变摩擦摆隔震支座力学性能研究  

Mechanical properties of variable friction pendulum system

作　　者：张亚飞 谭平[2,3] 尚继英 王龙 梁旭 王冰 ZHANG Ya-fei;TAN Ping;SHANG Ji-ying;WANG Long;LIANG Xu;WANG Bing(GMC Grand-bay Intelligent Manufacturing and Technology Co.Ltd.,Guangzhou 510730,China;Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology,Guangzhou University,Guangzhou510405,China;Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural Safety Ministry of Education,Guangzhou University,Guangzhou 510405,China;Wuhan Hirun Engineering Equipment Co.Ltd.,Wuhan 430084,China)

机构地区：[1]广州建筑湾区智造科技有限公司,广东广州510730 [2]广州大学广东省地震工程与应用技术重点实验室,广东广州510405 [3]广州大学工程抗震减震与结构安全教育部重点实验室,广东广州510405 [4]武汉海润工程设备有限公司,湖北武汉430084

出　　处：《振动工程学报》2020年第6期1122-1130,共9页Journal of Vibration Engineering

基　　金：国家重点研发计划(2017YFC0703600);教育部创新团队项目(IRT13057);国家自然科学基金资助项目(51978185);广东省教育厅创新团队项目(2016KCXTD016);广州大学“基础创新”研究项目(2017GDJC-D16)。

摘　　要：通过等效摩擦系数的推导得到了变摩擦摆隔震支座(VFPS)的滞回性能,进而从理论上证明了VFPS具备自适应性。以理论结果为依据,采用PET高性能材料与精密加工工艺成功研制出了这一新型变摩擦摆隔震支座,并对其开展了系统的试验研究。通过二次曲线拟合得到了VFPS每一位移处的水平刚度,并结合试验得到的滞回曲线给出了支座自适应性评估指标β,且宜以β≥0.2作为评估标准。采用参数识别得到了各工况下PET的摩擦系数,其值受接触面粗糙度、加载速度及竖向荷载的影响,且PET宜在面压40MPa时使用,VFPS测试更宜采用三角波加载。以上理论与试验结果表明,VFPS在一定的加载条件下表现出明显的自适应性,其随竖向荷载及加载速度的增加而更加明显,因而VFPS适宜应对不同水准地震作用的考验。The hysteretic behavior of the variable friction pendulum system(VFPS)is obtained by deriving the equivalent friction coefficient,and the self-adaptability of VFPS is proved theoretically.Based on the theoretical results,this new type of isolator is successfully developed using PET high-performance materials and precision machining technology,and systematic experimental investigation is carried out.The horizontal stiffness of each point of VFPS is obtained by quadratic curve fitting,and the hysteresis curve obtained by the experiment gives the supportability evaluation indexβof isolator self-adaptability,andβ≥0.2 is suitable as the criterion.The friction coefficient of PET under various loading conditions is obtained by parameter identification,and the value is affected by the contact surface roughness,loading speed and vertical load.PET is suitable for using at the pressure of 40 MPa,and the triangular waveform loading is more suitable for VFPS test.The above theoretical and experimental results show that VFPS exhibits obvious self-adaptability under certain loading condition,which is more obvious with the increase of vertical load and loading speed.Therefore,VFPS is suitable for the test of earthquake action at different levels.

关 键 词：变摩擦摆隔震支座 自适应性 滞回性能 加载机制 

分 类 号：TU352.1[建筑科学—结构工程] TU973.1