Increasing the bending capacity of reinforced concrete (RC) elements is one of important topics in structure engineering. The goal of this study is to develop a transferred stress system (TSS) on longitudinal reinforcement bars for increasing the bending capacity of RC frames. The study is divided into two parts, i.e., experimental tests and nonlinear FE analysis. The experiments were carried out to determine the load-deflection curves and crack patterns of the ordinary and TSS fixed frame. The FE models were developed for simulating the fixed frames. The obtained load-deflection results and the observed cracks from the FE analysis and experimental tests are compared to evaluate the validation of the FE nonlinear models. Based on the validated FE models, the stress distribution on the ordinary and TSS bars were evaluated. We found the load carrying capacity and ductility of TSS fixed beam are 29.39% and 23.69% higher compared to those of the ordinary fixed beams. The crack expansion occurs on the ordinary fixed beam, although there are several crack openings at mid-span of the TSS fixed beam. The crack distribution was changed in the TSS fixed frame. The TSS fixed beam is proposed to employ in RC frame instead of ordinary RC beam for improving the performance of RC frame.

提高钢筋混凝土构件的抗弯能力是结构工程中的重要课题之一。这项研究的目的是在纵向钢筋上开发传递应力系统（TSS），以提高RC框架的抗弯能力。该研究分为两个部分，即实验测试和非线性有限元分析。进行实验以确定普通和TSS固定框架的载荷-挠度曲线和裂缝模式。有限元模型是为模拟固定框架而开发的。比较有限元分析和实验测试获得的载荷-挠度结果和观察到的裂纹，以评估有限元非线性模型的有效性。基于已验证的有限元模型，评估了普通钢筋和TSS钢筋上的应力分布。我们发现，TSS固定梁的承载能力和延性分别比普通固定梁高29.39％和23.69％。裂纹扩展发生在普通固定梁上，尽管在TSS固定梁的中跨处有多个裂纹开口。在TSS固定框架中，裂纹分布发生了变化。为了提高RC帧的性能，提出将TSS固定波束用于RC帧而不是普通的RC波束。