【作者】 曾敏茹； 鲁亮； 夏婉秋； 胡宇飞；

【Author】 ZENG Min-ru;LU Liang;XIA Wan-qiu;HU Yu-fei;Department of Disaster Mitigation for Structures,Tongji University;Shanghai Municipal Engineering Design Institute (Group) Co.,Ltd.;

【机构】 同济大学结构防灾减灾工程系； 上海市政工程设计研究总院(集团)有限公司；

【摘要】 梁端弹簧型自复位框架(Self-centeringFrame,SCF)结构作为一种新型抗震结构体系,通过梁柱节点铰接构造来使整体结构抗侧刚度弱化,并在梁端设置钢板弹簧来给节点设定确定的转动刚度,从而达到地震作用下结构减震和震后结构自复位的目标。在已有理论和试验研究的基础上,对梁端弹簧型自复位框架的抗震设计方法进行了研究,并给出了此类结构的抗震性能水准以及结构的抗震设计流程。结合一幢三层自复位耗能框架结构的设计实例,进行基于性能的结构抗震设计,通过有限元模拟对该结构的动力响应进行比较分析。结果表明:梁端弹簧型自复位耗能框架结构具有较小的加速度响应和剪力响应,以及良好的变形性能,表明梁端弹簧型自复位框架结构具有优越的抗震性能。更多还原

【Abstract】 As a new type of seismic structural system,self-centering frame(SCF) structure with beam-end spring joints weakens the lateral stiffness of the entire structure by adopting hinged beam-column joints.By setting leaf spring at the beam end,the rotational stiffness of joints can be quantificationally determined to achieve the goal of structural vibration reduction under earthquake and structural self-centering.Based on the existing theory and experiment,the seismic design method of SCF with beam-end spring joints is investigated.Seismic performance level and structural seismic design process of this kind of structure are given.Combined with the design case of a three-story SCF with beam-end spring joints,the performance-based seismic design is carried out,and dynamic response of the frame is compared with a conventional reinforced concrete frame(RCF) and analyzed by finite element simulation.The analysis results show that SCF structure with beam-end spring joints has smaller acceleration response and shear response,as well as good deformation performance,which reveal s that SCF with beam-end spring joints has superior seismic performance.更多还原