科研之友
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摘要
The variable amplitude loading is different from constant amplitude loading on fatigue performance.The CFL strengthened RC beams were researched experimentally by MTS system, and combined with the load spectrum with 3 amplitude levels originated from the actual service loading conditions of the bridge.The △Se-N curves were obtained by analyzing the fatigue testing results, and the limited fatigue load is established as about 25.2kN.The fatigue life is shorter and the limited fatigue load is obviously lower under variable amplitude loading compared with that under constant amplitude loading.
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