摘要
无梁板是房屋建筑中常用的结构形式之一。预应力的采用极大地改善了此结构的性能。它使板中的裂缝和变形得到控制,结构的截面尺寸减小,从而导致了高层建筑高度的减小和基础上荷载的降低。目前在预应力混凝土无梁板设计中,通常按荷载平衡法,根据所需平衡的荷载总量计算出预应力筋的数量。而对预应力筋的布置,各国规范的建议并不完全一致。大量试验表明,预应力混凝土无梁板的承载能力主要取决于板内所配钢筋的总量,与预应力的布置形式关系较小。这一点也为文[3]中的试验所证实。但预应力筋的布置形式与板弹性性能的关系尚值得进一步探讨。本文基于荷载平衡法和有限元法。
The behaviours of prestressed concrete flat slabs with tendons uniformly distributed in both directions or uniformly distributed in one direction and concentrated within slab strips over columns in the other direction or concentrated within slab strips over columns in both directions are calculated by using finite element method and load balancing method. On the basis of the calulated results and the existing test data, the advantages and disadvantages of the above tendon arrangements are discussed. It is suggested that the form with concentrating tendons within slab strips over columns is the best one.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1991年第4期136-139,共4页
Journal of Southeast University：Natural Science Edition
关键词
预应力混凝土
无梁板
配筋
reinforced concrete
slab
finite element method
load balancing method
