Strain coordination of quasi-plane-hypothesis for reinforced concrete beam strengthened by epoxy-bon

• 作 者: 曾宪桃 丁亚红 王兴国
• 机 构: The Third Engineer Scientific Research Institute of the Headquarters of the General Staff,Dept. of C
• 出 处: Journal of Harbin Institute of Technology
• 发表日期: 2004年期
• 关键词: epoxy hypothesis reinforced Strain GFRP strengthened bonded ultimate quasi defle

The testing of thirteen reinforced concrete (RC) beams strengthened by epoxy-bonded glass fiber reinforced plastic plate (GFRP) shows that the RC beam and the GFRP plate with epoxy bonding on it can work fairly well in coordination to each other. But there is relative slipping between RC beam and GFRP plate. And the strain of GFRP and steel rebar of RC beam satisfies the quasi-plane-hypothesis, that is, the strain of longitudinal fiber that parallels to the neutral axis of plated beam within the scope of effective height (h_0) of the cross section is in direct proportion to the distance from the fiber to the neutral axis. The strain of GFRP and steel rebar satisfies the equation: ε_ GFRP =Kε_ steel .

The testing of thirteen reinforced concrete (RC) beams strengthened by epoxy-bonded glass fiber reinforced plastic plate (GFRP) shows that the RC beam and the GFRP plate with epoxy bonding on it can work fairly well in coordination to each other. But there is The slipping between RC beam and GFRP plate. And the strain of GFRP and steel rebar of RC beam is the quasi-plane-hypothesis, that is, the strain of longitudinal fiber that parallels to the neutral axis of plated beam within the scope of effective height (h_0) of the cross section is in direct proportion to the distance from the fiber to the neutral axis. The strain of GFRP and steel rebar satisfies the equation: ε_GFRP = Kε_steel.