钢筋混凝土摩擦阻尼器在隔震层中的应用  

Application of reinforced concrete friction damper in seismic isolation layer

作　　者：尚守平[1] 刘超 SHANG Shouping;LIU Chao(School of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《铁道科学与工程学报》2019年第3期720-728,共9页Journal of Railway Science and Engineering

基　　金：国家"十二五"科技支撑计划资助项目(2015BAL03B01)

摘　　要：针对基础隔震时隔震层水平相对位移较大的问题,提出一种钢筋混凝土摩擦阻尼器,并与钢筋沥青隔震墩组合成一种全新的复合隔震层。为研究钢筋混凝土摩擦阻尼器对上部结构动力响应的影响,对有无摩擦阻尼器2种情况下上部结构加速度峰值和隔震层最大水平相对位移进行振动台试验对比。研究结果表明:不同烈度地震波下弹簧合理压缩量不同,在台面输入加速度峰值为0.3g时弹簧合理压缩量为25 mm左右,复合隔震层隔震时上部结构加速度峰值最大可衰减66%,较隔震墩单独隔震时可使隔震层相对位移衰减40%以上。表明钢筋混凝土摩擦阻尼器使上部结构加速度衰减的同时有效降低了隔震层的相对位移,能够较为全面地降低结构的动力响应。Aiming at the problem of large relative displacement of the seismic isolation layer during the base isolation,a reinforced concrete friction damper is proposed and combined with the reinforced concrete isolation base to form a new composite isolation layer.In order to study the influence of the RC damper on the dynamic response of the superstructure and the maximum horizontal displacement of the isolation structure,the shaking table test was performed on the two conditions of friction damper and frictionless damper.The test results show that the seismic waves of different intensity have different compression springs.When the input peak acceleration is 0.3g,the compression of the spring is about 25 mm.When the composite isolation layer is isolated,the acceleration peak of the superstructure can be attenuated up to 66%.Compared with the isolation of the isolation base,the relative displacement of the isolation layer can be reduced by more than 40%.It shows that the reinforced concrete friction damper can attenuate the acceleration of the superstructure and reduce the relative displacement of the isolation layer effectively,which can reduce the dynamic response of the structure more completely.

关 键 词：钢筋沥青隔震 摩擦阻尼器 振动台试验 相对位移 

分 类 号：TU352[建筑科学—结构工程] P315.92[天文地球—地震学]