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收集整理国内外420根钢筋混凝土矩形截面有腹筋简支梁的剪切试验数据,对《混凝土结构设计规范》(GB 50010—2010)、《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D62—2004)和美国规范ACI 318-11受剪承载力计算模型进行了误差分析,并进一步分析了各规范最小配箍率的合理性。选取其中113根有腹筋梁与同条件无腹筋梁进行比较,得到了箍筋对梁的受剪承载力贡献比例的变化趋势。结果表明,对于集中荷载作用下有腹筋梁受剪承载力,《混凝土结构设计规范》(GB 50010—2010)的计算公式预测值偏高,尤其是配置高强箍筋的普通强度混凝土梁;对于均布荷载作用下有腹筋梁受剪承载力,美国规范ACI 318-11预测结果的误差较小;各规范的最小配箍率取值较合理,能有效地避免梁发生斜拉破坏。
Collecting and analyzing data of 420 shear tests of web reinforced concrete with rectangular webs reinforced with rectangular webs at home and abroad. The “Code for Design of Concrete Structures” (GB 50010-2010), “Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts” (JTG D62 -2004) and the American standard ACI 318-11 shear capacity calculation model were analyzed, and the rationality of the minimum fitting rate of each specification was further analyzed. One hundred and thirteen of them were compared with those without web reinforcement, and the changing trend of the ratio of the contribution of the stirrup to the beam’s bearing capacity was obtained. The results show that the predicted value of the calculation formula of “Design Code for Concrete Structure” (GB 50010-2010) is high, especially for ordinary strength concrete beams with high strength stirrups. For the average shear strength of reinforced concrete beams under concentrated load, The shear strength of the web beam under the action of cloth load is small, and the error of the American Standard ACI 318-11 prediction result is small. The minimum value of the tie-in rate of each standard is reasonable, which can effectively avoid the cable-stayed failure of the beam.