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THE REDUCTION PRINCIPLE OF EARTHQUAKE AND CALCULATION OF SEISMIC COEFFICIENT OF ENGINEERING STRUCTURE USING VISCOELASTIC DAMPER
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摘要: 探讨了结构阻尼比、刚度的变化对地震反应的影响。研究表明，阻尼增加对结构的动力反应有明显的减小效果，刚度增加虽能有效地控制结构的位移反应，但不能有效地抑制结构的加速度反应;在总结分析已有研究成果的基础上，结合抗震规范，给出了安装粘弹性阻尼器后结构地震影响系数的修正计算公式。Abstract: It is explored that the effect of varying the damping ratio and stiffness of engineering structure on earthquakeaction. The analytic result shows that the increased damping ratio can effectively reduce the structural dynamic response. Theenhanced stiffness can mitigate the structural displacement response. But it can not effectively control the structuralacceleration response. Based on the analysis and conclusion of the recent research results, and then combined with theseismic code, the modified formula for seismic coefficient of engineering structure using the viscoelastic damper is given atlast.
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Key words:
- engineering structure /
- viscoelastic damper /
- mitigation earthquake /
- seismic coefficient
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GB 50011-2001 建筑抗震设计规范 [2] 周竞欧,朱伯钦,许哲明.结构力学.上海:同济大学出版社,1994.217～231 [3] 常业军,程文瀼,苏毅.粘弹性消能支撑的研究与设计.东南大学学报(自然科学版),2004,34(1):85～88 [4] 沈聚敏,周锡元,高小旺,等..抗震工程学.北京:中国建筑工业出版社,2000.49～67 [5] 常业军.粘弹性阻尼器及消能减震结构的研究与应用:[博士学位论文].南京:东南大学,2003.3 [6] 马东辉,等.阻尼比对设计反应谱的影响分析.工程抗震,1995(4):35～40 [7] Sadek F, Mohraz B. Linear Procedures for Structures with ViscoelasticDependent Dampers. ASCE, J. of Structural Engineering, 2000, 126 ( 8 ):887 ～ 895 [8] Kasai K, Fu Y M, Watanabe A. Passive Control Systems for Seismic Damage Mitigation. ASCE, J. of Structural Engineering, 1998, 124 ( 5 ):501 ～ 512 [9] 欧进萍,等.被动耗能器减振系统的研究与应用进展.地震工程与工程振动,1996,16(3):72～96 -
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