摘要
为了研究纤维增强混凝土(FRC)对角斜筋小跨高比连梁恢复力特性,设计制作了6个跨高比为1.0,1.25,1.5的FRC对角斜筋小跨高比连梁试件,对连梁试件进行低周反复加载试验,记录并观察试件受力全过程和试件破坏形态。基于对试验结果的分析,把试件从受力至破坏的过程分为开裂、通裂、失效3个阶段,基于对试验数据的回归,提出了三折线恢复力模型,并与试验结果进行对比分析。根据对比结果可知,建议的三折线恢复力模型计算曲线与试验骨架曲线吻合较好,较准确的反映了试件的受力破坏过程,较好的反映了跨高比不大于1.5的小跨高比FRC对角斜筋小跨高比连梁在低周反复施加荷载作用下的荷载与位移关系。
In order to study the restoring force characteristics of fiber reinforced concrete coupling beams with small span-to-depth ratio,six specimens with span-to-depth ratio of 1. 0,1. 25,1. 5 are designed and made and tested under low cyclic loading. The loading process is observed and failure modes are recorded. The loading process of specimens can be summarized with first cracking,full cracking and failure stage based on the analysis of the results,the experimental data is returned. Then the three-line models of skeleton curves of the beams are presented and compared with experimental results. The results show that the three-line models of skeleton curves agree well with the experimental skeleton curves,which clearly indicate the failure process of specimens. The restoring force model shows good agreement with the experimental behavior of coupling beams with span-depth ratio limits not more than 1. 5.
作者
车佳玲
韩冠生
梁兴文
邢朋涛
陈宙颖
Che Jia-ling Han Guan-sheng Liang Xing-wen Xing Peng-tao Chen Zhou-ying(School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China School of Civil Engineering, Xi ＇ an University of Architecture and Technology, Xi ＇ an 710055, China)
出处
《工程抗震与加固改造》
北大核心
2017年第5期41-46,40,共7页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学青年基金项目(51408328)
国家自然科学基金项目(51278402)
宁夏大学博士科研启动基金资助
关键词
连梁
纤维增强混凝土
破坏形态
骨架曲线
三折线模型
coupling beam
fiber reinforced concrete
failure mode
skeleton curve
three-line models
