摘要
为研究型钢再生混凝土柱-钢梁组合框架的抗震性能,对一榀缩尺比为1∶2.5的两跨三层组合框架试件进行拟静力试验,观察试件的受力过程及破坏模式,分析试件荷载-位移滞回曲线和骨架曲线、承载能力、层间位移角、延性系数、耗能能力及刚度退化等抗震性能指标,结果表明:组合框架破坏时,梁端率先发生明显塑性铰破坏,随后柱根部位再生混凝土压碎脱落,节点区域安全可靠,仅出现细微裂缝;组合框架的滞回曲线呈梭形状且饱满,骨架曲线下降段和刚度退化较为平缓;组合框架的位移延性系数平均值为3.205,等效黏滞阻尼系数为0.303,极限层间位移角为1/25,说明组合框架具有良好的抗震性能、耗能能力及抗倒塌能力,研究结论可为该组合框架的工程应用提供参考.
To study the seismic behaviors of steel reinforced recycled concrete(SRRC)columns-steel beams composite frame,a two-span three-story frame specimen with a scale of 1∶2.5 was tested under low-cycle repeated loading.Observing the loading process and failure mode,the mechanical properties of frame were analyzed in detail such as the load-displacement hysteresis curves,skeleton curves,bearing capacity,interlayer displacement angles,ductility,energy dissipation and stiffness degradation.The research results showed that when the frame was damaged,the plastic hinges occurred firstly at the beam ends,and then the recycled concrete at the column root fell off.The joint area was safe and reliable with only slight cracks.The hysteretic curves of frame are shuttle-shaped and full,and the descending section of skeleton curves as well as the stiffness degradation is relatively gentle.The average displacement ductility coefficient of frame is 3.205,and the equivalent viscous damping coefficient and ultimate interstory displacement angle is 0.303 and 1/25 respectively.It indicates that the frame has good seismic performance,energy dissipation and collapse resistance.The research conclusions can provide reference for the engineering application of composite frame.
作者
马辉
干秀英
席嘉诚
董静
张鹏
赵艳丽
MA Hui;GAN Xiuying;XI Jiacheng;DONG Jing;ZHANG Peng;ZHAO Yanli(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi'an 710048,China;School of Civil Engineering and Architecture,Xi’an University of Technology,Xi'an 710048,China;Research and Design Institute of Water Conservancy and Hydropower,Xi’an University of Technology,Xi'an 710048,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2022年第3期603-617,共15页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51408485)
陕西省自然科学基础研究计划项目(2022JM-258,2021JM-332)。
关键词
型钢再生混凝土柱
钢梁
组合框架
反复荷载试验
抗震性能
steel reinforced recycled concrete column
steel beam
composite frame
pseudo static test
seismic performance
