Tests for aseismic performance of CFRP-reinforced high toughness cement matrix composite columns
YAO Weilai1, JIANG Shiyong1,2,FEI Wei2, LI Xueyang3
1. Department of Military Facility, Army Logistics University of PLA, Chongqing 401311, China;
2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 4000741, China;
3. Unit 93212 of PLA, Dalian 116200, China
Abstract：In order to study the seismic behavior of CFRP reinforced high toughness cementitious composite columns, three short columns with shear span ratio of 3 and three long columns with shear span ratio of 5 were designed and subjected to horizontal cyclic loading test under three kinds of axial compression ratios, the failure pattern was studied, and the seismic performance was analyzed through stiffness degradation, energy dissipation and comprehensive performance index. The research shows that the specimens generated a large number of horizontal cracks in the failure process, and there is no phenomenon of cracking and peeling of high toughness cementitious composite, which shows a higher damage tolerance compared with the conventional reinforced concrete columns. For the CFRP reinforced high toughness cementitious composite columns with shear span ratio of 3 and 5, the greater the shear span ratio or the axial compression ratio, the better the seismic performance in the test axial compression ratio of 0.2~0.5.
[1] Eduardo B P, Gregor F, Joaquim. Direct assessment of tensile stress-crack opening behavior of strain hardening cementitious composites (SHCC) [J]. Cement Concrete Research, 2012, 42(6):834-846.
[2] Li V C. Engineered cementitious composites-tailored composites through micromechanical modeling [J]. Fiber Reinforced Concrete, 1998, 78(1): 64-87.
[3] Li V C, Wang S, Wu C. Tensile strain-hardening behavior of polyvinyl alcohol engineered cementitious composite(PVA-ECC) [J]. ACI Materials Journal, 2001, 98(6):483-492.
[4] Kamile Tosun-Felekoglu, Burak Felekoglu, Ravi Ranade, et al. The role of flaw size and fiber distribution on tensile ductility of PVA-ECC[J]. Composites: Part B, 2014(56): 536-545.
[5] 潘钻峰, 汪卫, 孟少平, 乔治. 混杂聚乙烯醇纤维增强水泥基复合材料力学性能[J]. 同济大学学报自然科学版, 2015, 43(1):33-40.
PAN Zuanfeng, WANG Wei, MENG Shaoping, et al. Study on mechanical properties of hybrid PVA fibers reinforced cementitious composites [J]. Journal of Tongji University(Natural Science), 2015, 43(1):33-40.
[6] Li Q, Xu S. Experimental research on mechanical performance of hybrid fiber reinforced cementitious composites with polyvinyl alcohol short fiber and carbon textile[J]. Journal of Composite Materials, 2011, 45(1):5-28.
[7] 张旭. 高轴压比PVA-ECC柱抗震性能研究[D]. 湖南大学, 2016.
ZHANG Xu. Study on seismic behavior of PVA-ECC columns with high axial compression ratio [D]. Hunan University, 2016.
[8] 邓明科, 张辉, 梁兴文,等. 高延性纤维混凝土短柱抗震性能试验研究[J]. 建筑结构学报, 2015, 36(12):62-69.
DENG Mingke, ZHANG Hui, LIANG Xingwen. Experimental study on seismic behavior of high ductile fiber reinforced concrete short column [J]. Journal of Building Structures, 2015, 36(12):62-69.
[9] 赵永生, 王嘉伟, 俞家欢, 李春雨. FRP筋增强PPECC轴压柱试验研究[J]. 混凝土与水泥制品, 2013(05):41-45.
ZHAO Yongsheng, WANG Jiawei, YU Jiahuan, et al. Experimental research on FRP reinforced PPECC axial compression column [J]. China Concrete and Cement Products, 2013(5):41-45.
[10] Li V C, Wang S. Flexural behaviors of glass fiber-reinforced polymer (GFRP) reinforced engineered cementitious composite beams[J]. ACI Materials Journal, 2002, 99(1):11-21.
[11] Fischer G, Li V C. Deformation behavior of fiber-reinforced polymer reinforced engineered cementitious composite (ECC) flexural members under reversed cyclic loading conditions[J]. ACI Structural Journal, 2003, 100(1):25-35.
[12] 中华人民共和国国家标准. 建筑抗震设计规范(GB 50011-2010)[S]. 中国建筑工业出版社, 2010.
National Standards of the People's Republic of China. Code for seismic design of buildings (GB 50011-2010) [S]. China Building Industry Press, 2010.
[13] 中华人民共和国国家标准. 普通混凝土力学性能试验方法标准(GB/T 50081-2002)[S]. 中国建筑工业出版社, 2003.
National Standards of the People's Republic of China. Standard for Test Method of Mechanical Properties of Ordinary Concrete (GB/T 50081-2002) [S]. China Building Industry Press, 2003.
[14] 龚永智, 张继文, 蒋丽忠,等. 高性能CFRP筋混凝土柱的抗震性能[J]. 中南大学学报(自然科学版), 2010, 41(4):1506-1513.
GONG Yongzhi, ZHANG Jiwen, JIANG Lizhong,et al. A seismic behavior of concrete columns reinforced with CFRP [J]. Journal of Central South University, 2010, 41(4):1506-1513.
[15] 赵鹏展. GFRP管混凝土柱-钢筋混凝土梁节点抗震性能研究[D]. 大连理工大学, 2010.
ZHAO Zhanpeng. Study on seismic behavior of GFRP pipe concrete column-reinforced concrete beam joints [D]. Dalian University of Technology, 2010.
[16] 冯鹏, 叶列平, 黄羽立. 受弯构件的变形性与新的性能指标的研究[J]. 工程力学, 2005, 22(6):28-36.
FENG Peng, YE Lieping, HUANG Yuli. Deformability and new performance indices of flexural members [J]. Engineering mechanics, 2005, 22(6):28-36.
[17] 龚永智. 高性能CFRP筋增强混凝土柱受压及抗震性能的研究[D]. 东南大学, 2007.
GONG Yongzhi. Study on compression and seismic behavior of high performance CFRP reinforced concrete columns [D]. Southeast University, 2007.
[18] Mufti A A, Newhook J P, Tadros G. Deformability versus ductility in concrete beams with FRP reinforcement [C]. Proceedings of the 2nd International Conference on Advanced Composite Materials in Bridges and Structures, ACMBS-II, Montreal, 1996.
[19] 李贺东, 徐世烺. 超高韧性水泥基复合材料弯曲性能及韧性评价方法[J]. 土木工程学报, 2010, 43(3):32-39.
LI Hedong, XU Shilang. Research on flexural properties and flexural toughness evaluation method of ultra-high toughness cementitious composites [J]. China Civil Engineering Journal, 2010, 43(3):32-39.
[20] 蔡向荣. 超高韧性水泥基复合材料基本力学性能和应变硬化过程理论分析[D]. 大连理工大学, 2010.
CAI Xiangrong. Theoretical analysis of basic mechanical properties and strain hardening process of ultra-high toughness cement-based composites [D]. Dalian University of Technology, 2010.
