端部箍筋配置对RC柱变形机理影响的研究
|
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.
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.
引文
[1]邹积麟,钱稼茹.RC柱双向单调加载试验进行了研究[J].工程力学,2002,11(5):90-95.
[2]孟庆成,齐欣,赵世春.SRC+RC柱-RC梁框架结构性能分析研究[J].四川建筑科学研究,2008,34(4):39-42.
[3]伍凯,薛建阳,赵鸿铁.SRC-RC转换柱箍筋设置方式与破坏区域变迁[J].地震工程与工程震动,2012,32(5):60-65.
[4]敬登虎,刘旭东,曹双宴.端部成束筒约束RC柱[J].建筑结构,2012,42(s1):762-765.
[5]彭玮,张宇.框架构件的箍筋设置与其延性的相关性研究[J].商品与质量,2012,2(s2):239-239.
[6]李文静.框架梁柱节点核心区柱箍筋加密的施工方法[J].施工技术研究与应用,2013,22(5):40-40.
[7]程丽荣,钱稼茹,范重,等.核心配筋柱中心受压试验研究[J].工程力学,2000,12(1):579-583.
[8]李升才,章炯.反复荷载作用下焊接环式箍筋对高强混凝土柱的约束作用研究[J].建筑结构,2012,42(4):94-98.
[9]杨坤,史庆轩,赵均海.高强箍筋高强混凝土柱的塑性铰长度[J].工程力学,2013,30(2):254-259.
[10]司炳君,孙治国,王东升.高强箍筋约束高强混凝土柱抗震性能研究综述[J].土木工程学报,2009,42(4):1-9.
[11]陈宗平,薛建阳,赵鸿铁.实腹式型钢混凝土异形柱的受力性能研究[J].广西大学学报:自然科学版,2010,35(4):567-573.
[12]陈庆军,蔡健,邱元,等.双重环筋加强式梁柱节点区非线性有限元分析[J].广西大学学报:自然科学版,2009,34(4):456-462.
[13]尹维平,彭佩基.箍筋配置对轴心受压外包角钢短柱工作性能影响的试验研究[J].哈尔滨建筑工程学院学报,1982,34(1):41-52.
[14]席晓云,曹新明,郭献忠.约束混凝土在梁中的应用探讨[J].贵州工业大学学报,2013,52(1):110-115.
[15]许贻懂,王启文,陈云霞.钢筋混凝土方形柱延性性能及轴压比限值研究[J].建筑结构学报,2012,36(2):22-27.
[16]ABDULKADIR C,MUSA A.Genetic-programming-based modeling of RC beam torsional strength[J].KSCE Journal of Civil Engineering,2010,14(3):371-384.
[17]RANIA A,KHALED S.Confinement effect on the bond behaviour of beams under static and repeated loading[J].Construction and Building Materials,2013(40):934-943.
[2]孟庆成,齐欣,赵世春.SRC+RC柱-RC梁框架结构性能分析研究[J].四川建筑科学研究,2008,34(4):39-42.
[3]伍凯,薛建阳,赵鸿铁.SRC-RC转换柱箍筋设置方式与破坏区域变迁[J].地震工程与工程震动,2012,32(5):60-65.
[4]敬登虎,刘旭东,曹双宴.端部成束筒约束RC柱[J].建筑结构,2012,42(s1):762-765.
[5]彭玮,张宇.框架构件的箍筋设置与其延性的相关性研究[J].商品与质量,2012,2(s2):239-239.
[6]李文静.框架梁柱节点核心区柱箍筋加密的施工方法[J].施工技术研究与应用,2013,22(5):40-40.
[7]程丽荣,钱稼茹,范重,等.核心配筋柱中心受压试验研究[J].工程力学,2000,12(1):579-583.
[8]李升才,章炯.反复荷载作用下焊接环式箍筋对高强混凝土柱的约束作用研究[J].建筑结构,2012,42(4):94-98.
[9]杨坤,史庆轩,赵均海.高强箍筋高强混凝土柱的塑性铰长度[J].工程力学,2013,30(2):254-259.
[10]司炳君,孙治国,王东升.高强箍筋约束高强混凝土柱抗震性能研究综述[J].土木工程学报,2009,42(4):1-9.
[11]陈宗平,薛建阳,赵鸿铁.实腹式型钢混凝土异形柱的受力性能研究[J].广西大学学报:自然科学版,2010,35(4):567-573.
[12]陈庆军,蔡健,邱元,等.双重环筋加强式梁柱节点区非线性有限元分析[J].广西大学学报:自然科学版,2009,34(4):456-462.
[13]尹维平,彭佩基.箍筋配置对轴心受压外包角钢短柱工作性能影响的试验研究[J].哈尔滨建筑工程学院学报,1982,34(1):41-52.
[14]席晓云,曹新明,郭献忠.约束混凝土在梁中的应用探讨[J].贵州工业大学学报,2013,52(1):110-115.
[15]许贻懂,王启文,陈云霞.钢筋混凝土方形柱延性性能及轴压比限值研究[J].建筑结构学报,2012,36(2):22-27.
[16]ABDULKADIR C,MUSA A.Genetic-programming-based modeling of RC beam torsional strength[J].KSCE Journal of Civil Engineering,2010,14(3):371-384.
[17]RANIA A,KHALED S.Confinement effect on the bond behaviour of beams under static and repeated loading[J].Construction and Building Materials,2013(40):934-943.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心