单跨飞机库结构的减震控制动力分析
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摘要
对于构造形式较为典型的大型单跨飞机库结构,提出在支承柱列设置粘滞阻尼器的方案,进行减震控制研究。按7度设防要求,对飞机库设置与未设置粘滞阻尼器的情况,分别采用3条地震波输入,计算在小震和中震下各自的结构动力时程反应,分析对比在结构总地震作用、支承柱列柱顶位移和内力等方面的减震效果。结果表明:在支承柱列设置粘滞阻尼器,使在地震工况下的结构总地震作用、柱顶位移、柱剪力及弯矩等明显减小,并改善了由结构不对称导致的整体扭转效应,是一项可行且有效的减震措施。
Seismic vibration control of a typical single-span hangar with viscous dampers in its column rows is studied.Based on the seismic fortification intensity of 7,seismic response time-history analyses of the hangar structure with and without the dampers are performed for 3 different earthquake time-history inputs,according to minor and moderate earthquake levels,respectively.The total seismic actions,lateral drifts of the supporting columns and their internal forces for the structure with and without dampers are compared for evaluation of the effects of use of viscous dampers on seismic vibration reduction.The results show that those structural seismic responses mentioned above are significantly decreased and the global torsion due to the irregularity of the structure is reduced with viscous dampers.So this seismic measure is effective and practical.
Seismic vibration control of a typical single-span hangar with viscous dampers in its column rows is studied.Based on the seismic fortification intensity of 7,seismic response time-history analyses of the hangar structure with and without the dampers are performed for 3 different earthquake time-history inputs,according to minor and moderate earthquake levels,respectively.The total seismic actions,lateral drifts of the supporting columns and their internal forces for the structure with and without dampers are compared for evaluation of the effects of use of viscous dampers on seismic vibration reduction.The results show that those structural seismic responses mentioned above are significantly decreased and the global torsion due to the irregularity of the structure is reduced with viscous dampers.So this seismic measure is effective and practical.
引文
[1]张毅刚,曹资.厦门太古飞机工程维修基地网架抗震分析[J].空间结构,1999,5(1):35-41.
[2]钱稼茹,张微敬,等.北京A380机库结构地震反应分析[J].土木工程学报,2008,41(2):9-16.
[3]沈顺高,张微敬,等.大跨度机库结构多点输入地震反应分析[J].土木工程学报,2008,41(2):17-21.
[4]曾向荣.武汉天河机场维修库屋盖结构限高条件下的受力分析和抗震性能研究[D].北京:中国航空工业规划设计研究院,2000.
[5]陈胜兵.飞机库结构设置粘滞阻尼器的减震研究[D].北京:北京工业大学,2008.
[6]GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[2]钱稼茹,张微敬,等.北京A380机库结构地震反应分析[J].土木工程学报,2008,41(2):9-16.
[3]沈顺高,张微敬,等.大跨度机库结构多点输入地震反应分析[J].土木工程学报,2008,41(2):17-21.
[4]曾向荣.武汉天河机场维修库屋盖结构限高条件下的受力分析和抗震性能研究[D].北京:中国航空工业规划设计研究院,2000.
[5]陈胜兵.飞机库结构设置粘滞阻尼器的减震研究[D].北京:北京工业大学,2008.
[6]GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
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