BFRP约束混凝土短柱轴压性能的截面尺寸效应研究

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (10): 21-26.

BFRP约束混凝土短柱轴压性能的截面尺寸效应研究

刘华新^*, 孙英明, 王学志, 邢宪才

辽宁工业大学土木建筑工程学院,辽宁锦州121000

收稿日期:2014-04-15 出版日期:2014-10-28 发布日期:2021-09-16
作者简介:本文作者还有柳根金。
刘华新(1966-),男,博士,教授,主要从事工程结构的加固理论研究。
基金资助:
辽宁省高等学校优秀人才支持计划(LR2012020);辽宁省教育厅基金(L2011103);辽宁省百千万人才千人层次项目(2011921059)

STUDY OF THE SECTIONAL SIZE EFFECTS OF AXIAL COMPRESSION PERFORMANCE OF CONFINED CONCRETE SHORT COLUMNS WITH BFRP SHEETS

LIU Hua-xin^*, SUN Ying-ming, WANG Xue-zhi, XING Xian-cai

Civil Engineering & Architecture College of Liaoning University of Technology, Jinzhou 121000, China

Received:2014-04-15 Online:2014-10-28 Published:2021-09-16

摘要/Abstract

摘要： 为了研究BFRP约束不同截面高宽比混凝土短柱轴压性能,进行了五种不同截面高宽比BFRP约束混凝土短柱的轴心抗压试验。按照截面高宽比、包裹层数,试件分15组,每组3个相同试件。结合试验结果,通过理论分析和数值模拟研究试件的轴心抗压强度、峰值应变及应力-应变关系。研究结果表明,各组试件的裂缝开展和破坏形态基本一致;截面高宽比不同试件的轴心抗压强度存在明显的截面尺寸效应;峰值应变随试件截面高宽比的变化比较离散,没有明显的规律;建立的强度模型与试验结果吻合较好;采用ANSYS分析软件能较好地模拟BFRP约束混凝土短柱的轴压性能。

关键词: 截面高宽比, 尺寸效应, 轴心抗压强度, 峰值应变, 数值模拟

Abstract: In order to study the axial compression performance, five different section height to width ratio of confined concrete rectangular short columns with BFRP sheets were characterized by axial compressive test. According to section height to width ratio and the layers of BFRP sheets, all specimens were divided into 15 groups, and every group has 3 specimens. The axial compressive strength, peak strain and stress-strain relationship of all specimens were also investigated by the theoretical analysis and numerical simulation. The results indicate that crack development and damage morphology are basically the same in each group. For the axial compressive strength of the specimens in each group, there is an obvious cross-sectional size effect. With the changes of specimen cross-sectional aspect ratio, peak strain is relatively discrete. The strength model agrees well with the experimental results. And the axial compressive strength of confined concrete short column can be well simulated by using ANSYS finite element analysis software.

Key words: section height to width ratio, size effect, axial compressive strength, peak strain, numerical simulation

中图分类号:

TB332

刘华新, 孙英明, 王学志, 邢宪才. BFRP约束混凝土短柱轴压性能的截面尺寸效应研究[J]. 复合材料科学与工程, 2014, 0(10): 21-26.

LIU Hua-xin, SUN Ying-ming, WANG Xue-zhi, XING Xian-cai. STUDY OF THE SECTIONAL SIZE EFFECTS OF AXIAL COMPRESSION PERFORMANCE OF CONFINED CONCRETE SHORT COLUMNS WITH BFRP SHEETS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(10): 21-26.

参考文献

[1] Rocca S, Galati N, Nanni A. Review of design guidelines for FRP confinement of reinforced concrete columns of noncircular cross sections[J]. J Compos Constr ASCE, 2008,12(1):80-92.
[2] Lam L, Teng JG. Stress-strain model for FRP-confined concrete under cyclic axial compression[J]. Eng Struct, 2009,31(2):308-321.
[3] 欧阳利军,丁斌,陆洲导.玄武岩纤维及其在建筑结构加固中的应用研究进展[J] .玻璃钢/复合材料,2010,(3) : 84-88.
[4] 曾宪桃,任振华.纤维增强塑料加固混凝土梁界面本构模型研究有关问题的分析与评价[J] . 玻璃钢/复合材料,2014,(1) : 62-67.
[5] 李燕飞,杨健辉,丁鹏,等.混杂纤维混凝土力学性能研究[J] .玻璃钢/复合材料,2013,(2) : 60-64.
[6] 贾明英, 程华. 碳纤维布(CFRP)加固混凝土圆柱约束效应的试验研究[J]. 四川建筑科学研究, 2003, 29(1): 35-36.
[7] 宋功河, 张海昆. 约束素混凝土圆柱强度及尺寸效应的试验研究[J]. 玻璃钢/复合材料, 2009, (4): 3-6.
[8] 童谷生, 刘永胜, 邱虎,等. BFRP约束钢筋混凝土轴压圆柱的尺寸效应研究[J]. 功能材料, 2009, (12): 2044-2046.
[9] 童谷生, 刘永胜, 吴秋兰. 玄武岩纤维布约束混凝土方柱的尺寸效应研究[J]. 混凝土, 2009, (3): 6-8.
[10] 马立伟, 刘铮, 祝夏. 尺寸效应对碳纤维布加固轴心受压柱的影响[J]. 科学技术与工程, 2009, 9(23): 7218-7221.
[11] Theriault M, Neale K W, Claude S. Fiber-reinforced Polymer-confined Circular Concrete Columns: Investigation of Size and Slenderness Effects[J]. Journal of Composites for Construction, 2004, 8(4): 323-331.
[12] Masiamj, Galetn and Shiveng. Size Effect in Axially Loaded Square-section Concrete Prisms Strengthened Using Carbon Fiber Reinforced Polymer Wrapping[J].Canadian Journal of Civil Engineering, 2004, 31(1): 1-13.
[13] Wang LM, Wu YF. Effect of corner radius on the performance of CFRP-confined square concrete columns: Test[J]. Eng Struct., 2008,30(2):493-505.
[14] Rochette P, Labossière P. Axial testing of rectangular column models confined with composites[J]. J Compos Constr ASCE, 2000,4(3):129-136.
[15] Cole C, Belarbi A. Confinement characteristics of rectangular FRP jacketed RC columns[C]. In: Proceeding of 5th internation- al symposium on fiber reinforced polymer for reinforce concrete structures (FRPRCS-5), Cambridge, July 16th-18th, 2001. 823-832.
[16] Maalej M, Tanwongsval S, Paramasivam P. Modeling of rectangular RC columns strengthened with FRP[J].Cement Concrete Compos., 2002,25(2):263-276.
[17] Tan KH. Strength enhancement of rectangular reinforced concrete columns using fiber- reinforced polymer[J]. J Compos Constr ASCE, 2003,6(3):175-183.
[18] Chaallal O, Shahawy M, Hassan M. Performance of axially loaded short rectangular columns strengthened with carbon fiber-reinforced polymer wrapping[J]. J Compos Constr ASCE, 2003, 7(3): 200-208.
[19] Kumutha R, Vaidyanathan R, Palanichamy MS. Behaviour of reinforced concrete rectangular columns strengthened using GFRP[J]. Cemmet Concrete Compos., 2007,29(8):609-615.
[20] Lam L, Teng J G. Design-oriented stress-strain model for FRP-confined concrete[J]. Construction and Building Materials, 2003, 17(6/7): 471-489.