钢纤维增强异形柱框架节点受力性能试验研究

英文篇名：EXPERIMENTAL RESEARCH ON MECHANICAL BEHAVIOR OF INTERIOR JOINTS OF SPECIALLY SHAPED COLUMN FRAMES REINFORCED BY STEEL FIBER
中文刊名：工业建筑
英文刊名：Industrial Construction
作者：戎贤 ; 张健新 ; 李燕君 ; 李艳艳
英文作者：Rong Xian1 ; 2 Zhang Jianxin1 Li Yanjun3 Li Yanyan1 ; 2(1.School of Civil Engineering ; Hebei University of Technology ; Tianjin 300401 ; China ; 2.Civil Engineering Technology Research Center of Hebei Province ; Tianjin 300401 ; China ; 3.The Office of Project Cost Management ; Xingtai 054000 ; China)
中文关键词：异形柱 ; 中节点 ; 钢纤维 ; 受力性能
英文关键词：specially shaped column ; interior joint ; steel fiber ; mechanical behavior
出版日期：2013-05-20
机构：河北工业大学土木工程学院;河北省土木工程技术研究中心;邢台市建设工程造价管理站;
年：2013
期：05
出版单位：工业建筑

摘要

为了解决异形柱框架节点的薄弱问题,对核心区应用钢纤维增强的异形柱框架中节点与同条件下未用钢纤维增强的异形柱框架中节点进行拟静力试验研究,对比分析异形柱框架中节点试件的破坏特征、中节点核心区的箍筋应变、混凝土应变及异形柱框架中节点的受剪性能,研究钢纤维增强的异形柱框架节点薄弱部位受力性能。研究结果表明:应用钢纤维增强的异形柱框架中节点试件的破坏特征得到改善;在异形柱框架节点核心区掺入钢纤维可以降低加载初期中节点核心区的箍筋应变,中节点腹板在平行于剪力方向的箍筋应变大于腹板垂直剪力方向的箍筋应变及翼缘处的箍筋应变;在中节点核心区掺入钢纤维可提高腹板混凝土的主拉应变和异形柱节点受剪承载力。
To solve the weak part of joints with specially shaped column frames,the joint of specially shaped column frames reinforced by steel fiber and the one without reinforcement in the core zone were tested under low cyclic loading.The results in terms of damage characteristic,stirrup strain and concrete strain variation in the core area of joint and shear behavior of joint with specially shaped columns were compared in order to research the mechanical behavior of weak part of joints with specially shaped columns reinforced by steel fiber.It is shown that the damage characteristic of joint reinforced by steel fiber is improved.The stirrup strain of joint reinforced by steel fiber is lower at beginning loading.The stirrup strain in parallel to the direction of shear force in web of joint with specially shaped columns is higher than that of in perpendicular and that of in the flange.The tensile strain for concrete in web and the shear capacity of joint reinforced by steel fiber are higher than that of without reinforcement.

引文

[1]王铁成,张学辉,赵海龙.纤维增强混凝土异形柱框架抗震性能的试验研究[J].地震工程与工程振动,2008,28(6):178-185.
    [2]Kim S D,Kim S S,Ju Y K.Strength Evaluation of Beam-ColumnConnection in the Weak Axis of H-Shaped Column[J].Engineering Structures,2008,30(6):1699-1710.
    [3]张爱林,于劲,徐敏,等.低周反复荷载作用下十字形截面钢异形柱抗震性能试验研究[J].建筑结构学报,2010,31(2):11-19.
    [4]王廷彦,李长永,张军伟.钢纤维高强混凝土框架边节点抗震性能研究[J].混凝土,2011(9):32-35.
    [5]Wu Bo,Xu Yuye.Behavior of Axially-and-Rotationally RestrainedConcrete Columns with‘+’-Shaped Cross Section and Subjectedto Fire[J].Fire Safety Journal,2009,44(2):212-218.
    [6]张学辉.低周往复荷载下纤维增强混凝土异形柱结构的试验及理论研究[D].天津:天津大学,2008.
    [7]Wang Wen.Capacity Analysis on T-Shaped Exterior Joints ofReinforcement Concrete Column[J].Journal of Harbin Institute ofTechnology,2009,41(8):186-189.
    [8]Rong Xian,Zhang Jianxin,Li Yanyan.Experimental Research onSeismic Behavior of Interior Joints of Specially Shaped ColumnsReinforced by Fiber[J].Applied Mechanics and Materials,2011(94-96):551-555.
    [9]王铁成,张学辉,康谷贻.两种混凝土异形柱框架抗震性能试验对比[J].天津大学学报,2007,40(7):791-798.
    [10]Wang Tiecheng,Zhang Xuehui.Frame Property of Unequal StoreyHeight with Specially Shaped Columns Under Cyclic Loading[J].Journal of Central South University of Technology,2010(6):1364-1369.
    [11]JGJ149—2006混凝土异形柱结构技术规范[S].
    [12]王春印,张兴民.钢纤维混凝土的阻裂机理分析及应用[J].基建优化,1998,19(4):47-48.