Database for Shear Tests on Reinforced UHPC Considering Axial Load and Fiber Alignment Effects

This dataset is associated with an experimental study that investigated the effects of axial load and fiber alignment on the shear behavior of ultra-high-performance concrete (UHPC) panels reinforced with traditional steel bars at a 0.67% reinforcement ratio. Three UHPC panels were tested using the Universal Panel Tester (UPT) facility under different loading scenarios: pure shear, shear with axial compression, and shear with axial tension. Companion material tests, including compression cylinder tests, direct tension tests (DTTs), four-point bending tests (4PBs), and steel bar coupon tests, were conducted to evaluate the mechanical properties of both UHPC and reinforcing bars. The findings revealed that applying an axial tensile load ratio of 33% reduced the shear strength by 12.3%, while an axial compressive load ratio of 5% enhanced the shear strength by 77.6%. Fiber alignment analyses indicated that boundary effects induced by reinforcing bars caused a reduction in the fiber alignment factor by up to 38.1% relative to the DTT specimens.

本数据集关联一项实验研究，该研究探究了轴荷载与纤维排布对配筋率为0.67%的传统钢筋增强超高性能混凝土（UHPC）板抗剪性能的影响。研究采用万能板件试验机（UPT）设备对3块UHPC板开展试验，加载工况涵盖纯剪切、轴压耦合剪切以及轴拉耦合剪切三种形式。为表征UHPC与增强钢筋的力学性能，同步开展了配套材料试验，包括圆柱体抗压试验、直接拉伸试验（DTTs）、四点弯曲试验（4PBs）以及钢筋拉伸试样试验。试验结果表明，施加33%的轴拉荷载比会使抗剪强度降低12.3%，而施加5%的轴压荷载比则可使抗剪强度提升77.6%。纤维排布分析结果显示，相较于直接拉伸试验试样，钢筋诱导产生的边界效应可使纤维排布因子最高降低38.1%。