方形叠层橡胶隔震支座竖向力学性能试验研究
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摘要
为了研究方形天然胶叠层橡胶支座的竖向刚度与面压、形状系数的相关性,对4个不同形状系数的、边长为400 mm的足尺方形天然胶叠层橡胶隔震支座,分别施加10MPa,12.5 MPa,15 MPa的面压,进行了竖向力学性能试验,得到4个支座不同面压下的竖向刚度.分析了竖向刚度与面压、形状系数的相关性,得到了竖向刚度与面压相关性的经验公式.研究表明:天然胶叠层橡胶隔震支座的竖向刚度与面压相关,面压增大时,支座的竖向刚度增大;面压不变时,竖向刚度随第2形状系数的增大而增大;第2形状系数较大时,竖向刚度对面压的变化更为敏感.
In order to study the effect of compressive stress and shape factors on the vertical stiffness of square laminated rubber bearings,serial compression tests were conducted on four 400×400 mm2 full scale square laminated rubber bearings at stresses of 10 MPa,12.5 MPa and 15 MPa.The relation between the vertical stiffness,shape factors and compressive stress of the four bearings was studied and an experimental expression was obtained.The tests and analysis results have shown that the vertical stiffness of the laminated rubber bearing is compressive stress dependent,the vertical stiffness increases when the compressive stress increases;at constant compressive stress,the increase of the second shape factors will lead to the increase of vertical stiffness;and the compressive stress has more influence on vertical stiffness when the bearing has a large second shape factor value.
In order to study the effect of compressive stress and shape factors on the vertical stiffness of square laminated rubber bearings,serial compression tests were conducted on four 400×400 mm2 full scale square laminated rubber bearings at stresses of 10 MPa,12.5 MPa and 15 MPa.The relation between the vertical stiffness,shape factors and compressive stress of the four bearings was studied and an experimental expression was obtained.The tests and analysis results have shown that the vertical stiffness of the laminated rubber bearing is compressive stress dependent,the vertical stiffness increases when the compressive stress increases;at constant compressive stress,the increase of the second shape factors will lead to the increase of vertical stiffness;and the compressive stress has more influence on vertical stiffness when the bearing has a large second shape factor value.
引文
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[2]苏键,温留汉.黑沙,周福霖.建筑隔震叠层橡胶支座研究进展[J].低温建筑技术,2010(3):29-31.SUJian,WEN Liu-han.Heisha,ZHOU Fu-lin.Laminatedrubber bearings of isolated building:state-of-the-art[J].LowTemperature Architecture Technology,2010(3):29-31.(InChinese)
[3]于芳,周福霖,苏键.双向隔震桥梁与列车的耦合振动响应研究[J].湖南大学学报:自然科学版,2010,37(6):17-21.YU Fang,ZHOU Fu-lin,SU Jian.Investigation of the cou-pling dynamic response between bidirectional seismic isolatedrail way bridge and train load[J].Journal of Hunan Universi-ty:Natural Sciences,2010,37(6):17-21.(In Chinese)
[4]韩强,刘文光,杜修力,等.橡胶隔震支座竖向力学性能研究[J].辽宁工程技术大学学报,2006,25(2):217-219.HAN Qiang,LIU Wen-guang,DUXiu-li,et al.Test study on ver-tical property of rubber isolators[J].Journal of Liaoning TechnicalUniversity,2006,25(2):217-219.(In Chinese)
[5]周福霖.工程结构减震控制[M].北京:地震出版社,1997:66-68.ZHOU Fu-lin.Engineering structures seismic control[M].Beijing:Earthquake Press,1997:66-68.(In Chinese)
[6]YEOH O H.Characterization of elastic properties of carbon-black-filled rubber vulcanized[J].Rubber Chemistry Technol-ogy,1990,63(5):792-805.
[7]日本建筑学会.隔震结构设计[M].刘文光,译.北京:地震出版社,2005:28-47.Architectural Institute of Japan.Recommendationfor design ofbase isolation buildings[M].Translated by LI U Wen-guang.Beijing:Earthquake Press,2005:28-47.(In Chinese)
[8]LI NDLEY P B.Natural rubber structural bearings,joint,sealing and bearing systems for concrete structures[C]//Pro-ceedings of World Congress on Joints and Bearings.Detroit:ACI Publications,1981:353-378.
[9]GB 20688.1—2007橡胶支座第1部分:隔震橡胶支座试验方法[S].北京:中国标准出版社,2007.GB 20688.1-2007 Rubber bearings—Part 1:Seismic-pro-tectionisolators test[S].Beijing:Standards Press of China,2007.(In Chinese)
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