[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]

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Experimental study on concrete columns hybrid reinforcedby steel and FRP bars under seismic loading()

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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

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

Keywords:

concrete column;  shaking table test;  hybrid reinforcement;  peak ground acceleration;  strain distribution

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.

References:

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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.

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