SMA弹簧-摩擦支座在双层球面网壳结构中的隔震控制分析
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摘要
提出一种由形状记忆合金(shape memory alloy,简称SMA)螺旋弹簧和平面滑动支座组成的SMA弹簧-摩擦支座(SMA Spring-Friction Bearing,简称SFB)。根据SFB的构造和工作原理,推导了描述其力学性能的理论模型。为考察SFB在双层球面网壳结构隔震控制中的适用性和减振效果,将SFB设置在网壳屋盖与下部结构之间形成柱顶隔震机制。通过有限元分析软件SAP 2000建立含有下部结构的网壳结构隔震体系数值计算模型,针对这一网壳隔震体系的地震响应进行数值模拟。计算结果表明,SFB能够有效降低网壳结构的地震响应,并具有优良的支座位移控制性能与复位能力。
A friction bearing conbined with large size SMA coil springs was put forward to develop a new type of isolator entitled as SMA spring-friction bearing( SFB). Based on the configuration and working principle,theoretical model of mechanical performance of the SFB was derived. In order to investigate feasibility and vibration reduction effect of the SFB in double layer spherical lattice shell structures,a column top isolation structrue with the SMAbased bearings installed between the lattice shell roof and the substructure was considered. The finite element analysis software SAP 2000 was utilized to establish the numerical model of the isolated lattice shell structure with substructure. Numerical simulation of dynamic response of the seismically isolated structure was carried out. The calculation results indicated that the proposed SFB could reduce the seismic response of the lattice shell structures effectively,and that the SFB had excellent bearing displacement control performance and re-centring capability.
A friction bearing conbined with large size SMA coil springs was put forward to develop a new type of isolator entitled as SMA spring-friction bearing( SFB). Based on the configuration and working principle,theoretical model of mechanical performance of the SFB was derived. In order to investigate feasibility and vibration reduction effect of the SFB in double layer spherical lattice shell structures,a column top isolation structrue with the SMAbased bearings installed between the lattice shell roof and the substructure was considered. The finite element analysis software SAP 2000 was utilized to establish the numerical model of the isolated lattice shell structure with substructure. Numerical simulation of dynamic response of the seismically isolated structure was carried out. The calculation results indicated that the proposed SFB could reduce the seismic response of the lattice shell structures effectively,and that the SFB had excellent bearing displacement control performance and re-centring capability.
引文
[1]支旭东,范峰,沈世钊.强震下单层柱面网壳损伤及失效机理研究[J].土木工程学报,2007,40(8):29-34.
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[13]任文杰,李宏男,宋钢兵,等.新型自复位SMA阻尼器对框架结构减震控制的研究[J].土木工程学报,2013,46(6):14-20.
[14]陈鑫,李爱群,丁幼亮,等.空间网架结构形状记忆合金隔震研究[J].工程力学,2010,27(9):86-93.
[15]何小辉.钢框架新型耗能梁柱节点滞回性能的研究[D].哈尔滨:哈尔滨工业大学,2012.
[16]Bhuiyan A,Alam M.Seismic Vulnerability Assessment of a MultiSpan Continuous Highway Bridge Fitted with Shape Memory Alloy Bars and Laminated Rubber Bearing[J].Earthquake Spectra,2012,28(4):1379-1404.
[17]Liang C,Rogers C.One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials[J].Journal of Intelligent Systems and Structures,1990,1(2):207-234.
[18]Liang C,Rogers C.Shape Memory Alloy Spring with Applications in Vibration Control[J].Journal of Vibration and Acoustics,1993,115(1):129-135.
[19]Wen Y K.Method for Random Vibration of Hysteretic System[J].Journal of the Engineering Mechanics Division,1976,102(2):249-263.
[20]Constantinou M,Mokha A,Reinhorn A.Teflon Bearing in Base Isolation II:Modeling[J].Journal of Structural Engineering,1990,116(2):455-474.
[2]杜文风,高博青,董石麟.单层网壳动力失效的形式与特征研究[J].工程力学,2009,26(7):39-46.
[3]杨庆山,刘文华,田玉基.国家体育场在多点激励作用下的地震反应分析[J].土木工程学报,2008,41(2):35-41.
[4]李玉刚,支旭东,范峰.单层球壳结构地震空间相关性效应的影响因素研究[J].空间结构,2013,19(3):9-13.
[5]Tatemichi I,Kawaguchi M.A New Approach to Seismic Isolation:Possible Application in Space Structures[J].International Journal of Space Structures,2000,15(2):145-154.
[6]Constantinou M,Whittaker S,Velivasakis E.Seismic Evaluation and Retrofit of the Ataturk International Airport Terminal Building[R].Buffalo:Multi Disciplinary Center for Earthquake Engineering Research,2001.
[7]丁阳,葛金刚.黏滞阻尼器在单层网壳结构中的优化布置[J].地震工程与工程振动,2012,32(4):166-173.
[8]黄兴淮,徐赵东,杨明飞.多维地震下大跨网格结构倒塌分析与抗倒塌措施[J].东南大学学报:自然科学版,2012,42(1):109-113.
[9]Dolce M,Cardone D,Ponzo F.Shaking Table Tests on Reinforced Concrete Frames with Different Isolation Systems[J].Earthquake Engineering and Structural Dynamics,2007,36(5):573-596.
[10]Ozbulut O,Hurlebaus S.Optimal Design of Superelastic-Friction Base Isolators for Seismic Protection of Highway Bridges Against Near-Field Earthquakes[J].Earthquake Engineering and Structural Dynamics,2011,40(3):273-291.
[11]李忠献,陈海泉,刘建涛.应用SMA复合橡胶支座的桥梁隔震[J].地震工程与工程振动,2002,25(3):85-89.
[12]薛素铎,董军辉,卞晓芳,等.一种新型形状记忆合金阻尼器[J].建筑结构学报,2005,26(3):45-50.
[13]任文杰,李宏男,宋钢兵,等.新型自复位SMA阻尼器对框架结构减震控制的研究[J].土木工程学报,2013,46(6):14-20.
[14]陈鑫,李爱群,丁幼亮,等.空间网架结构形状记忆合金隔震研究[J].工程力学,2010,27(9):86-93.
[15]何小辉.钢框架新型耗能梁柱节点滞回性能的研究[D].哈尔滨:哈尔滨工业大学,2012.
[16]Bhuiyan A,Alam M.Seismic Vulnerability Assessment of a MultiSpan Continuous Highway Bridge Fitted with Shape Memory Alloy Bars and Laminated Rubber Bearing[J].Earthquake Spectra,2012,28(4):1379-1404.
[17]Liang C,Rogers C.One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials[J].Journal of Intelligent Systems and Structures,1990,1(2):207-234.
[18]Liang C,Rogers C.Shape Memory Alloy Spring with Applications in Vibration Control[J].Journal of Vibration and Acoustics,1993,115(1):129-135.
[19]Wen Y K.Method for Random Vibration of Hysteretic System[J].Journal of the Engineering Mechanics Division,1976,102(2):249-263.
[20]Constantinou M,Mokha A,Reinhorn A.Teflon Bearing in Base Isolation II:Modeling[J].Journal of Structural Engineering,1990,116(2):455-474.
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