建筑结构学报2011，Vol.32Issue(2)：1-9,9.
钢板-混凝土组合受弯加固梁疲劳性能试验研究
Experimental research on fatigue behavior of RC beams strengthened by steel plate-concrete composite technique
摘要
Abstract
Based on fatigue experiments on eight RC beams strengthened by steel plate-concrete composite (SPCC) technique, fatigue life and variation trend of strain under constant amplitude fatigue loading were studied.The experimental results show that the fatigue failure mode of steel plate-concrete composite beam is fatigue failure of the steel plates.The initial fatigue crack in steel plates appears near the welded toe of stud and then expansion though.But different from general RC beams, the fatigue failure mode of specimens is ductile.Amplitude of stress in steel plate has most important influence on fatigue behavior of RC beams strengthened by SPCC technique.Level and amplitude of stress in steel plate should be controlled strictly in practical design and high strength steel and thin steel plate are not suitable for RC beams strengthened by SPCC technique.The pre-stress in steel plate can improve fatigue life of RC beams strengthened by SPCC technique.The S-N relation for tension steel plate welded with studs provided in ' Code for railway steel bridges design' is safe enough for the design of steel plates in RC beams strengthened by SPCC technique.The calculational method for fatigue life is proposed considering effects of stress level and stress amplitude.关键词
钢板-混凝土组合梁/加固/疲劳试验/疲劳性能分类
建筑与水利引用本文复制引用
聂建国,王宇航..钢板-混凝土组合受弯加固梁疲劳性能试验研究[J].建筑结构学报,2011,32(2):1-9,9.基金项目
国家自然科学基金项目(50578084),铁道部科技研究开发计划项目(2006G029). （50578084）
