含减振子结构的巨型框架结构模型振动台试验研究  

Shaking table test of a mega-frame with vibration control substructure

作　　者：蒋庆[1,2] 姚华庭 种迅[1,3] 叶献国[1] 王静 王瀚钦 冯玉龙 JIANG Qing;YAO Huating;CHONG Xun;YE Xianguo;WANG Jing;WANG Hanqin;FENG Yulong(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China;State key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China;Anhui Key Laboratory of Civil Engineering Structures and Materials,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 [3]合肥工业大学土木工程结构与材料安徽省重点实验室,安徽合肥230009

出　　处：《建筑结构学报》2021年第7期12-19,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51878233,51408179);国家重点实验室基金项目(2015ZA04)。

摘　　要：在含减振子结构的巨型框架结构(MFVCS)中,通过在部分主、次框架的连接处,即次框架柱底部和主框架梁之间设置隔震支座,从而形成减振子结构。为研究MFVCS的减震效果,设计并制作了一个几何缩尺比为1/25的模型,通过更换最顶部的子结构柱底的支座类型,形成非减振和单减振巨型框架两个结构。通过振动台试验,得到了两结构的动力特性和加速度、位移响应,并对比分析了不同地震动作用下的减震效果。结果表明:试验过程中主体结构损伤轻微;不同地震波作用下加速度和位移峰值减震系数平均值分别为15.1%和12.3%,加速度和位移均方根减震系数平均值均为22.2%;含减振子结构的巨型框架结构具有较明显的减震效果。In the mega-frame with vibration control substructure(MFVCS), the vibration control substructure is constructed by using lead-rubber bearings to connect the bottom of common substructure with the beams of mega-frame. To study the damping effect of MFVCS, a model with a geometrical scale of 1/25 was designed and fabricated by changing the type of the bearings under the column of the top substructure, two different structures(a traditional mega-frame and a MFVCS structure) could be generated. Through shaking table tests, the dynamic characteristics, acceleration and displacement responses of the two structures were compared, and the damping effect under different earthquake records was analyzed. The results show that only minor damage occurrs in the main structure during the test. The mean values of the acceleration and peak displacement damping coefficients under different earthquake records are 15.1% and 12.3%, respectively. And the mean values of the acceleration and displacement mean square root damping coefficients are both 22.2%. The seismic responses of the MFVCS are reduced comparing with those of the traditional mega-frame structure.

关 键 词：巨型框架结构 减振子结构 振动台试验 减震效果 

分 类 号：TU973.31[建筑科学—结构工程] TU317.1