SMA-滚动隔震火炬塔的地震反应分析
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摘要
提出一种新的SMA-滚动隔震支座,建立了该支座的恢复力模型,并应用于火炬塔基础部位.研究了该隔震体系在E l-Centro地震波作用下的时程反应,并与非隔震的火炬塔结构体系进行了对比研究.计算结果表明,SMA-滚动隔震支座隔震体系的质量层最大绝对加速度可减少86.6%,上拔力减少了72.9%,轴力最大可减少87.2%.
A new SMA-rolling isolation bearing and its restoring force model is proposed.The new bearing is installed in the base of the torch tower.The time-history analysis of the seismic responses of the isolation system is performed under El-Centro seismic curve.The results are compared with the non-isolated system.According to the outcomes,the maximum absolute acceleration of the mass layer may decrease by 86.6% due to the SMA-rolling bearing,the overturn force can be cut by 72.9% and the axis force can be reduced by 87.2%.
A new SMA-rolling isolation bearing and its restoring force model is proposed.The new bearing is installed in the base of the torch tower.The time-history analysis of the seismic responses of the isolation system is performed under El-Centro seismic curve.The results are compared with the non-isolated system.According to the outcomes,the maximum absolute acceleration of the mass layer may decrease by 86.6% due to the SMA-rolling bearing,the overturn force can be cut by 72.9% and the axis force can be reduced by 87.2%.
引文
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[2]丰定国,王社良.抗震结构设计[M].武汉:武汉工业大学出版社,2001:72-73,224-226.FENG Ding-guo,WANG She-liang.Aseismic design of structure[M].Wuhan:Wuhan University of Technology Press,2001:72-73,224-226.
[3]Masashi Yamamoto,Yoshiyuki Suzuki.Practical applications of structural control systems to buildings in Japan[J].Earth-quake Engineering and Engineering Vibration,2001,21(4):32-39.
[4]何永超.日本高层建筑基础隔震技术的开发和应用[J].工业建筑,2002,32(5):29-31.HE Yong-chao.Development and application of base isolation technology for high-rise buildings in Japan[J].IndustrialConstruction,2002,32(5):29-31.
[5]E J Graesser,F ACozzarelli.Shape memory alloys as a newmaterial for a seismic isolation[J].Journal of Engineering Me-chanics,1991,117(6):2590-2608.
[6]Ottavia Corbi.Shape memory alloys and their application in structural oscillations attenuation[J].Simulation ModelingPractice and Theory,2003(11):387-402.
[7]E Ya Antonyuk,N P Plakhtienko.Dynamic modes of one seismic-damping mechanism with frictional bonds[J].Interna-tional Applied Mechanics,2004,40(6):702-708.
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