扇形铅粘弹性阻尼器的设计及数值仿真分析
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摘要
为改善框架结构及底框结构的抗震性能,提出一种新型扇形铅粘弹性阻尼器对梁柱节点进行耗能减震加固。介绍了扇形铅粘弹性阻尼器的构造、工作原理及特点,设计了三组铅芯个数和直径不同的扇形铅粘弹性阻尼器,采用ABAQUS有限元分析软件对其进行了剪切位移和转角位移加载的数值仿真分析,研究了阻尼器的滞回性能,加载方式、铅芯个数和直径对其耗能性能的影响,以及阻尼器耗能核心部件应力分布特点、骨架曲线和力学模型。结果表明:该阻尼器滞回曲线饱满,具有良好的耗能能力,铅芯个数和直径对其耗能性能影响较大,耗能核心部件应力分布均匀,构造合理,力学模型可采用双线性模型进行描述。
To improve aseismic performance of the frame and under frame structure,a new sector lead viscoelastic damper(SLVD) was proposed for seismic reinforcement in the beam-column joints.The construction,working principle and characteristics of SLVD were introduced.Three groups with different numbers and diameters of lead core SLVD were designed.In order to research the hysteretic performance of dampers,the effect on its energy dissipation capacity with different numbers and diameters of lead core,the stress distribution characteristics of energy dissipation core components in dampers,the skeleton curves and mechanics model,ABAQUS was used for the numerical simulation analysis of the three groups of SLVD under shear displacement and angle displacement load.Analysis results indicate that the hysteresis curve is full,its energy dissipating capacity is excellent.The number and the diameter of lead have great influence on its energy dissipation characteristics.The stress distributed evenly in dampers.The SLVD construction is reasonable and the mechanical model can be described by the double linear model.
To improve aseismic performance of the frame and under frame structure,a new sector lead viscoelastic damper(SLVD) was proposed for seismic reinforcement in the beam-column joints.The construction,working principle and characteristics of SLVD were introduced.Three groups with different numbers and diameters of lead core SLVD were designed.In order to research the hysteretic performance of dampers,the effect on its energy dissipation capacity with different numbers and diameters of lead core,the stress distribution characteristics of energy dissipation core components in dampers,the skeleton curves and mechanics model,ABAQUS was used for the numerical simulation analysis of the three groups of SLVD under shear displacement and angle displacement load.Analysis results indicate that the hysteresis curve is full,its energy dissipating capacity is excellent.The number and the diameter of lead have great influence on its energy dissipation characteristics.The stress distributed evenly in dampers.The SLVD construction is reasonable and the mechanical model can be described by the double linear model.
引文
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[3]周云,邓雪松,汤统壁,等.中国(大陆)耗能减震技术理论研究、应用的回顾与前瞻[J].工程抗震与加固改造,2006,28(6):1-15.
[4]周云.摩擦耗能减震结构设计[M].武汉:武汉理工大学出版社,2006.
[5]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006.
[6]周云.粘滞阻尼减震结构设计[M].武汉:武汉理工大学出版社,2006.
[7]周云.粘弹性阻尼减震结构设计[M].武汉:武汉理工大学出版社,2006.
[8]周云.耗能减震加固技术与设计方法[M].北京:科学出版社,2006.
[9]周云,邹征敏,邓雪松.梁柱节点加固扇形铅粘弹性阻尼器:中国,CN201560506U[P].2010-08-25.
[10]王利荣,吕振华.橡胶隔振器有限元建模技术及静态弹性特性分析[J].汽车工程,2002,24(6):480-485.
[11]张少实,庄茁.复合材料与粘弹性力学[M].北京:机械工业出版社,2007.
[12]郑明军,王文静,陈政南.橡胶Mooney-Rivlin模型力学性能常数的确定[J].橡胶工业,2003,50(8):462-465.
[13]Gracia L A,Liarte E,Pelegay J L,et al.Finite elementsimulation of the hysteretic behaviour of an industrialrubber.Application to design of rubber components[J].Finite Element in Analysis and Design,2010,46(4):357-368.
[14]Takayama M,Tada H,Tanaka R.Finite element a-nalysis of laminated rubber bearings used in base-isola-tion system[J].Rubber Chemistry and Technology,1992,65(1):46-62.
[15]唐家祥,刘再华.建筑结构基础隔震[M].武汉:华中理工大学出版社,1993.
[16]叶志雄,李黎,聂肃非.铅芯橡胶支座非线性动态特性的显式有限元分析[J].工程抗震与加固改造,2006,28(6):53-56.
[17]江宜城,聂肃非,叶志雄,等.多铅芯橡胶隔震支座非线性力学性能试验研究及其显式有限元分析[J].工程力学,2008,25(7):11-17.
[18]周云,徐赵东,邓雪松.铅粘弹性阻尼器的计算模型[J].地震工程与工程振动,2000,20(1):120-124.
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