摘要
通过 1 1根无粘结部分预应力高强混凝土梁 ,研究了影响裂缝闭合的主要因素 :预应力筋配筋率、非预应力筋配筋率、跨高比、荷载作用方式 .用无粘结配筋指标βpe 和换算配筋率αpρ这两个参数来反映对裂缝闭合弯矩的影响 ,应用名义拉应力建立了闭合弯矩计算公式 ;计算结果与试验结果吻合较好 .
Based on the experimental results of 11 unbonded partially prestressed concrete (PPC) beams with high strength concrete, the major factors which affect the closed bending moments of unbonded beams are studied.The effect of prestressed and non prestressed reinforcement on deflection in the mid span of unbonded beams and loading behavior is reflected with the ratio of unbonded reinforcement index to composite reinforcement index and the conversion reinforcement ratio. The formula of closed bending moments is obtained based on the nominal tension stress. The calculated results agree well with the experimental results.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2000年第3期348-350,共3页
Journal of Dalian University of Technology
基金
海岸及近海工程国家重点实验室基金资助项目
