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Retrofitting Seismically Damaged Steel sections encased Concrete Composite Walls using Externally Bonded CFRP Strips

Sun, F-J., Pang, S-H., Zhang, Z-W. , Fu, F. ORCID: 0000-0002-9176-8159 & Qian, K. (2020). Retrofitting Seismically Damaged Steel sections encased Concrete Composite Walls using Externally Bonded CFRP Strips. Composite Structures, 236, article number 111927. doi: 10.1016/j.compstruct.2020.111927


Concrete shear wall encased with steel sections were widely used in high rise buildings due to its high lateral strength, ductility and energy dissipation capacity. However, to date, little studies were conducted on repairment of seismically damaged steel-concrete composite (SCC) walls to recover their lateral load resisting capacity. Thus, the efficiency of Carbon Fiber Reinforced Polymers (CFRP) strips to retrofit SCC walls after earthquake was unclear. For this purpose, four SCC walls were first tested to failure under cyclic lateral loads and thereafter repaired and re-tested. The first crack load, crack pattern, yield load, and peak load of tested specimens were measured and compared. It was found that replacing buckled rebar and applying proper CFRP repairing scheme could recover the seismic resistance of damaged SCC walls . However, if purely rely on CFRP repairing schemes without replacing of the buckled rebar, the yield load, peak load, and initial stiffness could not be properly recovered. However, as long as CFRP repairing schemes applied, the degradation of strength and stiffness of repaired specimens was slower than that of counterpart without retrofitting , which resulted in enhancement of relatively larger drift ratio.

Publication Type: Article
Additional Information: © Elsevier 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Publisher Keywords: Steel-concrete composite, Structural wall, Seismic, CFRP, Repair
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
SWORD Depositor:
[thumbnail of 2020-1-CS- Strengthening Damaged Steel-Concrete composite walls-City deposit.pdf]
Text - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

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