跨中集中荷载下部分预应力梁无粘结筋极限应力的研究  

Ultimate Stress in Unbonded Tendons of Partially Prestressed Concrete Beams Under Mid-Span Loading

作　　者：王逸[1] 杜拱辰[1] 刘永颐[1] 

机构地区：[1]中国建筑科学研究院

出　　处：《建筑结构学报》1991年第6期42-52,共11页Journal of Building Structures

摘　　要：本文通过十八根梁的试验,研究跨中集中倚载作用下无粘结部分预应力梁的性能以及跨高比对无粘结筋极限应力的影响,得出跨中集中荷载下无粘结筋极限应力随跨高比增大而降低的结论,并提出无粘结筋极限应力的计算公式。This paper studies the unbonded tendons in partially prestressed concrete beams subjected to a concentrated load at mid-span. Eighteen beams were tested. Test results show that the span-depth ratio has significant effect on the ultimate stress of unbonded tendons under mid-span loading. Ultimate stress decreases as span-depth ratio increases. An empirical equation was proposed to estimate the ultimate stress in unbonded tendons.

关 键 词：预应力 梁 无粘结钢筋 承载力 

分 类 号：TU378.202[建筑科学—结构工程]