Experimental study on seismic performance of CFRP retrofitted RC beam-slab-column interior joints

被引：0
|
作者：
Wang Z. [1 ,2 ]
Ma C. [1 ,2 ]
Qiao X. [3 ]
Wang D. [1 ,2 ]
机构：
[1] Key Lab of Structures Dynamic Behavior and Control, Harbin Institute of Technology, Ministry of Education, Harbin
[2] School of Civil Engineering, Harbin Institute of Technology, Harbin
[3] CCTEG Shenyang Engineering Company, Shenyang
来源：
| 1600年 / Science Press卷 / 37期
关键词：
CFRP; Interior joint; Quasi-static test; Reinforced concrete frame; Retrofitting; Seismic behavior;
D O I：
10.14006/j.jzjgxb.2016.05.026
中图分类号：
学科分类号：
摘要：
The full-scale RC interior beam-column joints with slab and orthogonal beams, namely with real boundary conditions, were designed and tested under reversed cyclic lateral loading. The effects of the columns and beams strengthened by CFRP on the seismic performance and failure modes of the beam-slab-column joint were investigated. The failure modes, hysteretic behavior, envelope curves, energy dissipation, displacement ductility, stiffness degradation and joint shear deformation were investigated and compared in detail. The test results show that the failure mode of the control interior joint is the column-hinging mechanism of strong-beam-weak-column due to the presence of slab and orthogonal beams. After the retrofitting at columns or both columns and beams with CFRP wraps, the average peak load capacities basically do not increase but the ductility and energy dissipation of joints are effectively improved. The failure modes of retrofitted joints are transformed from column-hinging mechanism to beam-hinging mechanism of strong-column-weak-beam. The retrofitting at columns only is a more effective scheme. Due to the presence of orthogonal beams, the joint core regions do not appear obvious shear damages even at large drift ratios. © 2016, Editorial Office of Journal of Building Structures. All right reserved.
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页码：226 / 232
页数：6
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