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本文在12根集中荷载作用下高强混凝土有腹筋约束梁试验的基础上,分析了集中荷载作用下高强混凝土有腹筋约束梁的斜向开裂特点、破坏形态和抗剪性能、研究了剪跨比和含箍特征值对抗剪强度的影响. 依据试验结果,比较了几个有关抗剪强度公式对集中荷载作用下高强混凝土有腹筋约束梁抗剪强度计算的适用性.通过对试验数据的回归分析,提出了集中荷载作用下高强混凝土有腹筋约束梁抗剪强度计算建议公式及其适用范围。
In this paper, on the basis of 12 tests of high-strength concrete beams with confined tendons under concentrated loads, the oblique cracking characteristics, failure modes and shearing performance of high-strength concrete beams with web reinforcement under concentrated loads are analyzed. The effect of the hoop eigenvalues on the shear strength is compared. Based on the test results, the applicability of several shear strength formulae to the calculation of the shear strength of high-strength concrete beams with confined tendons under concentrated loads is compared. Through the regression analysis of test data The proposed formula for the shear strength calculation of high-strength concrete beams with web reinforcement under concentrated loads is proposed and its scope of application.