布置黏滞阻尼器框架结构的抗震分析研究

Seismic analysis of frame structures with viscous dampers

安徽某五层框架结构幼儿园工程,场地属于抗震不利地段,结构存在竖向缩进,初步设计结果表明:多遇地震作用下,结构层间位移角略大于规范要求。采用能量法,估算得到结构附加阻尼比,在初步验证满足规范要求的情况下,建立有限元模型,对结构进行多遇地震与罕遇地震作用下的时程分析,研究结果表明:1)布置黏滞阻尼器后,结构满足“小震不坏,大震不倒”与“强柱弱梁”的要求;2)得到本工程黏滞阻尼器产品的力学参数。

A kindergarten project of five-story frame structure in Anhui Province,the site belonged to the section with unfavorable earthquake resistance,there was some vertical indentation in the structure,the preliminary design results showed that:under the action of frequent earthquakes,the interstory displacement angle of the structure is slightly larger than the Code’s requirements.Using the energy method,the additional damping ratio of the structure was estimated.The preliminary verification met the Code’s requirements,then the finite element model was established to analyze the structural time history under the action of frequent and rare earthquakes.The results showed that:(1)with arranging the viscous damper,the structure met the requirements of“no damage in small earthquake and no collapse in large earthquake”and“strong column and weak beam”;(2)The mechanical parameters of the damper were obtained,which provided the basis for the damper production.