导轨式抗拉橡胶支座力学性能研究
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摘要
针对传统隔震橡胶支座在抗拉性能方面存在的不足,设计了一种为橡胶支座提供附加抗拉刚度导轨式抗拉装置(RTD),提出了可用于大高宽比高层建筑结构的新型导轨式隔震橡胶支座。借助拟静力试验,研究了天然橡胶支座LNR600和导轨式隔震橡胶支座RTD&LNR600的水平压剪和竖向抗拉力学性能;基于ABAQUS分析平台,研究了单RTD竖向抗拉力学性能本构关系,并分析了RTD&LNR600水平压剪和拉剪状态下的水平力学性能。研究结果表明:压剪状态下导轨式隔震橡胶支座RTD&LNR600的等效水平刚度较天然橡胶支座LNR600略有提高,但不超过4%;RTD&LNR600的竖向拉力-位移关系呈双线性关系,抗拉承载力远大于天然橡胶支座LNR600; RTD的抗拉性能不受偏心状态影响,力学行为可用双线性模型来进行描述;导轨式隔震橡胶支座RTD&LNR600在拉剪状态下水平性能稳定,其拉力相关性不明显。
In view of the shortcomings of traditional isolation rubber bearings in tensile performance,a rail-type anti-tensile device( RTD) was designed to provide rubber bearings with additional tensile stiffness,and a new kind of tensile rubber bearings was proposed which can be used in high-rise buildings with large aspect ratio. By pseudo-static tests,the horizontal compression-shear and vertical tensile behaviors of the natural rubber bearing LNR600 and the railtype rubber bearing RTD&LNR600 were studied. Based on the ABAQUS analysis platform,the vertical tensile constitutive relation of the RTD and the horizontal mechanical properties of the RTD&LNR600 were studied in the states of compression-shear and tension-shear. The results show that: in compression-shear state,the equivalent horizontal stiffness of RTD&LNR600 is slightly greater than that of LNR600,but not more than 4%. The vertical tensile constitutive relation of RTD&LNR600 is bilinear,and the tensile bearing capacity is greatly improved. The tensile properties of RTD are not affected by the eccentric state. It is shown the mechanical behaviors of RTD can be described by the bilinear model. The horizontal performance of RTD&LNR600 is stable in tension-shear state,and its correlation with tension is not obvious.
In view of the shortcomings of traditional isolation rubber bearings in tensile performance,a rail-type anti-tensile device( RTD) was designed to provide rubber bearings with additional tensile stiffness,and a new kind of tensile rubber bearings was proposed which can be used in high-rise buildings with large aspect ratio. By pseudo-static tests,the horizontal compression-shear and vertical tensile behaviors of the natural rubber bearing LNR600 and the railtype rubber bearing RTD&LNR600 were studied. Based on the ABAQUS analysis platform,the vertical tensile constitutive relation of the RTD and the horizontal mechanical properties of the RTD&LNR600 were studied in the states of compression-shear and tension-shear. The results show that: in compression-shear state,the equivalent horizontal stiffness of RTD&LNR600 is slightly greater than that of LNR600,but not more than 4%. The vertical tensile constitutive relation of RTD&LNR600 is bilinear,and the tensile bearing capacity is greatly improved. The tensile properties of RTD are not affected by the eccentric state. It is shown the mechanical behaviors of RTD can be described by the bilinear model. The horizontal performance of RTD&LNR600 is stable in tension-shear state,and its correlation with tension is not obvious.
引文
[1] ZHOU Fulin,TAN Ping,HEISHA Wenliuhan. Lu Shan Earthquake M7. 0 on 2013. 4. 12 and recent development on seismic isolation,energy dissipation&structural control in China[C]//13th World conference on Seismic Isolation&JSSI 20th Anniversary International Symposium. Sendai,Japan:The Japan Society of Seismic Isolation,2013:002.
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[12]苏键,温留汉·黑沙,周福霖.新型叠层橡胶隔震支座抗拉机构研究[J].工业建筑,2010,40(12):43-46.SU Jian,HEISHA Wenliuhan,ZHOU Fulin. Study on an innovation tensile-resistant device for laminated rubber bearing[J]. Industrial Construction, 2010,40(12):43-46.
[13]祁皑,商昊江.高层基础隔震结构高宽比限值分析[J].振动与冲击,2011,30(11):272-280.QI Ai,SHANG Haojiang. Analysis on limit of height-width ratio of high-rise base-isolated tructure[J]. Journal of Vibration and Shock,2011,30(11):272-280.
[14]王栋,吕西林.具有抗拉功能的隔震支座力学性能试验研究[J].建筑结构学报,2015,36(9):124-132.WANG Dong, LXilin. Experimental research on mechanical properties of anti-tension isolation bearing[J].Journal of Building Structures,2015,36(9):124-132.
[15]葛家琪,张玲,张国军,等.成都博物馆基础隔震结构隔震层抗拉性能设计研究[J].建筑结构学报,2016,37(11):16-23.GE Jiaqi,ZHANG Ling,ZHANG Guojun,et al. Study on design of tensile base performance of the chengdu museum isolation structure[J]. Journal of Building Structures,2016,37(11):16-23.
[2]罗强军,谈燕,郭明星,等.昆明天湖景秀棚改项目百米高住宅隔震结构设计[J].建筑结构,2016,46(11):33-38.LUO Qiangjun,TAN Yan,GUO Mingxing,et al. Seismic isolation structural design for a 100-meter-high residential building of Tianhu Jingxiu Shantytown Renovation project in Kunming[J]. Building Structure,2016,46(11):33-38.
[3]建筑抗震设计规范:GB 50011—2010[S].北京:中国建筑工业出版社,2010.
[4]日本免震构造协会,叶列平.图解隔震结构入门[M].北京:科学出版社,1998:61-62.
[5]日本建筑学会.隔震结构设计[M].刘文光,译.北京:地震出版社,2006:217-218.
[6]程华群,刘伟庆,王曙光.高层隔震建筑设计中隔震支座受拉问题分析[J].地震工程与工程振动,2007,27(4):161-166.CHENG Huaqun,LIU Weiqing,WANG Shuguang. Analysis of the tension of rubber bearings in the design of isolated high-rise buildings[J]. Earthquake Engineering and Engineering Dynamics,2007,27(4):161-166.
[7] KELLY J M,GRIFFITH M C,AIKEN I D. A displacement control and uplift restraint device for base isolated structures[R]. Berkeley, California, The Pacific Earthquake Engineering Research Center,1987.
[8] NAGARAJAIAH S,REINHORN A M,CONSTANTINOU M C. Experimental study of sliding isolated structures with uplift restraint[J]. Journal of Structural Engineering,1992,118(6):1666-1682.
[9] KASALANATI A, CONSTANTINOU M C. Testing and modeling of prestressed isolators[J]. Journal of Structural Engineering,2005,131(6):857-866.
[10]祁皑,林云腾.添加钢筋提高隔震结构高宽比限值的研究[J].地震工程与工程振动,2005,25(1):120-125.QI Ai,LIN Yunteng. Research on the approaches to increase the hihgt-width ratio with supplemental steel bar[J].Earthquake Engineering and Engineering Dynamics,2005,25(1):120-125.
[11]颜学渊,张永山,王焕定,等.三类三维隔震抗倾覆支座力学性能试验研究[J].振动与冲击,2009,28(10):124-129.YAN Xueyuan,ZHANG Yongshan,WANG Huanding,et al.Experimental study on mechanical properties of three kind three-dimensional base isolation and overturn resistance devices[J]. Journal of Vibration and Shock,2009,28(10):124-129.
[12]苏键,温留汉·黑沙,周福霖.新型叠层橡胶隔震支座抗拉机构研究[J].工业建筑,2010,40(12):43-46.SU Jian,HEISHA Wenliuhan,ZHOU Fulin. Study on an innovation tensile-resistant device for laminated rubber bearing[J]. Industrial Construction, 2010,40(12):43-46.
[13]祁皑,商昊江.高层基础隔震结构高宽比限值分析[J].振动与冲击,2011,30(11):272-280.QI Ai,SHANG Haojiang. Analysis on limit of height-width ratio of high-rise base-isolated tructure[J]. Journal of Vibration and Shock,2011,30(11):272-280.
[14]王栋,吕西林.具有抗拉功能的隔震支座力学性能试验研究[J].建筑结构学报,2015,36(9):124-132.WANG Dong, LXilin. Experimental research on mechanical properties of anti-tension isolation bearing[J].Journal of Building Structures,2015,36(9):124-132.
[15]葛家琪,张玲,张国军,等.成都博物馆基础隔震结构隔震层抗拉性能设计研究[J].建筑结构学报,2016,37(11):16-23.GE Jiaqi,ZHANG Ling,ZHANG Guojun,et al. Study on design of tensile base performance of the chengdu museum isolation structure[J]. Journal of Building Structures,2016,37(11):16-23.