In recent decades, self-compacting concrete (SCC) has gradually gained popularity based on its unique workability without any internal and external vibration. SCC development must ensure an acceptable level of balance between deformability and stability by following the characteristics of materials and the mix proportions. In the case of the structural performance of reinforced concrete (RC) structures throughout the earthquake, beam-column connections behavior is one of the most common causes of failures. On the other hand, T-shaped beam-column connections on the top floor have a critical condition based on the different types of live loads. As an alternative, SCC with specific properties includes workability and resilience against segregation, which is a great solution to improving the behavior of RC connections in a seismic area. In this paper, experimentally and numerically, investigation of six T-shaped SCC beam-column connections through different reinforcing bars ratio (ρ) are presented to better understand their behavior during the gravitational load like heavy snow, particularly in terms of failure mechanisms and cracking performance. In the experimental stage, firstly, the mechanical specifications of SCC have been examined in terms of slump flow, V funnel, J ring, and L box tests. Secondly, the load-displacement performance of T-shaped beam-column connections at the top floor has been reported in terms of bonding behavior, ductility, and energy dissipation capacity. The displacement ductility of the experimental results are decreased from 12.4 to 3.5 while the ratio of the reinforcing bars was increased from %15 to %66 of the balanced section, and the energy dissipations capacity was increased by increasing the reinforcing ratios until %56 of the balanced section then started to decrease. In the theoretical part of the study, a three-dimensional nonlinear finite element method (FEM) model (ABAQUS) was employed along with the load-deflection curves were reported to compare the experimental results with the numerical output. The test results demonstrate, employing SCC as a type of concrete that has enough workability in RC connections had successful fulfillment in terms of ductility, load-carrying capacity, and energy dissipation.

在最近的几十年中，自密实混凝土（SCC）由于其独特的可加工性而不受任何内部和外部振动的影响，逐渐受到欢迎。SCC开发必须通过遵循材料的特性和混合比例来确保变形性和稳定性之间的平衡达到可接受的水平。就整个地震期间钢筋混凝土（RC）结构的结构性能而言，梁柱连接行为是最常见的破坏原因之一。另一方面，基于不同类型的活荷载，顶层的T形梁柱连接处于临界状态。作为替代方案，具有特定属性的SCC包括可加工性和抗偏析性，这是改善地震区域RC连接行为的好方法。在本文中，在实验和数值上，通过不同的钢筋比率（ρ）对六个T形SCC梁柱连接进行了研究，以更好地理解它们在大雪等重力载荷下的行为，特别是在破坏机理和开裂性能方面。在实验阶段，首先，从坍落度，V漏斗，J形环和L箱试验方面检查了SCC的机械规格。其次，已经报道了在顶楼的T形梁柱连接的荷载-位移性能，其粘结性能，延展性和能量耗散能力均得到了体现。实验结果的位移延性从12.4降低到3.5，而钢筋的比例从平衡截面的％15增加到％66，并通过增加增强比来增加能量消散能力，直到平衡截面的％56开始下降。在研究的理论部分，采用了三维非线性有限元方法（FEM）模型（ABAQUS），并结合了载荷-挠度曲线，将实验结果与数值输出进行了比较。测试结果表明，采用SCC作为混凝土，在RC连接中具有足够的可加工性，在延性，承载能力和能量耗散方面都取得了成功。利用三维非线性有限元模型（ABAQUS），并结合载荷-挠度曲线，将实验结果与数值输出进行了比较。测试结果表明，采用SCC作为混凝土，在RC连接中具有足够的可加工性，在延性，承载能力和能量耗散方面都取得了成功。利用三维非线性有限元模型（ABAQUS），并结合载荷-挠度曲线，将实验结果与数值输出进行了比较。测试结果表明，采用SCC作为混凝土，在RC连接中具有足够的可加工性，在延性，承载能力和能量耗散方面都取得了成功。