梁端弹簧型自复位钢筋混凝土框架基于性能的抗震设计方法  

PERFORMANCE-BASED SEISMIC DESIGN METHOD OF A REINFORCED CONCRETE SELF-CENTERING FRAME WITH BEAM-END SPRING JOINTS

作　　者：曾敏茹 鲁亮[1] 夏婉秋 胡宇飞 ZENG Min-ru;LU Liang;XIA Wan-qiu;HU Yu-fei(Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China;Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]同济大学结构防灾减灾工程系,上海200092 [2]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《工程力学》2024年第S01期266-274,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51678453)。

摘　　要：梁端弹簧型自复位框架(self-centering frame, 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与常规框架进行比较分析。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层剪力响应,以及良好的变形性能。研究结果表明,梁端弹簧型自复位框架结构具有优越的抗震性能。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 existing theoretical and experimental research,the seismic design method of SCF with beam-end spring joints is studied.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 the dynamic response of the frame is compared with that of a conventional reinforced concrete frame(RCF)through 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 demonstrates that SCF with beam-end spring joints has superior seismic performance.

关 键 词：梁端弹簧型自复位框架 基于性能的抗震设计方法 动力响应 抗震性能 有限元模拟 

分 类 号：TU352.11[建筑科学—结构工程] TU375.4