- 摘 要
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（中國中元國際工程有限公司， 北京 100089）
［摘要］既有地鐵下行縱穿北京大學某教學樓2段單體，2段主體結(jié)構(gòu)采用鋼筋混凝土框架結(jié)構(gòu)，并在地下室柱頂設(shè)置鋼彈簧+黏滯阻尼器進行隔振。采用ETABS及ABAQUS軟件，分別對結(jié)構(gòu)進行了不同設(shè)防地震作用下的彈性和彈塑性分析，從結(jié)構(gòu)整體指標、隔振支座變形及阻尼器減震效果等方面，論證了結(jié)構(gòu)的抗震性能。彈性分析及彈塑性分析結(jié)果表明，結(jié)構(gòu)采用鋼彈簧隔振支座同時附加阻尼器后，結(jié)構(gòu)彈性性能及彈塑性性能均能滿足要求；隔振層阻尼器減小了彈簧支座的水平變形，同時消耗了輸入到主體結(jié)構(gòu)的地震能量，避免彈簧支座變形過大的同時，減小了整體結(jié)構(gòu)的地震剪力及變形。
［關(guān)鍵詞］柱頂彈簧隔振； 黏滯阻尼器； 高烈度區(qū)； 彈簧支座； 隔振支座
中圖分類號：TU398-7文獻標識碼：A文章編號：1002-848X(2020)16-0071-06
Seismic performance analysis and research of column top spring isolation structure
QIN Jingwei, FU Yangqiang, ZHANG Tongyi, WANG Yajun, DING Meng, HU Mingyi
（China IPPR International Engineering Co., Ltd., Beijing 100089, China）
Abstract:The existing subway goes down through the two sections of a teaching building of Peking University. The main structure of the two sections adopted the reinforced concrete frame structure, and a steel spring + viscous damper was installed on the top of the basement columns for vibration isolation. Using ETABS and ABAQUS software, the elasticity and elastoplastic analysis of the structure under different earthquakes were carried out respectively, and the seismic performance of the structure was demonstrated from the aspects of the overall structure index, deformation of the vibration isolation support and damping effect of the damper. The results of elastic analysis and elastoplastic analysis results show that after the structure adopts steel spring vibration isolation support and additional damper, the structural elastic performance and elastoplastic performance can meet the requirements; the vibration isolation layer dampers reduce the horizontal deformation of the spring support and dissipate the seismic energy input to the main structure, and the spring support is prevented from being deformed too much, and the seismic shear force and deformation of the overall structure are reduced.
Keywords:column top spring isolation structure; viscous damper; high seismic fortification intensity area; spring support; vibration isolation support
作者簡介：秦敬偉，博士，高級工程師，Email：qinjingwei@ippr.net。
