预压应力钢护筒加固钢筋混凝土短柱轴压承载力研究
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摘要
对配有纵向钢筋和箍筋的混凝土柱采用预应力钢护筒进行加固,使需要加固的混凝土柱在不遭受破损的情况下承载能力、变形能力及抗震性能均得到提高,该加固方法是作者发明的一种新的加固方法。为对这一新的加固体系的轴向承载力展开研究,在统一强度理论的基础上,通过分析预应力钢护筒加固的混凝土短柱轴心受压时的受力情况,考虑预应力、钢护筒和箍筋对混凝土的双重约束作用,导出了配筋钢护筒混凝土短柱的轴压承载力计算公式。比较计算了普通植筋扩大断面法、预应力钢筒加固混凝土柱的承载能力,结果表明:统一强度理论对于钢护筒配筋混凝土轴压短柱的理论计算有非常好的适用性,为预应力钢护筒混凝土柱的承载力分析计算提供了理论基础。
The concrete column with longitudinal reinforcements and stirrups is strengthened with pre-stressed steel shield in order to increase the column 's bearing capacity under the condition of no suffer damage. Based on unified strength theory,the axial compression performances of short concrete column strengthened with pre-stressed steel shield are anayzied. On considering the constraint function of steel shield and the stirrup,the bearing capacity formul of the column strengthened with steel shield under ultimate axial compressive are derived. The analysis and calculation are carried out in order to compare the bearing capacity of the concrete columns strengthened with normal weld steel bars and enlarged section,and streng thened with pre-stressed stde shield. The results show that unified strength theory is suitable for the theoretical calculation of short concrete columns strengthened with steel shield,which provides theoretical basis for analysis and calculation of the concrete columns strengthened with pre-stressed steel shield.
The concrete column with longitudinal reinforcements and stirrups is strengthened with pre-stressed steel shield in order to increase the column 's bearing capacity under the condition of no suffer damage. Based on unified strength theory,the axial compression performances of short concrete column strengthened with pre-stressed steel shield are anayzied. On considering the constraint function of steel shield and the stirrup,the bearing capacity formul of the column strengthened with steel shield under ultimate axial compressive are derived. The analysis and calculation are carried out in order to compare the bearing capacity of the concrete columns strengthened with normal weld steel bars and enlarged section,and streng thened with pre-stressed stde shield. The results show that unified strength theory is suitable for the theoretical calculation of short concrete columns strengthened with steel shield,which provides theoretical basis for analysis and calculation of the concrete columns strengthened with pre-stressed steel shield.
引文
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[19]赵均海,孟晓健,刘建军,等.圆中空夹层钢管混凝土短柱的承载力[J].长安大学学报(自然科学版),2009,29(1):70~74Zhao Jun-hai,Meng Xiao-jian,Liu Jian-jun,et al.Bearing Capacity of Concrete-filled Double-skin Steeltube Stub Column[J].Journal of Changan University(Natural Science Edition),2009,29(1):70~74(in Chinese)
[20]翟越,赵均海,计琳,等.钢管混凝土轴向受压短柱承载力的统一解[J].长安大学学报(自然科学版),2006,26(3):55~58Zhai Yue,Zhao Jun-hai,Ji Lin,et al.Unified Solutions on Axial Compressive Strength of Concrete Filled Steel Tube[J].Journal of Changan University(Natural Science Edition),2006,26(3):55~58(in Chinese)
[21]赵均海.强度理论及其工程应用[M].北京:科学出版社,2003Zhao Jun-hai.Theory of Strength and Its Application[M].Beijing:Science Press,2003(in Chinese)
[2]Lie T T,Kodur V K R.Fire Resistance of Steel Columns Filled With Bar-reinforced Concrete[J].Journal of Structural Engineering,1996,122(1):30~36
[3]韩金生,董毓利,徐赵东,等.配筋钢管混凝土柱抗压性能[J].土木建筑与环境工程,2009,31(3):11~17Han Jin-sheng,Dong Yu-li,Xu Zhao-dong,et al.Analysis of Axial Compression Performance for Reinforcement Concrete-filled Tubular Steel[J].Journal of Civil,Architectural&Environmental Engineering,2009,31(3):11~17(in Chinese)
[4]吴晓莉,韩金生,程文瀼.配筋钢管混凝土柱抗火性试验研究[J].东南大学学报(自然科学版),2009,39(S2):174~178Wu Xiao-li,Han Jin-sheng,Cheng Wen-rang.Test Research on Fire Resistance Performance of Barreinforced Concrete Filled Steel Tubular Columns[J].Journal of Southeast University(Natural Science Edition),2009,39(S2):174~178(in Chinese)
[5]舒赣平,刘小萤,缪巍.配筋圆钢管混凝土轴心受压短柱试验研究与承载力分析[J].工业建筑,2010,40(4):100~106Shu Gan-ping,Liu Xiao-ying,Miao Wei.Experimental Research and Bearing Capacity Analysis of Axially Compressive Reinforced Concrete-filled Steel Tube Short Column[J].Industrial Construction,2010,40(4):100~106(in Chinese)
[6]刘朝,赵均海,王娟,等.配筋圆钢管混凝土短柱轴压承载力分析[J].建筑科学与工程学报,2011,28(4):92~96Liu Zhao,Zhao Jun-hai,Wang Juan,et al.Analysis of Axial Bearing Capacity of Reinforced Concrete-filled Circular Steel Tube Short Columns[J].Journal of Architecture and Civil Engineering,2011,28(4):92~96(in Chinese)
[7]骆涛涛,李娜,张涛,等.圆钢管混凝土柱轴心受压承载力计算[J].武汉大学学报(工学版),2014,47(6):764~768Luo Tao-tao,Li Na,Zhang Tao,et al.Bearing Capacity of Circular Concrete-filled Steel Tube Columns under Axial Compression[J].Engineering Journal of Wuhan University,2014,47(6)764~768(in Chinese)
[8]张风杰,夏军武,常鸿飞,等.薄壁圆钢管混凝土柱轴压极限承载力分析[J].混凝土,2015,(7):18~21Zhang Feng-jie,Xia Jun-wu,Chang Hong-fei,et al.Ultimate Strength Analysis to Thin-walled Circular Concrete-filled Steel Tube Column under Axial Compression[J].Journal of Concrete,2015,(7):18~21(in Chinese)
[9]杨勇,王欣林,刘义,等.预应力钢带加固钢筋混凝土柱轴压承载力试验研究[J].工业建筑,2012,42(S):183~187Yang Yong,Wang Xin-lin,Liu Yi,et al.Experimental Research in Axial Compression Bearing Capacity of Reinforced Concrete Columns Confined by Prestressed Steel Strip[J].Industrial Construction,2012,42(S):183~187(in Chinese)
[10]张波,杨勇,刘义,等.预应力钢带加固钢筋混凝土柱轴压性能试验研究[J].工程力学,2016,33(3):104~111Zhang Bo,Yang Yong,Liu Yi,et al.Experimental Study on Axial Compression Performance of Reinforced Concrete Column Retrofitted by Prestressed Steel Strip[J].Journal of Engineering Mechanics,2016,33(3):104~111(in Chinese)
[11]赵勇.预应力钢带约束混凝土方柱轴压性能试验研究[D].西安:西安建筑科技大学,2014Zhao Yong.The Experimental Study on Axial Compression Performance of Concrete Square Columns Strengthened With Prestressed Steel Strip[D].Xi'an:Xi'an University of Architecture and Technology,2014(in Chinese)
[12]赵均海,顾强,马淑芳.基于双剪统一强度理论的轴心受压钢管混凝土承载力的研究[J].工程力学,2002,19(2):32~35Zhao Jun-hai,Gu Qiang,Ms Shu-fang.The Study of the Axial Compressive Strength of Concrete Filled Steel Tube(CFST)Based on the Twin Shear Unified Strength Theory[J].Journal of Engineering Mechanics,2002,19(2):32~35(in Chinese)
[13]谭克锋,蒲心诚,蔡绍怀.钢管超高强混凝土的性能与极限承载能力的研究[J].建筑结构学报,1999,12(1):10~14Tan Ke-feng,Pu Xin-cheng,Cai Shao-huai.Study on the Mechanical Properties of Steel Extra-high Sterngth Concrete Encased in Steel Tubes[J].Journal of Building Structures,1999,12(1):10~14(in Chinese)
[14]俞茂宏,刘凤羽,刘锋,等.一个新的普遍形式的强度理论[J].土木工程学报,1990,23(1):34~40Yu Mao-hong,Liu Feng-yu,Liu Feng,et al.A New form of Common Strength Theory[J].Journal of Civil Engineering,1990,23(1):34~40(in Chinese)
[15]Yu Mao-hong.Unified Strength Theory and Its Applications[M].Berlin:Springer Press,2004(in Chinese)
[16]过镇海,时旭东.钢筋混凝土原理和分析[M].北京:清华大学出版社,2003Guo Zhen-hai,Shi Xu-dong.Reinforced Concrete Theory and Analysis[M].Beijing:Tsinghua University Press,2003(in Chinese)
[17]徐芝纶.弹性力学(上册)[M].北京:高等教育出版社,2006Xu Zhi-lun.Elastic Mechanics[M].Beijing:Higher Education Press,2006.(in Chinese)
[18]张志权,赵均海,张玉芬,等.复合钢管混凝土柱轴压承载力的计算[J].长安大学学报(自然科学版),2010,30(1):67~70Zhang Zhi-quan,Zhao Jun-hai,Zhang Yu-fen,et al.Axial Bearing Capacity of Composite Concrete-filled Steel Tubular Columns[J].Journal of Changan University(Natural Science Edition),2010,30(1):67~70(in Chinese)
[19]赵均海,孟晓健,刘建军,等.圆中空夹层钢管混凝土短柱的承载力[J].长安大学学报(自然科学版),2009,29(1):70~74Zhao Jun-hai,Meng Xiao-jian,Liu Jian-jun,et al.Bearing Capacity of Concrete-filled Double-skin Steeltube Stub Column[J].Journal of Changan University(Natural Science Edition),2009,29(1):70~74(in Chinese)
[20]翟越,赵均海,计琳,等.钢管混凝土轴向受压短柱承载力的统一解[J].长安大学学报(自然科学版),2006,26(3):55~58Zhai Yue,Zhao Jun-hai,Ji Lin,et al.Unified Solutions on Axial Compressive Strength of Concrete Filled Steel Tube[J].Journal of Changan University(Natural Science Edition),2006,26(3):55~58(in Chinese)
[21]赵均海.强度理论及其工程应用[M].北京:科学出版社,2003Zhao Jun-hai.Theory of Strength and Its Application[M].Beijing:Science Press,2003(in Chinese)