Experimental Study of Impaired Reinforced Concrete Beams Strengthening with Externally Steel Frame
A large impaired reinforced concrete beam with cracks was strengthened under self-weight action by the externally bonded steel frame composed with bottom steel plate and side hoop steel belts. The normal service loading behaviors of this beam were tested to verify the effectiveness of this strengthening method specified in current Chinese design code. Based on the analyses of test results, it can be concluded that: the deformation of flexural cross section of this beam fitted the assumption of plain cross section, the steel plate could effectively enhance the flexural stiffness and decrease the deflection of this beam, no new cracks appeared under the normal service loads, the cracks at bottom of this beam were more confined by the steel frame than those at web zone. Therefore, other measure should be taken to avoid the opening of web cracks.
impaired reinforced concrete beam externally bonded steel frame strengthening twice loading deflection crack width flexural behavior
Fenglan Li Xionghuai Yu Cheng Chen Song Chen
School of Civil Engineering and Communications North China University of Water Conservancy and Elect School of Civil Engineering and Communications North China University of Water Conservancy and Elect
国际会议
三峡
英文
2393-2396
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）