Investigation on Concrete Confined Effectiveness with FRP Bars

• Main Authors: Chia-yuan Liang, 梁家源
• Other Authors: Yung-chih Wang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/19839428581541708897

碩士 === 國立中央大學 === 土木工程研究所 === 97 === What we called “Fiber Reinforced Polymer Bars” is made from carbon or glass fibers mixed with polymer resin to a shape similar to steel reinforcing bars, initial as FRP bars. Nowadays, FRP bars are widely adopted in newly constructed RC structures in many countries. With respect to the highly corrosive environment as Taiwan, FRP bars as reinforcement can be considered to the new or green RC structures for sustaining their service lives. ACI committee 440 has published a new design guideline for FRP concrete members in 2006. However, the content is limited to the specifications on how to design FRP RC beams, such as moment, shear, and bond strength designs. There is no other design guide for RC columns, especially for the confined effectiveness of FRP hoops. Therefore, the research is to investigate the confining effectiveness of RC columns using FRP hoops. Ten short column specimens with rectangular section were manufactured from a local FRP industrial firm. The FRP tie bars are used as the transverse reinforcement instead of steel tie bars to confine the column. The FRP longitudinal reinforcement in some concrete columns is used. The columns were subjected to monotonically axial loading. Deformations of concrete, rebars and tie bars were measured electronically. Main results showed that the compressively carried capacity of FRP rebars cannot be ignored. The GFRP tie bars performed better behavior of confinement than the CFRP tie bars.