【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。更多还原

【Abstract】 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.更多还原