铜基面抗拔摩擦摆支座的力学性能研究  

Mechanical property of uplift-restraint friction pendulum bearing support with Cu-stainless interfaces

作　　者：李雄彦[1] 薛素铎[1] 潘克君[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京市弘都城市规划建筑设计院,北京100045

出　　处：《振动与冲击》2013年第6期84-89,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50778006;51278008);2011年北京市教育委员会科技计划面上资助项目;高等学校博士点学科专项科研基金项目(20121103110021);北京市委组织部优秀人才资助项目

摘　　要：为克服现有摩擦摆支座聚四氟乙烯(TEFLON)摩擦面承压能力低和缺乏竖向抗拔功能的不足,对课题组的专利产品—竖向抗拔摩擦摆支座进行了力学性能研究。首先介绍了支座的基本构造,并建立了支座的理论模型。为验证理论模型的合理性,设计了竖向承载力3 000 kN铜基面的摩擦摆支座,并对其进行试验研究。试验测定了竖向抗拔摩擦摆支座滑动面间的摩擦系数,考察了竖向压力和滑移速度对摩擦系数与滞回性能的影响。结果表明:铜基面摩擦摆支座在正弦简谐激励作用下的滞回曲线为平行四边形,与传统摩擦摆支座的滞回曲线具有相同的特征,呈刚塑性;铜基摩擦摆支座的摩擦系数的平均值在0.096-0.109间;滞回曲线的测试结果与数值模拟数据吻合较好,验证了理论模型的合理性。A new type of friction pendulum bearing （FPB） with Cu-stainless steel interfaces and uplift-restraint device, which enables to overcome the shortages such as low pressure capability of TEFLON-stainless steel interfaces and no means to control the uplift of in-using FPB, was introduced. The mechanical property of the new bearing was discussed. The structural system of the bearing was illustrated, and its theoretical model was developed. Meanwhile, a loading capacity 3 000 kN FPB was manufactured for mechanical property testing. The experiment focuses on hysteretic properties and frictional coefficient, and the influences of the pressure load on the bearing and the sliding velocity of the slider were examined in detail. It is shown that the hysteretic loop of the bearing under harmonic excitation shares the parallelogram shape, which is the same as that of the in-using FPB, and the average frictional coefficient is between 0. 096 and 0. 109. In addition, there is a good agreement between the hysteretic loops obained by experiments and by the theoretical model. Therefore, it verifies the resonability of the mechanical model.

关 键 词：竖向抗拔 摩擦摆支座 铜基摩擦面 摩擦系数 滞回性能 

分 类 号：U443.36[建筑科学—桥梁与隧道工程]