基于新型支座的地铁上盖高层建筑基础隔振模型试验研究  

EXPERIMENTAL RESEARCH ON BASE ISOLATION MODEL OF OVER-TRACK HIGH-RISE BUILDINGS USING A NEW TYPE OF BEARING

作　　者：汤康生 吴燕 盛涛[1] 陈晓明[1] TANG Kangsheng;WU Yan;SHENG Tao;CHEN Xiaoming(College of Civil and Environment Engineering,Ningbo University,Ningbo 315211,China;Ningbo Rail Transit Property Co.Ltd.,Ningbo 315101,China)

机构地区：[1]宁波大学土木与环境工程学院,浙江宁波315211 [2]宁波市轨道交通物产置业有限公司,浙江宁波315101

出　　处：《工业建筑》2021年第5期76-81,163,共7页Industrial Construction

基　　金：浙江省自然科学基金项目(LY18E080011);宁波市自然科学基金项目(2019A610402)。

摘　　要：设计一种竖向刚度可精确调节的新型支座。以某地铁上盖高层建筑为原型建立1∶10缩尺模型,输入地铁和道路交通环境振动激励,分析基于新型支座的基础竖向隔振实际效果。试验结果表明:1)调整砂颗粒和橡胶颗粒的填充配合比,可实现新型支座的竖向刚度精确调节,最大误差不超过3%;2)地铁激励下高层建筑的室内振动沿楼层向上呈不规则波动变化趋势;3)应用基础竖向隔振措施后,各层楼面的竖向振级差值变小,不规则波动的变化趋势变平缓;4)基础竖向隔振措施可显著提升高层建筑的室内舒适度,楼盖的1/3倍频程分频振级最大降低15 dB,且所有楼层均满足规范舒适度要求;5)新型支座由于颗粒材料自带的摩擦耗能特性,使得基础隔振结构对道路交通引起的低频环境振动也具有较好的抗干扰性,可抑制共振现象。A new type of bearing with vertical stiffness that can be adjusted precisely was designed. A 1/10 scale model was established on the basis of a high-rise building above a subway, and the vibration excitation of subway and road traffic environment was input, and the actual effect of vertical vibration isolation based on the new type of bearing was analyzed. The test results showed: 1)the mix proportion of sand particles and rubber particles was adjusted, and the vertical stiffness of the new bearing could be precisely adjusted with a maximum error of no more than 3%;2)the trend of irregular fluctuations of indoor vibration of high-rise buildings under the excitation of the subway upward along the floor was presented;3)after applying the basic vertical vibration isolation measures, the vertical vibration level difference of each floor became smaller, and the trend of irregular fluctuations became gentle;4)after the implementation of the basic vertical vibration isolation measures, the indoor comfort of the high-rise building had been significantly improved, and the floor 1/3 octave frequency division vibration level was reduced by a maximum of about 15 dB, and all floors had met the standard comfort requirements;5)the new bearing was affected by the friction energy dissipation among sand grains, which led to the base isolation structure had a stronger anti-interference resistance to low-frequency environmental vibration caused by road traffic and could suppress resonance phenomena.

关 键 词：新型支座 地铁 竖向隔振 高层建筑 舒适度 

分 类 号：TU352.12[建筑科学—结构工程]