摘要
为研究方钢管再生混凝土柱—再生混凝土梁节点的抗震性能,对4个不同构造措施的方钢管再生混凝土柱—再生混凝土梁节点进行了低周反复加载试验,对试件破坏过程及模式进行了细致的观测,并对滞回曲线、骨架曲线、承载能力、耗能能力、延性性能及刚度退化等多项抗震性能指标进行详细分析,以此揭示不同的节点构造措施对方钢管再生混凝土柱—再生混凝土梁节点抗震性能的影响。研究结果表明:各试件的滞回曲线均较饱满,试件的受力过程均可分为弹性阶段、弹塑性阶段和破环阶段;增设节点板或加强环等措施能够提高试件的承载能力与初始刚度;各试件的平均位移延性系数在2.42~3.24具有较好的延性性能;各试件在破坏状态时的等效粘滞阻尼系数均在0.50以上,表明该型节点具有良好的耗能能力;随着加载目标位移值的不断增加,刚度退化规律呈现出先快后慢的特点。
To study the seismic performance of joints connecting recycled concrete beams to recycled concrete filled square steel tube columns,4 specimens with different structural measures were designed for the seismic tests under low reversed cyclic loading.The failure process and patterns of the specimens were observed through the tests.The P-Δcurves,skeleton curves,bearing capacity,ductility,energy dissipation and stiffness degradation of the specimens were obtained to analyze the influence of different structural measures on the seismic performance of the joints.The results show that the P-Δcurves of the specimens are relatively plump.The failure process can be divided to three stages:the elastic stage,plastic stage and broken stage.The joint-plate and reinforcement-ring can obviously improve the bearing capacity and seismic behavior of the joints.The average ductility index for the specimens is 2.42 to 3.24,which indicates that all of the specimens have excellent seismic performance with sufficient ductility.The measured values of equivalent viscous damping coefficient of the specimens at the failure state are over 0.50,which indicates that the specimens have relatively good energy dissipation ability.The stiffness of the specimens degrades fast first and then slower with the increase of the loading displacement.
作者
苏益声
周理
江兰
陆鹏
SU Yi-sheng;ZHOU Li;JIANG Lan;LU Peng(School of Civil and Architectural Engineering,Guangxi University,Nanning 530004,China;Key Laboratory of Disaster Prevention and Structural Safety of Guangxi,Guangxi University,Nanning 530004,China;College of Architecture and Urban planning,Guizhou University,Guiyang 550003,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2018年第2期620-630,共11页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51468003)
高等学校博士学科点专项科研基金联合资助项目(20134501110001)
广西科学研究与技术开发项目(桂科转14124005-1-2)
关键词
梁柱节点
再生混凝土
抗震试验
节点板
加强环
beam-column joint
recycled concrete
seismic test
joint-plate
reinforcement-ring
作者简介
通讯作者:苏益声(1956-),男,湖南醴陵人,广西大学教授,博士生导师;E-mail:suyisheng@sina.com。
