内置复材管局部弱约束混凝土方柱受压性能研究

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (9): 17-25.

内置复材管局部弱约束混凝土方柱受压性能研究

孙运楼, 齐玉军^*, 刘伟庆

南京工业大学土木工程学院,南京211816

收稿日期:2016-05-12 出版日期:2016-09-28 发布日期:2016-09-28
通讯作者: 齐玉军(1982-),男,博士,讲师,主要从事新型材料及新型结构研究。
作者简介:孙运楼(1991-),男,硕士生,主要从事复合材料结构研究。
基金资助:
国家自然科学基金项目(51308287);江苏省自然科学基金项目(BK20130936)

EXPERIMANTAL STUDY ON COMPRESSION PERFORMANCE OF CONCRETE-ENCASED FRP CONFINED CONCRETE SUB-COLUMNS/CORES COLUMNS WITH WEAK CONFINE

SUN Yun-lou, QI Yu-jun^*, LIU Wei-qing

College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China

Received:2016-05-12 Online:2016-09-28 Published:2016-09-28

摘要/Abstract

摘要： 基于约束混凝土提出一种由钢筋、混凝土及缠绕管组成的内置复合材料管局部约束混凝土组合柱(Concrete-Encased FRP Confined Concrete Sub-Columns/Cores Column,简称“CEFC”),本构件截面形式为外围的钢筋混凝土类方柱和内置于4角点的FRP管约束混凝土圆柱(Concrete-Filled FRP Tube,简称“CFFT”)组合而成。通过试验研究及有限元数值模拟对钢筋混凝土柱及内置复合管局部弱约束混凝土方柱进行了轴偏压作用下力学行为的分析和比较。结果表明,弱约束CEFC典型破坏模式为局部破坏,内置CFFT可较好延缓构件整体破坏。CEFC在轴压和偏压作用下延性都有所提高,且在偏压作用下CEFC具有明显的二阶刚度,且承载力具有小幅度提高。

关键词: 复材管, 局部约束, 组合柱, 延性, 破坏模式

Abstract: A novel column named concrete-encased FRP confined concrete sub-columns/cores column (CEFC) consisting of steel rebar, concrete and fiber-reinforced polymer (FRP) tube is presented. The sectional form of CEFC consists of the outer common reinforced columns (RC) and 4 inner Concrete-Filled FRP Tubes (CFFT), which located near 4 corners of square CEFC. The compression performance of RC and CEFC were studied and compared through experiment and Finite Element Method (FEM). The result indicates that the typical failure mode of CEFC with weak confine was local crushing and overall damage of CEFC was prevented by CFFT. What′s more, ductility of CEFC was improved. Moreover, second order stiffness and enhancement of strength were observed when CEFC was under eccentric compression.

Key words: FRP tube, FRP confined concrete cores column, composites columns, ductility, failure mode

中图分类号:

TB332

孙运楼, 齐玉军, 刘伟庆. 内置复材管局部弱约束混凝土方柱受压性能研究[J]. 玻璃钢/复合材料, 2016, 0(9): 17-25.

SUN Yun-lou, QI Yu-jun, LIU Wei-qing. EXPERIMANTAL STUDY ON COMPRESSION PERFORMANCE OF CONCRETE-ENCASED FRP CONFINED CONCRETE SUB-COLUMNS/CORES COLUMNS WITH WEAK CONFINE[J]. Fiber Reinforced Plastics/Composites, 2016, 0(9): 17-25.

参考文献

[1] Saafi, M., Toutanji, H. A., et al. Behavior of concrete columns confined with fiber reinforced polymer tubes[J]. ACI Materials Journal, 1999, 96(4): 500-509.
[2] Ozbakkaloglu T., Deric J. Oehlers. Concrete-Filled Square and Rectangular FRP Tubes under Axial Compression[J]. Journal of Composites for Construction, 2008, 12: 469-477.
[3] 张素梅, 刘界鹏, 马乐, 等. 圆钢管约束高强混凝土轴压短柱的试验研究与承载力分析[J]. 土木工程学报, 2007, 40(3): 24-31.
[4] 周绪红, 刘界鹏, 张素梅, 等. 圆钢管约束钢筋混凝土短柱的轴压力学性能[J]. 工程力学, 2009, 26(11): 53-59.
[5] Teng J. G., Huang Y. L., Lam L.. Theoretical Model for Fiber-Reinforced Polymer-Confined Concrete[J]. Journal of Composites for Construction, 2007, 11: 201-210.
[6] 刘兰, 卢亦炎. FRP与钢管混凝土复合柱基本力学性能研究[M]. 湖北: 武汉大学, 2009.
[7] Lam L., Teng J. G.. Design-oriented stress-strain model for FRP-confined concrete in rectangular columns[J]. Journal of reinforced plastics and composites, 2003, 22(13): 1149-1185.
[8] 陆新征, 冯鹏, 叶列平. FRP布约束混凝土方柱轴心受压性能的有限元分析[J]. 土木工程学报, 2003, 36(2): 46-51.
[9] 滕景光, 陈建飞, 史密斯 S. T.. FRP加固混凝土结构[M]. 北京:中国建筑工业出版社, 2005.
[10] 齐玉军, 孙运楼, 刘伟庆, 等. 一种内置FRP局部约束混凝土组合构件:CN201520684334.5[P]. 2015.
[11] L. Lam, Teng J. G.. Design-Oriented Stress-Strain Model for FRP-Confined Concrete[J]. Construction and Building Materials, 2003, 17:471-489.
[12] Mirmiran A., Shahawy M., Samaan M.. Effect of column parameters on FRP-confined concrete[J]. Journal of Composites for Construction, 1998, 2(4):175-185.
[13] 混凝土结构设计规范: GB/T 50010—2010[S]. 北京:中国建筑工业出版社, 2010.
[14] Standard test method for apparent hoop tensile strength of plastic or reinforced plastic pipe by split disk method: ASTM D 2290-2012[S]. American: American Society for Testing for Testing and Materials, 2010.
[15] Standard test method for compressive properties of rigid plastics: ASTM D 695-2010[S]. American: American Society for Testing for Testing and Materials, 2012.
[16] Standard test method for tensile properties of polymer matrix composite materials: ASTM D 3039-2000[S]. American: American Society for Testing for Testing and Materials, 2000.
[17] 钢筋混凝土用钢测试方法: GB/T 28900—2012[S]. 北京: 中国建筑工业出版社, 2012.
[18] 鲁国昌, 叶列平. FRP管约束混凝土轴压性能研究[D]. 北京:清华大学, 2005.
[19] Ida Bagus Rai Widiarsa, Muhammad N.S. Hadi. Performance of CFRP wrapped square reinforced concrete columns subjected to eccentric loading [J]. Procedia Engineering, 2013, 54: 365-376.
[20] T. Yu, Teng J.G., Wong Y.L.. Finite element modeling of confined concrete-I: Drucker-Prager type plasticity model[J]. Engineering Structures, 2010, 32: 665-679.