An experimental test was conducted to analyze the Local Bond Stress (LBS) between Ultra-High-Performance Concrete (UHPC) and reinforcing steel bars. The test included 144 specimens based on RILEM standards, using pullout tests. Reinforcing steel bars of 16 mm and 18 mm in diameter, nano-silica contents from 0% to 6.5% by weight of cement, conventional and thermal curing methods, and the bond lengths and concrete covers of $d_b$, ${2d}_b$ and ${3d}_b$ were the research parameters in this study. Moreover, sixteen experimentally tested and 39 non-tested specimens were modeled using ABAQUS by taking into account additional parameters such as bond length and concrete cover of ${4d}_b$, and bar diameters of 12, 14, 16, 18 and 20 mm. The resulting proposal was a comprehensive LBS equation to calculate the local bond stress between reinforcing steel bars and UHPC. A fair comparison between the results confirmed that the values obtained from the proposed LBS equation were logically in good agreement with the experimental and numerical results.

进行了实验测试，以分析超高性能混凝土（UHPC）与钢筋之间的局部粘结应力（LBS）。该测试使用拔出测试包括基于RILEM标准的144个样本。直径为16 mm和18 mm的钢筋，纳米硅含量为水泥重量的0％至6.5％，常规和热固化方法以及粘结长度和混凝土覆盖层$d_b$， ${2d}_b$ 和 ${3d}_b$是这项研究的研究参数。此外，使用ABAQUS对16个经过实验测试的样本和39个未经测试的样本进行了建模，并考虑了其他参数，例如粘结长度和混凝土的覆盖率。${4d}_b$，并且棒直径为12、14、16、18和20毫米。由此产生的建议是一个综合的LBS方程，用于计算钢筋和UHPC之间的局部粘结应力。结果之间的合理比较证实，从拟议的LBS方程获得的值在逻辑上与实验和数值结果吻合良好。