平面大尺度结构摩擦摆支座隔震设计研究  

Research on seismic isolation design of friction pendulum bearings for large-scale planar structures

作　　者：卜龙瑰 李爱群[1,3] 束伟农 苗启松 祁跃 解琳琳 秦凯 张翀 BU Longgui;LI Aiqun;SHU Weinong;MIAO Qisong;QI Yue;XIE Linlin;QIN Kai;ZHANG Chong(School of Civil Engineering,Southeast University,Nanjing 210096,China;Beijing Institute of Architectural Design,Beijing 100045,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]东南大学土木工程学院,南京210096 [2]北京市建筑设计研究院股份有限公司,北京100045 [3]北京建筑大学土木与交通工程学院,北京100044

出　　处：《东南大学学报(自然科学版)》2025年第2期335-343,共9页Journal of Southeast University:Natural Science Edition

基　　金：国家重点研发计划资助项目(2022YFC3003602).

摘　　要：平面大尺度结构存在温度效应及扭转效应较大的特点,摩擦摆支座存在摩擦系数稳定性偏低、起滑力较小以及水平滑移会引起竖向抬升等特点。采用摩擦摆支座隔震的平面大尺度结构,将叠加上部结构和支座的特点,形成新的设计重难点。本研究以丽江三义机场T3航站楼为实例,对平面大尺度引起的隔震设计重难点问题展开分析与研究。结果表明:采用合理的摩擦摆支座参数能达到与橡胶支座隔震相当的隔震效果;温度效应及扭转效应叠加下支座间产生明显的水平变形差异,进而引起竖向抬升差异,最终导致支座及上部结构的内力重分布,但变化幅度在5%以内;估算得到设计工作年限内因温度变化引起的支座总摩擦滑移行程约为622 m,可为摩擦材料耐磨性能要求提供量化指标依据;通过对支座关键设计参数进行敏感性分析得出,支座曲率半径越大,隔震层剪力越小,但隔震层位移显著增大;摩擦系数存在理论最优值,在一定范围内(本工程为10%以内),摩擦系数越大,隔震层位移及剪力都相应减小,综合隔震性能越好。Large-scale planar structures exhibit significant temperature and torsion effects,while friction pendulum bearings exhibit low stability in friction coefficient,low sliding force,and horizontal sliding causing vertical uplift.The use of friction pendulum bearings for isolation in large-scale planar structures will superimpose the characteristics of the upper structure and bearings,forming new design difficulties.This study takes the T3 terminal of Lijiang Sanyi Airport as an example to analyze and study the key and difficult issues in isolation design caused by large-scale plane.The results show that using reasonable parameters of friction pendulum bearings can achieve isolation effects equivalent to rubber bearings;the combination of temperature and torsion effects results in significant horizontal deformation differences between supports,causing vertical uplift differences and ultimately causing the redistribution of internal forces in supports and upper structures,but with a variation amplitude of less than 5%;the estimated total friction slip stroke of the support caused by temperature changes within the design service life is about 622 m,which can provide quantitative indicators for the wear resistance requirements of friction materials;through sensitivity analysis of key design parameters of the support,it is found that the larger the curvature radius of the support,the smaller the shear force of the iso-lation layer,but the displacement of the isolation layer significantly increases;there is a theoretical optimal value for the friction coefficient.Within a certain range(within 10%in this project),the larger the friction co-efficient,the smaller the displacement and shear force of the isolation layer,and the better the overall isolation performance.

关 键 词：摩擦摆支座 平面大尺度结构 水平变形 竖向抬升 总摩擦滑移行程 参数敏感性 

分 类 号：TU3[建筑科学—结构工程]