Reinforced Concrete Coupling Beams Subjected to Reversed Cyclic Loads

Six coupling beam specimens were tested under fully reversed cyclic displacements of increasing magnitude to investigate the effects of high-strength reinforcement on coupling beam behavior. The main variables of the test program included: yield stress of the primary longitudinal reinforcement (Grades 60, and 120 [420, and 830]), development length of longitudinal bars (fully developed or not), design shear stress, and axial restraint.

为研究高强钢筋对连梁（coupling beam）受力性能的影响，本试验对6个连梁试件施加幅值递增的完全往复循环位移开展加载测试。本次试验的主要变量包括：主要纵向受力钢筋的屈服强度（60级、120级，对应420MPa、830MPa）、纵向钢筋的锚固长度（充分锚固与未充分锚固）、设计剪应力以及轴向约束。