外套圆钢管自密实混凝土加固RC方柱偏压性能试验研究及有限元分析

发布时间：2018-01-10 06:17

本文关键词：外套圆钢管自密实混凝土加固RC方柱偏压性能试验研究及有限元分析　出处：《建筑结构学报》2015年S2期 　论文类型：期刊论文

【摘要】：对4根外套圆钢管自密实混凝土加固钢筋混凝土方柱试件进行偏心受压试验,试验结果表明:圆钢管混凝土加固方柱的破坏形态为弯曲型破坏,其承载力在达到极限以后能维持在一个相对高的荷载值,具有良好的延性,并且随着偏心率的增加,加固柱挠度增大,承载力降低。采用有限元软件ABAQUS对加固柱进行计算,并将有限元计算的承载力、荷载-跨中挠度曲线和荷载-应变曲线与试验结果进行对比,对比结果表明有限元计算结果与试验结果吻合良好。在此基础上,分析了后浇混凝土强度、钢管壁厚、偏心距对加固柱偏压性能的影响,并得到加固柱的轴力-弯矩相关曲线,可用于计算任意偏心距下加固柱的受压受弯承载力。
[Abstract]:On the 4 coat round self compacting concrete filled steel tube reinforced concrete column specimens subjected to eccentric compression test. The test results show that the failure modes of steel tube reinforcement column concrete destruction bending type, its bearing capacity can maintain the load value at a relatively high load in reaching the limit, and have good ductility. With the increase of eccentricity, reinforcement column deflection increases, reduce the bearing capacity. By using the finite element software ABAQUS of strengthened columns are calculated, and the bearing capacity of the finite element calculation, load deflection curve and load strain curve and the test results were compared. The comparison results show that the finite element calculation results agree well with the test results. On this basis, analysis of the post pouring concrete strength, steel tube wall thickness, and eccentricity influence on bias column performance of reinforcement, and axial force bending moment of strengthened columns curve can be used to calculate the partial The flexural bearing capacity of the reinforced column under the center of the heart.

【作者单位】：武汉大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51078294) 教育部博士点专项基金项目(20110141110002)
【分类号】：TU375.3
【正文快照】： 0引言目前,工程上常用的钢筋混凝土柱补强加固方法主要有增大截面加固法、外包钢加固法、外粘贴碳纤维布加固法和复合加固法[1]等,其中复合加固法中的钢管混凝土组合结构加固法,具有承载力高、刚度大、抗震性能好等突出优点[1]。Priestley[2],Xiao[3],Miller等[4-5],李鹏等[6]

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