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为研究无腹筋轻骨料混凝土梁的抗剪承载力,完成了集中荷载下的16根无腹筋混凝土简支梁的受剪承载力试验,得到无腹筋轻骨料混凝土梁抗剪破坏形态和抗剪承载力。根据试验结果与收集的试验数据,对多个抗剪计算模型进行模型误差分析。结果表明:Zararis的预测结果最差,美国规范ACI 318-11和加拿大规范CSA A23.3-04偏于保守,Muttoni和我国轻骨料规范的预测值偏于不安全,Zsutty拟合度最高,但预测值过于不安全。为提高轻骨料混凝土无腹筋梁抗剪计算的准确性和安全性,对试验数据进行非线性拟合,得到无腹筋轻骨料建议计算公式,该公式的计算结果与试验结果吻合较好。
In order to study the shear strength of non-web lightweight aggregate concrete beams, the shear strength tests of 16 non-reinforced concrete beams under concentrated load were completed and the shear failure modes and resistances of the non-web lightweight aggregate concrete beams were obtained Shear capacity. According to the test results and the collected test data, the model error analysis is performed on a plurality of shear calculation models. The results show that the predicted results of Zararis are the worst, the conservative values of ACI 318-11 and CSA A23.3-04 in the United States, the insensitivity of Muttoni and the predicted value of China’s lightweight aggregate specification, the highest Zsutty fitness, However, the forecast is too insecure. In order to improve the accuracy and safety of lightweight aggregate concrete without stiffeners, the proposed formula of non-stiffened lightweight aggregate was obtained by nonlinear fitting the experimental data. The calculated results are in good agreement with the experimental results.