摘要
本文根据30片部分预应力混凝土(PPC)约束箱梁(其中9片为无箍筋梁,21片为有箍筋梁)的抗剪试验,分析了约束箱梁的剪力破坏的特征;研究了弯矩比n、剪跨比m、配箍率P_(sv)及平均预应力度λ等主要参数对抗剪强度的影响;提出了PPC约束箱梁抗剪强度的计算公式,经与收集到的国内外49片约束梁、连续梁试验数据的验证,证明建议公式是可靠的,可供连续梁、约束梁设计和修改桥梁设计规范时参考。
Based on the test results of 30 restrained PPC box girders(9 without stir-rups and 21 with stirrups ) the characteristics of shear failure of these girdersare described, and the effects of moment ratio(n), shear-span ratio(m), webreinforcement ratio (ρ_(sv)) and average degree of prestressing (λ) on the shearstrength of such girders are also analysed. Verified by 49 test data of restrainedand continuous girders available from home and abroad, the formula pre-sented for calculating shear strength is reliable and it may be of value indesigning and revising the 《China Railway Bridge Code》.
出处
《土木工程学报》
EI
CSCD
北大核心
1992年第1期21-28,共8页
China Civil Engineering Journal
