Deformation and Residual Load of Reinforced Lightweight Concrete Beam under High-Cycle Fatigue

• Main Authors: Feng-Hsiung Chiu, 邱豐雄
• Other Authors: 張明添
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/15573003958666291974

碩士 === 國立中興大學 === 土木工程學系所 === 97 === In this research, the decay of integrity of lightweight concrete (LWC) beams subjected to fatigue loading, such as mid-span deflections, steel strain of rebars and residual loads prior to failure were investigated. Results were also compared to those of corresponding normal weight concrete (NWC) beams. Four different maximum loads (Pmax=22.84, 19.98, 17.13 and 14.27 kN) were implemented to the specimens with a constant load ratio equal to 0.57 and the load frequency is 2 Hz. If necessary, static tests were carried to investigate their residual behavior. Experiment results showed that stiffness and elastic-inelastic behavior of LWC beams decay closely relates to the maximum magnitude of cyclic load. The fatigue damage of LWC beams was found to be smaller than that of NWC beams.