配置大间距高强纵筋的钢筋混凝土柱抗震性能试验研究

发布时间：2018-01-18 12:33

本文关键词：配置大间距高强纵筋的钢筋混凝土柱抗震性能试验研究　出处：《建筑结构学报》2016年08期 　论文类型：期刊论文

【摘要】：为了解轴压比和纵向构造钢筋对配置大间距高强纵筋柱的抗震性能的影响,对6个配置■40大间距高强纵筋和1个普通配筋钢筋混凝土柱进行了低周反复加载试验。试验结果表明:当试验轴压比介于0.13~0.21时,与纵筋沿截面周边均匀配置的普通柱相比,仅在截面4个角部配置■40受力纵筋的混凝土柱,其水平荷载-位移滞回曲线的饱满度和耗能能力略低,屈服荷载和峰值荷载与普通配筋柱相当;轴压比为0.20~0.21的试件的极限荷载较高,但延性差;由于受力纵筋直径较大,采用■40纵筋的试件在试验轴压比范围内都会出现沿纵筋开展的黏结滑移裂缝;配置在柱根截面截断的纵向构造钢筋会在柱根形成受力薄弱面,对滞回性能和耗能能力略有影响。研究结果表明配置大间距高强纵筋柱的承载力可采用GB50010—2010《混凝土结构设计规范》中相关公式进行计算。
[Abstract]:In order to understand the axial compression ratio and longitudinal reinforcement on allocation effect of distance seismic performance of high-strength column longitudinal reinforcement, low cyclic loading test on the 6 - 40 spacing configuration of high-strength steel bars and 1 ordinary reinforced concrete columns. The experimental results show that when the ratio between 0.13~0.21 axial compression test. Compared with the surrounding section along the longitudinal uniform configuration of the ordinary column, only in the section of concrete column 4 - 40 configuration corner stress of longitudinal reinforcement, the horizontal load displacement hysteretic curves plumpness and energy dissipation capacity is slightly lower, the yield load and the peak load and the ordinary reinforcement column when the axial compression ratio; the ultimate load was higher for 0.20~0.21 specimens, but due to poor ductility; stress of longitudinal reinforcement with larger diameter, - 40 longitudinal reinforcement specimens in the test of axial compression ratio will appear within the scope of bond slip crack along the longitudinal ribs; the longitudinal structure of reinforced columns in section truncated configuration The weak surface formed on the column roots has a slight effect on the hysteretic behavior and energy dissipation capacity. The results show that the bearing capacity of the columns with large spacing and high strength longitudinal columns can be calculated by the related formulas in the GB50010 2010< concrete structure design specification.

【作者单位】：建研科技股份有限公司;中国建筑科学研究院建筑安全与环境国家重点实验室;
【基金】：“十二五”国家科技支撑计划(2011BAJ10B02,2011BAJ10B06,2014BAB15B03)
【分类号】：TU375.3;TU352.11
【正文快照】： 0引言在GB 50010—2010《混凝土结构设计规范》[1]中对柱中纵筋的间距及箍筋肢距均有相应规定,框架柱纵向受力钢筋一般沿截面周边均匀分布,有时会造成梁柱节点区钢筋密集,不便于施工,甚至难于保证混凝土的浇筑质量。装配混凝土框架结构、框架-剪力墙结构中预制梁、柱构件在现

【相似文献】