|Table of Contents|

[1] Sun Zeyang, Wu Gang, Wang Yanhua, Wu Zhishen, et al. Experimental study on concrete columns hybrid reinforcedby steel and FRP bars under seismic loading [J]. Journal of Southeast University (English Edition), 2016, 32 (4): 439-444. [doi:10.3969/j.issn.1003-7985.2016.04.008]
Copy

Experimental study on concrete columns hybrid reinforcedby steel and FRP bars under seismic loading()
地震作用下钢-FRP复合配筋混凝土柱试验研究
Share：

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
32
Issue:
2016 4
Page:
439-444
Research Field:
Civil Engineering
Publishing date:
2016-12-20

Info

Title:
Experimental study on concrete columns hybrid reinforcedby steel and FRP bars under seismic loading
地震作用下钢-FRP复合配筋混凝土柱试验研究
Author(s):
Sun Zeyang1;  Wu Gang1;  Wang Yanhua1;  Wu Zhishen1;  2
1Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
2International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, China
孙泽阳1;  吴刚1;  王燕华1;  吴智深1;  2
1东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096; 2东南大学城市工程科学技术研究院, 南京 210096
Keywords:
concrete column;  shaking table test;  hybrid reinforcement;  peak ground acceleration;  strain distribution
混凝土柱;  振动台试验;  混杂配筋;  峰值加速度;  应变分布
PACS:
TU375.3
DOI:
10.3969/j.issn.1003-7985.2016.04.008
Abstract:
In order to study the dynamic behavior of hybrid reinforced concrete columns, shaking table tests of three concrete columns with equal initial stiffness were conducted. The longitudinal reinforcements include an ordinary steel bar, a steel-fiber reinforced polymer(FRP)composite bar(SFCB), and hybrid reinforcement(steel bar and FRP bar, C-H). Test results show that the peak ground acceleration(PGA)responses of different columns are similar to each other. For an ordinary reinforced concrete(RC)column, the plastic strain of the steel bar develops rapidly after the PGA of the input ground motion reaches 100 cm/s2, and the corresponding residual strain develops dramatically. For a SFCB column, even after the peak strain reaches 0.015, the residual strain is below 5×10-4. For the hybrid column C-H, the residual strain of the FRP bar is similar to that of the SFCB column. In general, concrete columns with hybrid steel and FRP bar reinforcement can achieve smaller residual deformation, and the SFCB reinforced columns can be constructed in extreme environments, such as offshore bridges, due to good anti-corrosion performance.
为了研究复合配筋混凝土柱的动力响应性能特征, 进行了等初始刚度的普通钢筋混凝土(RC)柱、钢-连续纤维(FRP)复合筋(SFCB)混凝土柱和混杂配筋混凝土柱(钢筋/FRP筋, C-H)振动台试验.研究结果表明, 不同配筋混凝土柱的加速度峰值响应差别不大;RC柱在柱台输入波峰值加速度达到100 cm/s2之后, 塑性铰区钢筋塑性应变快速发展, 且有较大震后残余应变;SFCB柱在纵筋峰值应变达到0.015时, 相应残余应变依然在5×10-4以下;C-H柱具有和SFCB柱类似的残余应变较小的优势.总体而言, 在普通环境下混杂配筋柱可以实现较小的震后残余应变, 而SFCB混凝土柱具有较高的震后可修复性(较小残余位移)的同时, 可以在海洋等恶劣环境下具有高耐久性.

References:

[1] Bruneau M, Reinhorn A. Overview of the resilience concept[C]//Proceedings of the 8th US National Conference on Earthquake Engineering. San Francisco, CA, USA, 2006:2040-1-2040-9.
[2] Priestley M J N. Performance based seismic design[J]. Bulletin of the New Zealand Society for Earthquake Engineering, 2000, 33(3): 325-346.
[3] Ye L P, Lu X Z, Ma Q L, et al. Influence of post-yielding stiffness to seismic response of building structures[J]. Journal of Building Structures, 2009, 30(2), 17-29.(in Chinese)
[4] Wu G, Wu Z S, Luo Y B, et al. A new reinforcement material of steel fiber composite bar(SFCB)and its mechanics properties[C/CD]//Proceedings of 9th International Symposium on Fiber Reinforced Polymer Reinforcement for Concrete Structures. Adelaide, Australia, 2009:00209-1-00209-4.
[5] Wu G, Wu Z S, Luo Y B, et al. Mechanical properties of steel-FRP composite bar under uniaxial and cyclic tensile loads[J]. Journal of Materials in Civil Engineering, 2010, 22(10): 1056-1066. DOI:10.1061/(asce)mt.1943-5533.0000110.
[6] Sun Z Y, Yang Y, Qin W H, et al. Experimental study on flexural behavior of concrete beams reinforced by steel-fiber reinforced polymer composite bars[J]. Journal of Reinforced Plastics and Composites, 2012, 31(24): 1737-1745. DOI:10.1177/0731684412456446.
[7] Sun Z Y, Wu G, Wu Z S, et al. Seismic behavior of concrete columns reinforced by steel-FRP composite bars[J]. Journal of Composites for Construction, 2011, 15(5): 696-706. DOI:10.1061/(asce)cc.1943-5614.0000199.
[8] Ibrahim A I, Wu G, Sun Z Y. Experimental study of the cyclic behavior of concrete bridge columns reinforced by steel-basalt fiber composite bars and hybrid stirrups[J/OL]. Journal of Composites for Construction, (2016-08-17)[2016-10-09].http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0000742.
[9] Li J, Gong J. Seismic strengthening of reinforced concrete columns damaged by rebar corrosion using combined CFRP and steel jacket[J]. Journal of Southeast University(English Edition), 2009, 25(4): 506-512.
[10] Motaref S, Saiidi M S, Sanders D. Shake table studies of energy-dissipating segmental bridge columns[J]. Journal of Bridge Engineering, 2014, 19(2): 186-199. DOI:10.1061/(asce)be.1943-5592.0000518.
[11] Sun Z Y, Wu G, Wu Z S, et al. Nonlinear behavior and simulation of concrete columns reinforced by steel-FRP composite bars[J]. Journal of Bridge Engineering, 2014, 19(2): 220-234. DOI:10.1061/(asce)be.1943-5592.0000515.

Memo

Memo:
Biographies: Sun Zeyang(1984—), male, doctor; Wu Gang(corresponding author), male, doctor, professor, g.wu@seu.edu.cn.
Foundation items: The National Key Technology R& D Program of China(No.2014BAK11B04), the National Natural Science Foundation of China(No.51528802, 51408126), the Natural Science Foundation of Jiangsu Province(No.BK20140631).
Citation: Sun Zeyang, Wu Gang, Wang Yanhua, et al.Experimental study on concrete columns hybrid reinforced by steel and FRP bars under seismic loading[J].Journal of Southeast University(English Edition), 2016, 32(4):439-444.DOI:10.3969/j.issn.1003-7985.2016.04.008.
Last Update: 2016-12-20