摘要
在普通混凝土浇筑的腹板上采用二次浇注再生混凝土翼缘制成叠合梁并进行抗弯承载力试验,对比分析了各叠合梁的抗弯性能、变形特性及其极限破坏形态。试验结果表明,平截面假定理论依然成立;随着再生骨料取代率的提高,梁挠曲变形增加的速率有所提高,但跨中极限挠度值相差不大;梁的抗裂性能略有降低;再生骨料的取代率差异对叠合梁的抗弯极限承载力及极限破坏形态影响不显著。
The flexural behavior of composite beams made of ordinary and recycled concrete is comparatively analyzed. The results show the theory of plane assumption is still valid; with the increase of displacement ratio of recycled aggregates, the growing ratio of the deflection of composite beams is moderately improved, but the ultimate deflection of mid.span of composite beams is similar; the crack resistance of beams is slightly lowered; the influence of different replacement ratio of recycled aggregates on the flexural bearing capacity and ultimate damage mode of composite beams is not significant.
出处
《混凝土与水泥制品》
北大核心
2014年第5期25-29,共5页
China Concrete and Cement Products
基金
国家自然科学基金资助项目(51368014)
广西研究生教育创新计划资助项目(2010105960814M01)
广西矿冶与环境科学实验中心重点项目(KH2013ZD005)
关键词
叠合梁
再生混凝土
取代率
抗弯性能
极限破坏
Composite beam
Recycled concrete
Replacement ratio
Flexural performance
Ultimate damage
