老化-荷载作用下叠层轮胎隔震垫时变力学性能  

Time-Varying Mechanical Properties of Laminated Scrap Tire Rubber Pads Subjected to Aging and Loading

作　　者：张广泰[1,2] 吴锐 李雪藩 阿迪力·赛买提 ZHANG Guang-tai;WU Rui;LI Xue-fan;SAIMAITI Adili(College of Civil Engineering,Xinjiang University,Urumqi 830047,China;Key Laboratory of Building Structure and Earthquake Resistance,Urumqi 830047,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047 [2]新疆建筑结构与抗震重点实验室,新疆乌鲁木齐830047

出　　处：《东北大学学报（自然科学版）》2021年第8期1180-1185,1193,共7页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51968070);新疆维吾尔自治区教育厅自然科学重点项目(XJEDU2020I005).

摘　　要：为研究建筑结构设计基准期(50年)内叠层轮胎隔震垫(scrap tire rubber pads,STRP)竖向力学性能的时变规律,对61组7层STRP支座施加5 MPa竖向荷载并分别进行老化31,62,93,124和154 h的荷载耦合老化试验及普通老化试验.结合荷载耦合老化后轮胎的微观扫描电镜分析(SEM)及STRP的竖向力学性能试验,研究STRP在不同老化时间下的破坏特性、竖向承载力衰减,以及竖向刚度和竖向变形性能的退化规律.研究表明:在荷载耦合老化作用下STRP表面随老化时间的增加,裂缝扩展且局部轮胎内部炭黑外移析出,STRP竖向刚度逐渐增大,竖向变形性能变差,但极限承载力无明显改变.To investigate the time-varying vertical mechanical properties of laminated scrap tire rubber pads(STRPs)within the design reference period of building structure(50 years),the tests of aging coupled with loading were carried out on the 61 groups of 7-layer STRP bearings that were subjected to aging for 31,62,93,124,and 154 h and loading of 5 MPa,separately,and the traditional aging tests without loading were also carried out under the same conditions.And then,the results of two groups were compared.The STRP failure feature,vertical bearing capacity,and vertical stiffness/deflection in different aging time were studied through vertical mechanical experiment and scanning electron microscopic.It is concluded that,as the aging time increases,the cracks of STRP surface propagate,the carbon black particles inside the tire move toward the surface of STRP,the vertical stiffness of STRP increases but vertical deformation performance of STRP declines,while the ultimate bearing capacity of STRP changes little.

关 键 词：隔震 叠层废轮胎橡胶垫 老化-荷载耦合 力学性能 时变规律 

分 类 号：TU352.12[建筑科学—结构工程]