Steel reinforced concrete columns have been studied extensively and design equations developed, which form the basis of current design guidelines. However, these equations may need modifications before they are used in design of the columns reinforced with FRP bars. FRP materials behave elastically up to their ultimate strength with very little plastic deformation. Consequently, the serviceability and strength requirements should be examined for FRP reinforced concrete columns.rnThis paper presents the summary of the on-going experimental and analytical studies on the ultimate strength behavior of columns reinforced with Carbon Fiber Reinforced Plastics (CFRP) bars. Eight concrete columns 15 cm × 15 cm × 2.43 m. reinforced with four 7.5 mm CFRP bars were tested under axial loads with varying eccentricities. The columns were instrumented to measure the strains and lateral displacements throughout the tests. Data regarding the failure modes, crack formations and ultimate strength were collected to investigate the behavior of concrete members reinforced with CFRP bars. Based on the experimental data, axial load-moment interaction relationship was developed for the columns and compared with the theoretical relationship calculated based on strain compatibility.
展开▼
机译：对钢筋混凝土柱进行了广泛的研究并开发了设计方程，这些方程构成了当前设计指南的基础。但是，在将这些方程式用于设计用FRP筋加固的柱子之前，可能需要进行修改。 FRP材料具有弹性，可达到其极限强度，几乎没有塑性变形。因此，应该对FRP钢筋混凝土柱的使用性和强度要求进行检查。rn本文对碳纤维增强塑料（CFRP）钢筋柱的极限强度行为进行了持续的实验和分析研究。八个混凝土柱15厘米×15厘米×2.43 m。用四个7.5 mm CFRP筋加固的钢筋在不同偏心率的轴向载荷下进行了测试。在整个测试过程中，对色谱柱进行测量以测量应变和横向位移。收集有关破坏模式，裂纹形成和极限强度的数据，以研究用CFRP筋加固的混凝土构件的性能。根据实验数据，建立了柱的轴向荷载－力矩相互作用关系，并将其与基于应变相容性计算的理论关系进行了比较。
展开▼
