超低硬度隔震橡胶支座的竖向力学性能研究
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摘要
为了解具有超低硬度(G值为0.196 MPa,简称G2)的天然隔震橡胶支座(简称LNR)及铅芯隔震橡胶支座(简称LRB)的竖向力学性能,采用试验方法对不同直径G2-LNR支座和G2-LRB支座进行了不同压力下竖向刚度、不同水平剪应变下竖向静刚度及不同水平连续剪切位移下支座附加竖向变形测试,对同直径G值为0.392MPa(简称G4)支座部分相同性能进行了对比测试,并将G2测试结果和理论分析结果进行了对比。测试结果表明,G2-LNR竖向刚度随竖向压力的增加呈线性增加的趋势,其不同剪应变状态下竖向静刚度随应变增加呈线性减少的趋势。G2-LRB竖向刚度随竖向压力的增加呈非线性增加,而不同剪应变状态下竖向静刚度随应变未呈现明显的变化规律。试验与理论分析结果表明,测试得到的不同剪应变状态下支座竖向静刚度与理论计算得到的支座刚度在大应变时误差较大。支座不同剪应变状态下竖向静刚度难以准确反映支座在连续水平剪应变状态下的真实刚度,采用藤田隆史考虑重叠面积竖向刚度公式可以较好地预计G2支座在不同剪切位移时支座的附加沉降位移。
The intention of this paper is to know the vertical mechanical property of LNR and LRB with shear modulus 0.196 MPa(simplified as G2).Test method is adopted,and different diameters of G2-LNR and G2-LRB are employed.The dependence of vertical sfiffness of LNR and LRB on vertical pressure and shear strain and the vertical added displacement of isolators at different continuous strain stages are measured.Other isolators with the same diameter,in which the value of G is about 0.392 MPa,is used to test comparatively.Test results of isolators with G2 are compared to the theory results.Test results show that vertical stiffness of G2-LNR will increase linearly with pressure increasing and the static vertical stiffness of that decrease linearly with shear strain increasing.It also shows that the vertical stiffness of G2-LRB will increase nonlinearly with the pressure increasing,but there is no clear law to be founded that the vertical stiffness of that changes with shear strain changing.The comparison between the static vertical stiffness of isolator with G2 and the theory calculation values shows that there is a major error in the great shear strain stage especially.During the test,the static vertical stiffness of isolator with G2 can't reflect the real one in the different continuous shear displacements.the formula based on Tengtianlongshi′s idea about flap area should be mentioned and the calculation results of vertical added drop from it can meet the test results well.
The intention of this paper is to know the vertical mechanical property of LNR and LRB with shear modulus 0.196 MPa(simplified as G2).Test method is adopted,and different diameters of G2-LNR and G2-LRB are employed.The dependence of vertical sfiffness of LNR and LRB on vertical pressure and shear strain and the vertical added displacement of isolators at different continuous strain stages are measured.Other isolators with the same diameter,in which the value of G is about 0.392 MPa,is used to test comparatively.Test results of isolators with G2 are compared to the theory results.Test results show that vertical stiffness of G2-LNR will increase linearly with pressure increasing and the static vertical stiffness of that decrease linearly with shear strain increasing.It also shows that the vertical stiffness of G2-LRB will increase nonlinearly with the pressure increasing,but there is no clear law to be founded that the vertical stiffness of that changes with shear strain changing.The comparison between the static vertical stiffness of isolator with G2 and the theory calculation values shows that there is a major error in the great shear strain stage especially.During the test,the static vertical stiffness of isolator with G2 can't reflect the real one in the different continuous shear displacements.the formula based on Tengtianlongshi′s idea about flap area should be mentioned and the calculation results of vertical added drop from it can meet the test results well.
引文
[1]周福霖.工程结构减震控制[M].北京:地震出版社,1997.ZHOU Fulin.Earthquake energy absorbing control on engineering structure[M].Beijing:Seismological Press,1997.(in Chinese)
[2]Skinner R I,Robinson W H,Mcverry G H.工程隔震概论[M].谢礼立,周雍年,赵兴权,译.北京:地震出版社,1996.Skinner R I,Robinson W H,Mcverry G H.Introduction to engineering isolation[M].XIE Lili,ZHOU Yongnian,ZHAO Xingquan,translation.Beijing:Seismological Press,1996.(in Chinese)
[3]刘文光,杨巧荣,,周福霖.建筑用铅芯橡胶隔震支座温度性能研究[J].世界地震工程,2003,19(2):39-44.LIU Wenguang,YANG Qiaorong,ZHOU Fulin.Temperature properties of lead rubber bearings for building[J].World Earthquake Engineering,2003,19(2):39-44.(in Chinese)
[4]何文福,刘文光,杨彦飞,等.橡胶支座水平剪切弹塑性能力学试验研究[J].兰州理工大学学报,2007,33(3):120-123.HE Wenfu,LIU Wenguang,YANG Yanfei,et al.Experimental investigation of elastic-plastic mechanical behaviour of horizontal shearing of rubberbearings[J].Journal of Lanzhou University of Technology,2007,33(3):120-123.(in Chinese)
[5]韩强,杜修力,刘文光,等.橡胶隔震支座拉伸性能试验研究[J].北京工业大学学报,2006,32(3):208-212.HAN Qiang,DU Xiuli,LIU Wenguang,et al.Experimental research on tension property of rubber isolators[J].Journal of Beijing University ofTechnology,2006,32(3):208-212.(in Chinese)
[6]刘文光,杨巧荣,周福霖.天然橡胶隔震支座温度相关性试验研究[J].广州大学学报:自然科学版,2002,1(6):51-56.LIU Wenguang,YANG Qiaorong,ZHOU Fulin.Temperature properties of natural rubber bearings[J].Journal of Guangzhou University:NaturalScience Edition,2002,1(6):51-56.(in Chinese)
[7]GB/T20688.12007.橡胶支座:第1部分:隔震橡胶支座试验方法[S].GB/T 20688.1 2007 Rubber Bearings:Part 1:Seismic Protection Isolators Test Methods[S].(in Chinese)
[8]Lindley P B.Natural rubber structural bearings[J].Joint Sealing and Bearing System for Concrete Structures,1981,(1):353-378.
[9]刘文光.橡胶隔震支座力学性能和隔震结构地震反应分析研究[D].北京:北京工业大学,2003.LIU Wenguang.Mechanics properties of rubber bearings and earthquake response analysis of isolated structure[D].Beijing:Beijing University ofTechnology,2003.(in Chinese)
[10]GB/T20688.32006.橡胶支座:第3部分:建筑隔震橡胶支座[S].GB/T 20688.3 2006.Rubber Bearings:Part 3:Elastometric Seismic Protection Isolators for Buildings[S].(in Chinese)
[11]Institute of architecture in Japan.隔震结构设计[M].刘文光,译.北京:地震出版社,2006.Institute of architecture in Japan.Recommendation for the design of base isolated buildings[M].LIU Wenguang,translation.Beijing:Seismologi-cal Press,2006.(in Chinese)
[12]饭冢真巨.高轴力下橡胶隔震支座的力学特性研究[C]//第9届日本地震工程研讨会.1994:1759-1764.FANZHONG Zhenju.Research on mechanics of isolator loaded by high axial force[C]//The 9th Earthquake Engineering Workshop in Japan.1994,1759-1764.(in Japanese)
[13]Mineo T,Hideyuki T,Ryuichi T.Finite-element analysis of laminated rubber bearing used in base-isolation system[J].Rubber Chemistry andTechnology,1992,1(65):46-62.
[2]Skinner R I,Robinson W H,Mcverry G H.工程隔震概论[M].谢礼立,周雍年,赵兴权,译.北京:地震出版社,1996.Skinner R I,Robinson W H,Mcverry G H.Introduction to engineering isolation[M].XIE Lili,ZHOU Yongnian,ZHAO Xingquan,translation.Beijing:Seismological Press,1996.(in Chinese)
[3]刘文光,杨巧荣,,周福霖.建筑用铅芯橡胶隔震支座温度性能研究[J].世界地震工程,2003,19(2):39-44.LIU Wenguang,YANG Qiaorong,ZHOU Fulin.Temperature properties of lead rubber bearings for building[J].World Earthquake Engineering,2003,19(2):39-44.(in Chinese)
[4]何文福,刘文光,杨彦飞,等.橡胶支座水平剪切弹塑性能力学试验研究[J].兰州理工大学学报,2007,33(3):120-123.HE Wenfu,LIU Wenguang,YANG Yanfei,et al.Experimental investigation of elastic-plastic mechanical behaviour of horizontal shearing of rubberbearings[J].Journal of Lanzhou University of Technology,2007,33(3):120-123.(in Chinese)
[5]韩强,杜修力,刘文光,等.橡胶隔震支座拉伸性能试验研究[J].北京工业大学学报,2006,32(3):208-212.HAN Qiang,DU Xiuli,LIU Wenguang,et al.Experimental research on tension property of rubber isolators[J].Journal of Beijing University ofTechnology,2006,32(3):208-212.(in Chinese)
[6]刘文光,杨巧荣,周福霖.天然橡胶隔震支座温度相关性试验研究[J].广州大学学报:自然科学版,2002,1(6):51-56.LIU Wenguang,YANG Qiaorong,ZHOU Fulin.Temperature properties of natural rubber bearings[J].Journal of Guangzhou University:NaturalScience Edition,2002,1(6):51-56.(in Chinese)
[7]GB/T20688.12007.橡胶支座:第1部分:隔震橡胶支座试验方法[S].GB/T 20688.1 2007 Rubber Bearings:Part 1:Seismic Protection Isolators Test Methods[S].(in Chinese)
[8]Lindley P B.Natural rubber structural bearings[J].Joint Sealing and Bearing System for Concrete Structures,1981,(1):353-378.
[9]刘文光.橡胶隔震支座力学性能和隔震结构地震反应分析研究[D].北京:北京工业大学,2003.LIU Wenguang.Mechanics properties of rubber bearings and earthquake response analysis of isolated structure[D].Beijing:Beijing University ofTechnology,2003.(in Chinese)
[10]GB/T20688.32006.橡胶支座:第3部分:建筑隔震橡胶支座[S].GB/T 20688.3 2006.Rubber Bearings:Part 3:Elastometric Seismic Protection Isolators for Buildings[S].(in Chinese)
[11]Institute of architecture in Japan.隔震结构设计[M].刘文光,译.北京:地震出版社,2006.Institute of architecture in Japan.Recommendation for the design of base isolated buildings[M].LIU Wenguang,translation.Beijing:Seismologi-cal Press,2006.(in Chinese)
[12]饭冢真巨.高轴力下橡胶隔震支座的力学特性研究[C]//第9届日本地震工程研讨会.1994:1759-1764.FANZHONG Zhenju.Research on mechanics of isolator loaded by high axial force[C]//The 9th Earthquake Engineering Workshop in Japan.1994,1759-1764.(in Japanese)
[13]Mineo T,Hideyuki T,Ryuichi T.Finite-element analysis of laminated rubber bearing used in base-isolation system[J].Rubber Chemistry andTechnology,1992,1(65):46-62.
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