The use of GFRP bars in concrete structures has emerged as an alternative to conventional RC due to the corrosion of steel in aggressive environments. Although many studies were reported on concrete beams reinforced with GFRP bars, still the full potentiality of GFRP reinforced concrete is yet to be known. This study reports experimental, analytical and numerical investigations carried out on concrete beams reinforced with TMT and GFRP bars under monotonic loading. Experimental studies were carried out on concrete beams of size 100 × 200 × 1500 mm reinforced with TMT (10 mm and 12 mm dia.) and GFRP bars (10 mm and 13 mm dia.). The deflection of GFRP reinforced concrete beams corresponding to service load is found to be 2.75 times the deflection of TMT reinforced concrete beams. Widely used analytical/empirical models were compiled to predict the load deflection behaviour of beams. The analytical models were primarily based on effective moment of inertia to account for beams stiffness after cracking. Nonlinear finite element (FE) analysis has been carried out on concrete beams reinforced with TMT and GFRP bars. FE models were developed by employing the appropriate constitutive relationship of concrete, TMT and GFRP bars. The integrity of all the elements has been ensured by applying the appropriate constraint conditions. Average load–deflection plots obtained from experiments were compared with computed load–deflection of analytical and numerical studies. From the load–deflection behaviour, it is observed that (i) numerical prediction is stiffer and (ii) the analytical models incorporated with tension stiffening aspects predicted the deflections close to experimental observations.

由于在侵蚀性环境中钢的腐蚀，在混凝土结构中使用GFRP钢筋已成为传统RC的替代方法。尽管已经报道了许多关于用GFRP筋加固的混凝土梁的研究，但GFRP加固的混凝土的全部潜力仍是未知的。这项研究报告了在单调荷载下对用TMT和GFRP筋加固的混凝土梁进行的实验，分析和数值研究。对用TMT（直径10毫米和12毫米）和GFRP筋（直径10毫米和13毫米）加固的尺寸为100×200×1500毫米的混凝土梁进行了试验研究。GFRP钢筋混凝土梁对应于服务载荷的挠度为TMT钢筋混凝土梁挠度的2.75倍。编译了广泛使用的分析/经验模型来预测梁的荷载挠度行为。分析模型主要基于有效惯性矩来考虑开裂后梁的刚度。已经对用TMT和GFRP筋加固的混凝土梁进行了非线性有限元（FE）分析。通过采用混凝土，TMT和GFRP筋的适当本构关系来开发有限元模型。通过应用适当的约束条件，可以确保所有元素的完整性。将实验获得的平均载荷-挠度图与分析和数值研究的计算得出的载荷-挠度进行比较。从载荷-挠度行为，