无粘结预应力双向板变形计算方法研究  

Research on calculation method of unbonded prestressed dual concrete slabs deformation

作　　者：宋永发[1] 王清湘[1] 宋玉普[1] 邴晓[1] 张保和[1] 

机构地区：[1]大连理工大学土木建筑学院,辽宁大连116024

出　　处：《大连理工大学学报》2001年第5期617-620,共4页Journal of Dalian University of Technology

基　　金：海岸和近海工程国家重点实验室基金资助项目 ( LP970 7)

摘　　要：通过 6块无粘结预应力双向板试验 ,研究了影响双向板变形的主要因素 :结构形式、预应力筋配筋率 .将边梁对简支板跨中最大挠度的影响转化为荷载与支座条件系数来考虑 ;对两个方向的预应力筋和非预应力筋对简支板跨中最大挠度的影响 ,用换算配筋率 (αpρ)参数来反映 ,建立了无粘结预应力简支板短期刚度和变形计算公式 .计算结果与试验结果吻合较好 .Based on the experimental results of 6 unbonded prestressed dual concrete slabs, the effects of structural forms, prestressed reinforcement ratio upon the prestress increment and the ultimate strength capacity are studied. The effects of surrounding beams upon the maximum deflection in the mid span of simply supported concrete slabs are considered with loading and the supporting condition factors. The effects of prestressed and nonprestressed reinforcement in two directions upon the maximum deflection in the mid span of simply supported concrete slabs are reflected with the ratio of the conversion reinforcement ratio. The stiffness formula of unbonded prestressed simply supported concrete slabs is formed. The experimental results agree well with the calculated results.

关 键 词：预应力双向板 刚度 变形 无粘结 预应力混凝土结构 结构形式 预应力筋配筋率 

分 类 号：TU378.5[建筑科学—结构工程]