Inelastic flexural deformations adversely affect shear resistance of columns, and may cause building damage/collapse during earthquakes. In this paper, shear-flexure interaction on seismic performance of reinforced concrete columns constructed with recycled aggregate concrete is experimentally investigated. For this aim, reinforced concrete columns with low shear-span-to-depth ratio (2.3) were designed and constructed so that they reach their flexural lateral load capacities in accordance with capacity design principles, and the effect of shear deformations can be observed only after yielding of longitudinal reinforcing bars due to cyclic degradation. The shear-flexure interaction is characterized based on the amount of transverse reinforcement, and formulated within the framework of conventional reinforced concrete design theory during the design of the columns. These columns are then tested under the combined effects of axial and reversed cyclic lateral loads to simulate seismic loading. The recycled concrete aggregate is sourced from waste of low strength concrete, and replaced with 50% of natural coarse aggregate for the concrete mix. Comparison with columns constructed of natural aggregate is also presented in the study. The test results showed that the reinforced concrete columns either made of natural aggregate concrete or recycled aggregate concrete exhibited similar seismic performances for different interactions of shear and flexure. As the ratio of transverse reinforcement is reduced the deformation capability was reduced due to more pronounced effect of shear deformations. In addition, the load–displacement relationships determined through theoretical analysis were found to be compatible with the experimental data. Furthermore, a discussion on the minimum transverse reinforcement provisions of EN 1998-1, ACI 318-19 and TBEC-18 is also presented in order to investigate whether it is possible to reduce the required ratio of minimum transverse reinforcement per technical documents for the columns located in low to moderate seismicity regions.

非弹性挠曲变形会对柱的抗剪强度产生不利影响，并可能在地震期间导致建筑物损坏/倒塌。本文以再生骨料混凝土为例，研究了剪弯作用对钢筋混凝土柱抗震性能的影响。为此，设计并建造了具有低剪切跨度-深度比（2.3）的钢筋混凝土柱，以使其按照承载力设计原则达到其挠曲侧向承载力，并且只能观察到剪切变形的影响。在纵向钢筋屈服后由于循环降解。剪切-弯曲相互作用的特征是基于横向钢筋的数量，并在柱设计过程中在常规钢筋混凝土设计理论的框架内制定。然后在轴向和反向循环侧向荷载的共同作用下测试这些柱，以模拟地震荷载。再生的混凝土骨料来自低强度混凝土废料，并用50％的天然粗骨料代替混凝土。在研究中还提出了与天然骨料柱的比较。试验结果表明，由天然集料混凝土或再生集料混凝土制成的钢筋混凝土柱在剪切和挠曲的不同相互作用下表现出相似的抗震性能。随着横向钢筋比率的减小，由于剪切变形的更明显的影响，变形能力降低。另外，发现通过理论分析确定的载荷-位移关系与实验数据兼容。此外，还讨论了EN 1998-1，ACI 318-19和TBEC-18的最小横向钢筋规定，以调查是否有可能降低每个技术文档中有关柱的最小横向钢筋比例位于中低地震活动区。