In order to investigate the static and dynamic flexural behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC) beams, twelve half-scale beams (125 $\times$ 250 $\times$ 2438 mm) were fabricated and tested under quasi-static and drop-weight impact loading conditions. Four different volume fractions (v_f) of steel fibers, i.e., 0, 0.5, 1.0, and 1.5%, and shear reinforcements were considered as test variables. Force-displacement relations and energy dissipating capacity were derived to evaluate and compare the impact resistance of the UHPFRC beams. The force-displacement curves, excluding inertial effects, were obtained by a proposed process using D’Alembert’s dynamic equilibrium principle, and energy dissipating capacity was calculated by integrating the overlapped force-displacement curves of sequential impact tests. Furthermore, the equivalent blast load was converted from the impact force to extend the utilization of impact test results for substituting difficult blast tests on structural specimens. Lastly, the test results indicate that the addition of steel fibers and stirrups enhanced the static and impact resistances of the UHPFRC beams in terms of higher load carrying capacity, higher energy dissipating capacity, and lower maximum and residual displacements. As for specimens without steel fibers and stirrups, brittle shear failure occurred under static and impact loading conditions.

为了研究超高性能纤维混凝土（UHPFRC）梁的静态和动态挠曲性能，采用十二个半比例梁（125 $\times$ 250 $\times$在准静态和落锤冲击载荷条件下制造并测试了2438毫米）。四种不同的体积分数（v _f钢纤维的0％，0.5％，1.0％和1.5％）和剪切增强被视为测试变量。推导了力-位移关系和耗能能力，以评估和比较UHPFRC梁的抗冲击性。通过拟议的过程，使用D'Alembert的动态平衡原理获得了力-位移曲线（不包括惯性效应），并且通过合并顺序冲击试验的重叠力-位移曲线来计算能量耗散能力。此外，从冲击力转换了等效的爆炸载荷，以扩展冲击试验结果的利用，代替了对结构标本的困难爆炸试验。最后，测试结果表明，钢纤维和箍筋的添加提高了UHPFRC梁的抗静冲击性能，具有更高的承载能力，更高的能量耗散能力以及更低的最大位移和残余位移。对于没有钢纤维和箍筋的试样，在静态和冲击载荷条件下会发生脆性剪切破坏。