【摘要】 某超高层钢管混凝土框架-混凝土核心筒结构因指标超限在设计中采用了耗能减震技术,为了检验该减震结构的抗震性能,制作了1/35的缩尺模型,通过在钢管混凝土框架设置阻尼器或不设置阻尼器,进行模拟地震振动台对比试验,研究了模型结构的动力特性和不同烈度地震作用下的加速度、位移和应变响应。研究结果表明:地震作用下,该钢管混凝土框架-混凝土核心筒减震结构与钢管混凝土框架-混凝土核心筒结构相比,位移、加速度和应变响应均有一定程度的降低;罕遇地震作用下,通过设置耗能减震构件,层间位移角最大值从超过规范要求的1/84减低至满足规范要求的1/130,表明该减震结构具有更优良的抗震性能。更多还原

【Abstract】 The super high CFST(concrete-filled steel tubes) frame-RC core building’s structural indexes do not meet the requirements of current design code,so the energy dissipation technology is adopted.In order to investigate the seismic performance of this structure with energy dissipating devices,the 1/35 scale model with or without the energy dissipating devices is tested respectively on the shaking table to study and contrast the seismic behavior of the model structure.The dynamic characteristics and the model responses of acceleration,deformation and strain under different earthquake intensities are analyzed.Test and analysis results show that the displacement,acceleration and strain of the model with energy dissipating devices are smaller than the model without energy dissipating devices under different earthquake intensities.The maximum of structure’s story drifts with energy dissipating devices is decreased from 1/84 to 1/130 by installing dampers under the action of rare earthquake and satisfy the requirements of the Chinese code,so the CFST frame-concrete core wall structure with energy dissipating devices demonstrates better seismic performance than this hybrid structure without energy dissipating devices.更多还原