this kind of damper has a good prospect in damping control of a kilometer-scale cable-stayed bridge.
引文
[1]张喜刚,陈艾荣.千米级斜拉桥:结构体系、性能与设计[M].北京:人民交通出版社,2010.ZHANG Xigang,CHEN Airong.Kilometer-scale CableStayed Bridge:Structure System,Performance and Design[M].Beijing:China Communications Press,2010.
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[9]周云,周福霖,邓雪松.铅阻尼器的研究和应用[J].世界地震工程,1999,15(1):53-61ZHOU Yun,ZHOU Fulin,DENG Xuesong.Research onLead Damper and Its Applications[J].World In-formation on Earthquake Engineering,1999,15(1):53-61.
[10]刘伟岸,叶爱君,王斌斌.大跨度桥梁桩基抗震简化模式的分析与探讨[J].结构工程师,2007,23(1):52-55.LIU Weian,YE Aijun,WANG Binbin.Discussion onSeismic Simplified Modes of Pile Foundation in Long-spanBridges[J].Structural Engineers,2007,23(1):52-55.
[11]燕斌.桥梁桩基础抗震简化模型比较研究[D].上海:同济大学,2007.YAN Bin.Study on Simplified Models of Bridge Pile-foundation Subjected to Earthquake[D].Shanghai:Tongji University,2007.
[12]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006.ZHOU Yun.Damping Structural Design with Metal EnergyDissipation[M].Wuhan:Wuhan University ofTechnology Press,2006.
[2]叶爱君,胡世德,范立础.超大跨度斜拉桥的地震位移控制[J].土木工程学报,2004,37(12):38-43.YE Aijun,HU Shide,FAN Lichu.Seismic Displace-mentControl for Super-long-span Cable-stayed Bridges[J].China Civil Engineering Journal,2004,37(12):38-43.
[3]CHARLES S P E,SENIOR P.Seismic Retrofit of theGolden Gate Bridge[C]//Eleventh World Conferenceon Earthquake Engineering.Acapulco,Mexico:ElsevierScience Ltd.,1996:2021-2030.
[4]王克海.桥梁抗震研究[M].北京:中国铁道出版社,2007.WANG Kehai.Study on Bridge Seismic Resistance[M].Beijing:China Railway Publishing House,2007.
[5]邬都,赵君黎,李贞新.阻尼器在我国长大桥梁建设中的应用简介[J].公路,2009(5):112-114.WU Du,ZHAO Junli,LI Zhenxin.Introduction ofApplication of Dampers in Long and Huge BridgeConstruction in China[J].Highway,2009(5):112-114.
[6]王志强,胡世德,范立础.东海大桥粘滞阻尼器参数研究[J].中国公路学报,2005,18(3):37-42.WANG Zhiqiang,HU Shide,FAN Lichu.Research onViscous Damper Parameters of Donghai Bridge[J].ChinaJournal of Highway and Transport,2005,18(3):37-42.
[7]SOONG T T,DARGUSH G F.Passive Energy Dissi-pation Systems in Structural Engineering[M].London:Wiley&Sons,1997.
[8]苏亮.剪切型和挤压型铅阻尼器研究及其工程应用[D].北京:北京工业大学,2009.SU Liang.Research and Engineering Application of LeadShear and Extrusion Dampers[D].Beijing:BeijingUniversity of Technology,2009.
[9]周云,周福霖,邓雪松.铅阻尼器的研究和应用[J].世界地震工程,1999,15(1):53-61ZHOU Yun,ZHOU Fulin,DENG Xuesong.Research onLead Damper and Its Applications[J].World In-formation on Earthquake Engineering,1999,15(1):53-61.
[10]刘伟岸,叶爱君,王斌斌.大跨度桥梁桩基抗震简化模式的分析与探讨[J].结构工程师,2007,23(1):52-55.LIU Weian,YE Aijun,WANG Binbin.Discussion onSeismic Simplified Modes of Pile Foundation in Long-spanBridges[J].Structural Engineers,2007,23(1):52-55.
[11]燕斌.桥梁桩基础抗震简化模型比较研究[D].上海:同济大学,2007.YAN Bin.Study on Simplified Models of Bridge Pile-foundation Subjected to Earthquake[D].Shanghai:Tongji University,2007.
[12]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006.ZHOU Yun.Damping Structural Design with Metal EnergyDissipation[M].Wuhan:Wuhan University ofTechnology Press,2006.
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