|Table of Contents|

Experiment on Seismic Performance of CFRP Reinforced Concrete Column with MRD(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年04期
Page:
23-31
Research Field:
Publishing date:

Info

Title:
Experiment on Seismic Performance of CFRP Reinforced Concrete Column with MRD
Author(s):
ZHAO Jun1;  WANG Pei-pei1;  FENG Yi-bo1;  ZHANG Xiang-cheng2;  RUAN Xiao-hui2
(1. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China; 2. School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China)
Keywords:
CFRP bar;  concrete column;  MRD;  current;  seismic performance;  self-centering
PACS:
TU398
DOI:
10.19815/j.jace.2019.10019
Abstract:
In order to study the effect of magnetorheological damper(MRD)on seismic performance of concrete columns reinforced with carbon fiber reinforced plastics(CFRP), a low-cycle and reverse horizontal loading test was completed for one ordinary reinforced concrete column and two CFRP reinforced concrete columns with MRD, the currents of MRD were 150 mA and 80 mA, respectively. The influence of MRD with different currents for the CFRP reinforced concrete columns on the failure modes, hysteretic curves, skeleton curves, stiffness degradation, energy dissipation capacity, residual deformation and the performance differences between reinforced concrete column and CFRP reinforced concrete column with MRD were studied. The results show that compared with reinforced concrete column, CFRP reinforced concrete columns with MRD have relatively dispersed cracks and a higher development height, the ultimate deformation increases, the hysteretic curve is fuller, the bearing capacity is higher and the energy dissipation capacity is significantly improved, the energy dissipation coefficient is increased by 104.9%, moreover the residual displacement is greatly reduced in the reasonable way, up to 76.66% reduction, satisfactory self-centering capacity is shown. Simultaneously, the current of MRD has a great influence on the performance of CFRP reinforced concrete columns. Compared with the concrete column equipped with the MRD of 80 mA, the 150 mA MRD concrete column has higher bearing capacity and energy dissipation capacity, the energy dissipation coefficient is increased by 28.61% and its stiffness is always greater during loading, the initial stiffness is greater. The failure mode of concrete columns with MRD under different currents is the same, and the influence of MRD on the residual deformation is less in this way.

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Last Update: 2020-07-29