摘要
通过对推导拟合的公式以及有限元模型的参数分析,研究核心段几何参数对屈曲约束支撑屈服时机及受力性能的影响.结果表明:支撑屈服前,屈服消能时机不仅跟μc值有关,还跟转换段与核心段面积比有关;支撑屈服后,可忽略支撑内核各段面积比对其应变的影响,只考虑μc对应变的影响;μc对支撑的滞回性能影响较大,随着μc的减小,支撑所能耗散的能量增大;μc的合理取值建议在0.3~0.7之间.
This paper analyzed the effects of geometrical parameters of the core segment on yielding time and mechanical performance of buckling-restrained braces(BRBS)by using the fitted formula and the finite element simulation.The results demonstrate that the yielding time is affected by the ratioμc between the length of the core and the total length of frame and the area ratio of the transition to the core segment before BRBS are yielded.Besides,after the yielding of BRBS,the strains are influenced by the ratioμc and the effect of the area ratio of each segment on the strains can be neglected.The rationμc has a great influence on the hysteretic performance of BRBS.With the decrease of the rationμc,the capability of energy dissipation of the BRB increase.And a suggestion of the ratioμc is between 0.3 to 0.7.
作者
陈凌秀
祁皑
CHEN Lingxiu;QI Ai(College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2019年第6期812-818,共7页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51678158)
福建省中青年教师教育科研项目(JT180050)
关键词
屈曲约束支撑
几何参数
核心段长度
屈服
耗能
buckling-restrained braces
geometrical parameters
core length
yielding
energy dissipation
