摘要
针对低碳钢耗能器的耗能性能,设计了6个试件的循环拉伸试验,研究了不同尺寸设置的的耗能器在承载能力、耗能能力、位移延性、刚度退化等方面的差异。在此基础上,根据已有研究提出的相互作用参数确定方法,改进耗能器粘结段设置,修正相互作用参数,分析低碳钢与约束系统的相互作用受力机理。研究结果表明:低碳钢耗能器的滞回曲线形状饱满,耗能性能优越;粘结段的设置对耗能器屈服强度有提升;耗能器耗能段的直径与端部直径的差值对耗能器的性能有重要影响;在后期加载阶段,约束系统和低碳钢的相互作用效应显著,受力机制较为明确;低碳钢耗能段整体的变形性能较好,在耗能性能上具有较大的优势。
In view of the energy dissipation performance of mild steel dissipaters,the cyclic tensile test of six specimens are designed to study the differences of dissipaters with different sizes at carrying capacity,dissipation capacity. On this basis,according to the method of determining the interaction parameters proposed by the existing research,the setting of dissipater bonding section is improved,the interaction parameters are modified,the interaction mechanism between the low carbon steel and the restraint system was analyzed. The results show that the hysteresis curve shape of replaceable mild steel dissipaters is full and the energy dissipation capacity is superior.The setting of bonding section can improve the yield strength of the dissipaters. The diameter difference between the energy dissipation section and the end has an important influence on the performance of dissipaters. In the later stage of loading,the interaction effect between restraint system and mild steel is significant and the carrying mechanism is clear. The deformation performance of the mild steel energy dissipation section is better,and it has great advantages in energy dissipation performance.
作者
曲秀姝
付潇
孙岩波
刘彬
Qu Xiu-shu;Fu Xiao;Sun Yan-bo;Liu Bin(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Building Construction Research Institute Co.Ltd,Beijing 100039,China)
出处
《工程抗震与加固改造》
北大核心
2021年第1期109-117,共9页
Earthquake Resistant Engineering and Retrofitting
基金
国家重点研发项目(2017YFC0703806)
北京市自然基金面上项目(82020111)
北京建筑大学建大英才计划(JDYC20160205)。
关键词
低碳钢耗能器
相互作用参数
耗能性能
循环拉伸
滞回曲线
mild steel dissipater
interaction parameter
energy dissipation performance
cyclic tension
hysteresis curve
作者简介
曲秀姝(1982-),女,博士,副教授。
