通信机房吊挂走线架结构抗震加固分析
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摘要
通信机房走线架结构多为吊挂体系,抗侧刚度较弱。地震作用下结构顶部位移响应过大,普遍不能满足生命线工程的抗震设防要求,需要对走线架结构进行抗震加固。针对走线架在地震作用下侧移过大,抗震性能较差的特点,通过走线架下方增加支撑架及吊挂系统增设交叉柔性支撑,提高结构抵御地震作用的能力。利用ANSYS有限元软件,对一案例加固前后走线架建立了整体有限元模型并进行弹塑性时程分析,分析抗震加固后的地震响应,验证加固效果。
Suspended systems are commonly used for cable tray structures in the telecommunication room.The lateral stiffness is weak.The displacement response of the top of the structure under seismic loading is significant,which generally cannot meet the seismic fortification criterion for lifeline facilities.Therefore anti-seismic strengthening is required for some cable tray structures.Considering the large lateral displacement and poor performance in earthquakes,support frames under cable tray were designed and cross flexible supports for the suspended system were added to improve seismic performances.The finite element models of the whole cable tray before and after strengthening were developed.Elastoplastic time-history analyses were performed to analyze seismic responses to prove the effectiveness of the strengthening strategy in this paper.
Suspended systems are commonly used for cable tray structures in the telecommunication room.The lateral stiffness is weak.The displacement response of the top of the structure under seismic loading is significant,which generally cannot meet the seismic fortification criterion for lifeline facilities.Therefore anti-seismic strengthening is required for some cable tray structures.Considering the large lateral displacement and poor performance in earthquakes,support frames under cable tray were designed and cross flexible supports for the suspended system were added to improve seismic performances.The finite element models of the whole cable tray before and after strengthening were developed.Elastoplastic time-history analyses were performed to analyze seismic responses to prove the effectiveness of the strengthening strategy in this paper.
引文
[1]周金荣,汲书强,黄维学.通信抗震防灾构筑生命工程线[J].世界电信,2008,6:21-24.Zhou Jinrong,Ji Shuqiang,Huang Weixue,Antiseismic and disaster prevention of telecommunications to construct lifeline engineering[J].World Telecommunications,2008,6:21-24.(in Chinese)
[2]中国工程建设标准化协会.CECS 160—2004建筑工程抗震性态设计通则(试用)[S].北京:计划出版社,2004.China Engineering Construction Standardization Association.CECS 160—2004 General designing principles of seismic performance in construction engineering(trial)[S].Beijing:Plan Press,2004.(in Chinese)
[3]Kehoe B E.Seismic bracing of a distributed cable tray system[C].The 14th World Conference on Earthquake Engineering,2008,10.
[4]倪锡颖.通信机房的设计[J].硅谷,2012,2:57-58.Ni Xiying.Design of telecommunications room[J].Silicon Valley,2012,2:57-58.(in Chinese)
[5]郭小农,沈祖炎,李元齐,等.铝合金轴心受压构件理论和试验研究[J].建筑结构学报,2007,28(6):118-128.Guo Xiaonong,Shen Zhuyan,Li Yuanqi,etc.Theoretical and experimental research of aluminum alloy axial compression member[J].Journal of Building Structures,2007,12:118-128.(in Chinese)
[6]郭小农,沈祖炎,李元齐,等.国产结构用铝合金材料本构关系及物理力学性能研究[J].建筑结构学报,2007,28(6):110-117.Guo Xiaonong,Shen Zhuyan,Li Yuanqi,etc.Research of material constitutive relation and physically mechanical properties of domestic structure aluminum alloy[J].Journal of Building Structures,2007,12:110-117.(in Chinese)
[7]王新敏,李义强,许宏伟.ANSYS结构分析单元与应用[M].北京:人民交通出版社,2012.Wang Xinmin,Li Yiqiang,Xu Hongwei.ANSYS structural analysis unit and application[M].Beijing:China Communications Press,2012.(in Chinese)
[8]胡大柱,李国强,孙飞飞.半刚性连接多层组合框架自振周期实用计算方法[J].世界地震工程,2008,24(2):68-73.Hu Dazhu,Li Guoqiang,Sun Feifei.Practical calculation method of natural vibration period of multilayer composite frame with semi-rigid connections[J].World Earthquake Engineering,2008,24(2):68-73.(in Chinese)
[9]李国强,沈祖炎.半刚性连接钢框架弹塑性地震反应分析[J].同济大学学报:自然科学版,1992,20(2):123-128.Li Guoqiang,Shen Zhuyan.Elastic-plastic seismic response analysis of steel frame with semi-rigid connections[J].Journal of Tongji University(Science Edition),1992,20(2):123-128(in Chinese).
[2]中国工程建设标准化协会.CECS 160—2004建筑工程抗震性态设计通则(试用)[S].北京:计划出版社,2004.China Engineering Construction Standardization Association.CECS 160—2004 General designing principles of seismic performance in construction engineering(trial)[S].Beijing:Plan Press,2004.(in Chinese)
[3]Kehoe B E.Seismic bracing of a distributed cable tray system[C].The 14th World Conference on Earthquake Engineering,2008,10.
[4]倪锡颖.通信机房的设计[J].硅谷,2012,2:57-58.Ni Xiying.Design of telecommunications room[J].Silicon Valley,2012,2:57-58.(in Chinese)
[5]郭小农,沈祖炎,李元齐,等.铝合金轴心受压构件理论和试验研究[J].建筑结构学报,2007,28(6):118-128.Guo Xiaonong,Shen Zhuyan,Li Yuanqi,etc.Theoretical and experimental research of aluminum alloy axial compression member[J].Journal of Building Structures,2007,12:118-128.(in Chinese)
[6]郭小农,沈祖炎,李元齐,等.国产结构用铝合金材料本构关系及物理力学性能研究[J].建筑结构学报,2007,28(6):110-117.Guo Xiaonong,Shen Zhuyan,Li Yuanqi,etc.Research of material constitutive relation and physically mechanical properties of domestic structure aluminum alloy[J].Journal of Building Structures,2007,12:110-117.(in Chinese)
[7]王新敏,李义强,许宏伟.ANSYS结构分析单元与应用[M].北京:人民交通出版社,2012.Wang Xinmin,Li Yiqiang,Xu Hongwei.ANSYS structural analysis unit and application[M].Beijing:China Communications Press,2012.(in Chinese)
[8]胡大柱,李国强,孙飞飞.半刚性连接多层组合框架自振周期实用计算方法[J].世界地震工程,2008,24(2):68-73.Hu Dazhu,Li Guoqiang,Sun Feifei.Practical calculation method of natural vibration period of multilayer composite frame with semi-rigid connections[J].World Earthquake Engineering,2008,24(2):68-73.(in Chinese)
[9]李国强,沈祖炎.半刚性连接钢框架弹塑性地震反应分析[J].同济大学学报:自然科学版,1992,20(2):123-128.Li Guoqiang,Shen Zhuyan.Elastic-plastic seismic response analysis of steel frame with semi-rigid connections[J].Journal of Tongji University(Science Edition),1992,20(2):123-128(in Chinese).
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