应用新型滑移隔震装置结构的地震反应分析
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摘要
采用新型固体摩擦滑移材料二硫化钼作为涂层材料,利用实体软钢棒作为限位消能装置,提出了一种应用于框架结构既能消能又能隔震的新型分离式摩擦滑移隔震系统,探讨了其相应的设计和应用方法。采用MTS电液伺服试验系统,对文中研发的新型摩擦滑移隔震装置进行了摩擦系数测定试验,测试了摩擦滑移隔震装置的静和动力摩擦系数,建立了相应的摩擦滑移恢复力模型。采用SAP2000有限元分析软件,分析了某框架结构在抗震时和滑移隔震时的地震反应规律,从结构的加速度反应和层间位移反应、层间剪力反应等方面分析了隔震结构的减震效果。结果表明,新型摩擦滑移隔震装置的减震效果比较明显。一般情况下当场地类别为Ⅱ类,抗震设防烈度为8度时,利用新型滑移隔震结构的加速度反应可降低50%左右,层间位移反应减小明显,层间剪力反应可降低50%左右。另外,只要确定合理的构造以及实施方案,这种装置能够满足框架结构的隔震减震要求,可应用于实际工程结构。
Using the new type solid friction slip material molybdenum disulfide as coating material and the entity mild steel bar as limit and energy dissipation device,one new type of separation friction- sliding isolation system that not only has energy dissipation property but also isolation was put forward for applying in frame structures,and the design and application methods were discussed. With the MTS electro- hydraulic servo test system,the slip performance test of the new friction- sliding isolation device was done,the static and dynamic friction coefficients of the friction- sliding isolation device were tested,and the corresponding friction slip restoring force model was established. Using the finite element analysis software SAP2000,the seismic response laws of a frame structure was analyzed with or without sliding isolation,the damping effect of the isolation structure were analyzed from the acceleration response,layer displacement reaction and interlayer shear response. The results show that the new friction- sliding isolation device shock absorption effect was quite obvious,usually under the conditions that the site classification ofⅡ and the seismic fortification intensity of 8 degrees,the acceleration response could be reduced by 50% or so with using the new sliding isolation device,the layer displacement reaction decreased obviously,and the interlayer shear reaction can be reduced by 50% or so. In addition,as long as the construction and the implementation scheme are reasonable,the device can meet the shock isolation requirements of the frame structure and be applied in practical engineering.
Using the new type solid friction slip material molybdenum disulfide as coating material and the entity mild steel bar as limit and energy dissipation device,one new type of separation friction- sliding isolation system that not only has energy dissipation property but also isolation was put forward for applying in frame structures,and the design and application methods were discussed. With the MTS electro- hydraulic servo test system,the slip performance test of the new friction- sliding isolation device was done,the static and dynamic friction coefficients of the friction- sliding isolation device were tested,and the corresponding friction slip restoring force model was established. Using the finite element analysis software SAP2000,the seismic response laws of a frame structure was analyzed with or without sliding isolation,the damping effect of the isolation structure were analyzed from the acceleration response,layer displacement reaction and interlayer shear response. The results show that the new friction- sliding isolation device shock absorption effect was quite obvious,usually under the conditions that the site classification ofⅡ and the seismic fortification intensity of 8 degrees,the acceleration response could be reduced by 50% or so with using the new sliding isolation device,the layer displacement reaction decreased obviously,and the interlayer shear reaction can be reduced by 50% or so. In addition,as long as the construction and the implementation scheme are reasonable,the device can meet the shock isolation requirements of the frame structure and be applied in practical engineering.
引文
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[2]文佳,魏世宏,朱浪涛.隔震技术原理及存在问题分析[J].重庆科技学院学报(自然科学版),2007,9(12):29-30.WEN Jia,WEI Shi-hong,ZHU Langtao.On Principle and Existing Problems of Seismic Isolation Technique[J].Journal of Chongqing University of Science and Technology(Natural Sciences Edition),2007,9(12):29-30.(in Chinese)
[3]胡聿贤.地震工程学[M].北京:地震出版社,1988.HU Yixian.Earthquake engineering[M].Beijing:Seismological Press,1988.(in Chinese)
[4]周福霖.工程结构减震控制[M].北京:地震出版社,1997.ZHOU Fulin.Engineering structure damping control[M].Beijing:Seismological Press,1997.(in Chinese)
[5]N.Mostaghel,M.Khodaverdian.Dynamics of Resilient-Friction Base Isolator(R-FBI).Earthquake Engineering and Structural Dynamics,1987,15(3):379-390.
[6]张瑛.5.12汶川大地震震裂山体灾害勘查评价与治理设计方法研究[D].成都:成都理工大学,2009.ZHANG Ying.5.12 Study on Exploration,Evaluation and Control Design of Shattering Mountains in"5.12"Wenchuan earthquake[D].Chengdu:Chengdu University,2009.(in Chinese)
[7]李树信,姚谦峰.软钢实体圆锥棒的限位、消能性能研究[J].西安冶金建筑学院学报,1992,24(3):243-248.LI Shuxin,Yao Qianfeng.On the Properties of Restrained Displaccment and Energy Absorption for Mild Steel Frustum of a Cone[J].Journal of Xi’An University of Architecture&technology,1992,24(3):243-248.(in Chinese)
[8]熊仲明等.基础滑移隔震房屋的计算研究[J].土木工程学报,1995,28(5):21-30.XIONG Zhongming,et al.Study on the calculation of brick masonry structure base isolated with sliding layer[J].China Civil Engineering Journal,1995,28(5):21-30.(in Chinese)
[9]高菲.建筑物基础滑移隔震性能的研究.辽宁:辽宁工程技术大学.GAO Fei.Building foundation sliding isolation performance research.Liaoning:Liaoning Technical University.(in Chinese)
[10]Dimova S,Meskouris K,Krataig W B.Numreical Technique for Dynamic Analysis of Structures with Friction Devices[J].Earthquske Engrg Struct Dyn,1955(24).
[11]廖健敏,王清敏等.基础滑移隔震房屋动力特性的试验研究[J].建筑结构,2000,30(11):17-19.LIAO Jianmin,WANG Qingmin,et al.Experimental Investigation on Dynamic Performance of Building with Sliding Base Isolation[J].Building Structure,2000,30(11):17-19.(in Chinese)
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