摘要
研究刚度特征值λ对摇摆墙-框架结构弹性协同工作与弹塑性抗震韧性的影响规律。建立了静力作用下摇摆墙-框架(RWMF)结构的简化力学模型并进行求解,得到λ值对内力和侧移的基本影响规律。利用ABAQUS建立了6个具有不同λ值的RWMF有限元模型,并进行动力弹塑性分析,研究λ值对其层间侧移集中性、塑性铰分布和出铰率等韧性指标的影响规律,并基于以上指标对λ值进行优化。在弹性状态下,减小λ值可以使RWMF变形均匀且受力更加合理;在弹塑性状态下,减小λ值可有效避免框架的层屈服破坏,使结构变为整体型破坏模式。当λ值在4.5~6.5时,目标函数Z(λ)取得最优解。λ值的优选范围与RWMF结构的内力与变形规律对指导RWMF结构的初步设计具有重要意义。
Aiming at investigating influences of stiffness characteristic valueλon co-operation and earthquake resilient performance of rocking wall moment frame(RWMF)structures,a simplified mechanical model under static force was proposed and solved,and regularities ofλon deformations and forces were obtained.Furthermore,six RWMF finite element models with differentλare developed using ABAQUS for dynamic elastic-plastic analysis.The effects ofλon inter-story drift concentricity,plastic hinge distribution,and hinged rate,which are indicators of resilience,are studied.Based on above indicators,an optimization analysis ofλis conducted.The results show that the decrease ofλpromotes uniform deformation and more reasonable force distribution in the elastic state.In the elastoplastic state,the decrease ofλcan avoid the soft story mechanism of frame,leading to a global failure mode.The optimal solution is obtained whenλis between 4.5 and 6.5.The preferred range ofλand the law of forces and deformations are important for guiding the preliminary design of RWMF structures.
作者
苏醒
阎石
高跃峰
夏伟军
SU Xing;YAN Shi;GAO Yuefeng;XIA Weijun(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Yantai Zhifu District Comprehensive Administrative Law Enforcement Bureau,Yantai,China,264000;Shenyang Xinhu Real Estate Co.Ltd.,Shenyang,China,110020)
出处
《沈阳建筑大学学报(自然科学版)》
北大核心
2025年第1期10-19,共10页
Journal of Shenyang Jianzhu University:Natural Science
基金
国家自然科学基金项目(52378357)。
关键词
摇摆墙-框架结构
刚度特征值λ
协同工作
动力弹塑性分析
抗震韧性
frame rocking wall structures
stiffness characteristic valueλ
co-operation performance
dynamic elastoplastic analysis
seismic resilient performance(SRP)
作者简介
苏醒(1993-),女,博士,主要从事可恢复功能结构等方面研究。
