Recent progress in finite element analysis aids the simulation of seismic vibration of an entire reinforced concrete (RC) building structure and indicates that drying shrinkage cracks affect seismic resistance performance. Polypropylene fiber-reinforced concrete (PFRC) is a promising material since the fibers will reduce the cracks and strains under drying shrinkage. This paper attempts to quantify the vibration characteristics of PFRC walls by means of a drop-weight test and finite element analyses. Four wall specimens having the same geometry and bar arrangement are prepared. After a one-year drying shrinkage period, the walls are subjected to impact loading of a constant collision velocity of 5 m/s, using a steel drop weight of 398.8 kg. Shear cracks are observed in the restrained wall made of plain concrete, while cracks are insignificant in the PFRC wall. Three-dimensional (3D) nonlinear finite element analyses are conducted to simulate all behaviors from drying shrinkage cracking up to the time of impact loading, and to estimate the vibration characteristics. The analysis results indicate that the polypropylene fiber content reduces the elongation of the natural period by an average of 13.7%.

有限元分析的最新进展有助于模拟整个钢筋混凝土（RC）建筑结构的地震振动，并表明干燥收缩裂缝会影响抗震性能。聚丙烯纤维增强混凝土（PFRC）是一种很有前途的材料，因为该纤维将减少干燥收缩下的裂缝和应变。本文试图通过落锤试验和有限元分析来量化PFRC墙的振动特性。准备了四个具有相同几何形状和杆排列的壁标本。经过一年的干燥收缩期后，使用398.8 kg的钢滴重量，使壁承受5 m / s恒定碰撞速度的冲击载荷。在由普通混凝土制成的约束墙中观察到了剪切裂缝，PFRC墙的裂缝微不足道。进行了三维（3D）非线性有限元分析，以模拟从干燥收缩裂纹到冲击载荷时间的所有行为，并估计振动特性。分析结果表明，聚丙烯纤维含量使自然周期的伸长率平均降低了13.7％。