摘要
为了研究调整箍筋的配箍方式对控制和预测RC柱构件的变形机理,在主筋相同但箍筋的配置方式及配箍率不同的6个试件的弯剪试验中,分析不同端部箍筋配置条件下试验柱的荷载—变形关系、R=1/50范围内各构件的性能、探讨承载能力极限状态的变形,端部箍筋配置条件对反复荷载下试验柱的极限承载能力和稳定性具有明显的影响;对同一变形角、不同配箍方式的试件,在反复荷载作用下,强度降低的差别较大;构件的变形量主要集中在箍筋加密区的两端,其次集中在回转角较大的位置;对柱端部箍筋进行加密,可以控制裂缝的发展以及剪切变形,而且从监测点的位移矢量分布情况可以得知,所有检测点的位移矢量均由加密区指向未加密区的趋势。
In order to study the deformation control and prediction of RC columns by adjusting stirrup configuration, a bending shear test was carried out on six specimens of RC column with the same main reinforcement but different stirrup configuration and stirrup ratio. The load-deformation relationship and the performance of the specimen in the range of R = 1/50 were analyzed, and the deformation of the ultimate limit states was discussed. The ultimate bearing capacity and the stability of the specimen under repeated loading are influenced obviously by the stirrup configuration at the end of the specimen. The specimens with the same deformation angle but different stirrup configuration have a large difference on strength retrogression when they are under the repeated loading. The deformation mainly concentrates at both ends of the specimens where the stirrup is dense, and the location where rotation angle is larger has the next most concentrated deformation. Increasing the density of the stirrup at the end of pillars can control the development of cracks and the shear deformation, and the fact that the displacement vectors of all monitoring sites have the trend of directing from the location with dense stirrup to that with non-dense stirrup can be learned by the distribution of the displacement vectors.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2015年第2期284-291,共8页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51368014)
广西自然科学基金资助项目(2011GXSFA018023)
关键词
钢筋混凝土柱
配箍率
弯剪试验
承载能力
剪切变形
RC column
stirrups ratio
bending shear test
bearing capacity
shear deformation
