Confinement effect of CFRP and steel ties in circular RC columns 30 MPa concrete strength
Date of Publication
2006
Document Type
Bachelor's Thesis
Degree Name
Bachelor of Science in Civil Engineering
College
Gokongwei College of Engineering
Department/Unit
Civil Engineering
Thesis Adviser
Jason Maximino C. Ongpeng
Defense Panel Member
Andres Winston C. Oreta
Ronald S. Gallardo
Mary Ann Q. Adajar
Abstract/Summary
In today's technology, the methods of confinement are now being used in retrofitting and rehabilitating concrete structures. Through extensive research, Carbon Fiber Reinforced Polymers (CFRP) is slowly being introduced in the construction industry. The used of CFRP is a good material for confining the concrete structures, in addition, its properties also shows remarkable performance due to its resistance to corrosion, flexibility and it is lightweight.
Circular RC columns with 180 mm diameter and height of 500 mm were wrapped with CFRP and were then tested under uniaxial compressive loading until failure. The fibers sheets of the CFRP were oriented 90() with respect to the longitudinal axis in order to provide lateral reinforcement to the RC column. This paper investigated the axial load, axial strain and the lateral strain of the wrapped RC columns and compared it with the plain RC columns.
The most significant increase in strength was seen for the specimens wrapped with 2 layers of CFRP. For specimens having no steel ties the increase in strength is 47%, while the specimens with the 40 mm steel tie spacing achieved an increase of 72% in the ultimate compressive strength. As a result, the increase in compressive strength for a typical reinforced concrete column was greatest when wrapped with 2 layers of CFRP because it increases the load bearing capacity of the column. The research had shown that the use of CFRP increases the ductility of the column as well as the physical properties like aesthetics. Thus, minimizing the amount of maintenance required.
Abstract Format
html
Language
English
Format
Accession Number
TU13543
Shelf Location
Archives, The Learning Commons, 12F, Henry Sy Sr. Hall
Physical Description
ix, 51 leaves : ill. (some col) ; 28 cm.
Keywords
Concrete construction; High strength concrete
Recommended Citation
Cu, A. G., Flores, M. B., & Reyes, F. M. (2006). Confinement effect of CFRP and steel ties in circular RC columns 30 MPa concrete strength. Retrieved from https://animorepository.dlsu.edu.ph/etd_bachelors/7095
