This paper presents the findings of an experimental study on the behavior of plastic-steel fiber (PSF) reinforced lightweight aggregate concrete (LWC) columns under axial compression loading. The experimental variables were concrete compressive strength, main reinforcement percentage, and PSF volumetric ratio. The behavior of the PSF reinforced LWC columns was evaluated in terms of the failure mode, load-bearing capacity, steel reinforcement strain, and ductility. The results showed that the addition of PSFs not only prevented premature spalling of the concrete cover but also strengthened the bond between the LWC and the steel bar. Compared with that of the control specimen, the ductility of the fiber-reinforced columns improved significantly. In addition to the experimental program, a numerical investigation based on nonlinear finite element (FE) analysis was performed using ANSYS 10.0. The experimental and numerical results were compared and found to be in satisfactory agreement. Furthermore, an analytical model developed in a previous study was used to predict the load-bearing capacities of the PSF reinforced LWC columns. The compressive strength of concrete, the spacing, and yield strength of transverse reinforcement were considered in the analytical models, and the analytical predictions were in agreement with the experimental results.

中文翻译：

---

塑钢纤维轻骨料混凝土柱在同心轴荷载作用下的性能

本文介绍了关于塑性钢纤维 (PSF) 增强轻骨料混凝土 (LWC) 柱在轴向压缩载荷下的行为的实验研究结果。实验变量是混凝土抗压强度、主筋百分比和 PSF 体积比。从破坏模式、承载能力、钢筋应变和延展性方面对 PSF 增强 LWC 柱的行为进行了评估。结果表明，PSF 的加入不仅可以防止混凝土保护层过早剥落，还可以加强 LWC 与钢筋之间的结合。与对照试件相比，纤维增强柱的延性显着提高。除了实验计划，使用 ANSYS 10.0 进行了基于非线性有限元 (FE) 分析的数值研究。对实验和数值结果进行了比较，发现其具有令人满意的一致性。此外，先前研究中开发的分析模型用于预测 PSF 增强 LWC 柱的承载能力。分析模型考虑了混凝土的抗压强度、横向钢筋的间距和屈服强度，分析预测与试验结果一致。