Shear tab connections are one of the most commonly used simple beam-end framing connections. Simple connections are designed to resist shear forces at ambient temperature. This study aims at identifying the key parameters that affect the behavior of composite beams with shear tab connections under fire. Large axial forces are generated during a fire event due to the thermal expansion of the materials. These forces, which are not considered in the design, could lead to connection failure. In this study, finite element (FE) models are developed in Abaqus and validated against experimental data available in the literature. The strength degradation of the steel material at elevated temperatures is accounted for using retention factors. Concrete damage plasticity is implemented to model the concrete behavior at high temperatures. FE simulations are then performed to investigate the effect of different parameters on the behavior of shear tab connections in composite beams subjected to fire. The main parameters are: load ratio, concrete slab temperature, shear tab thickness, setback distance, bolt diameter, in addition to the creep in the concrete and the partial composite action. This proposed research provides more guidance on the effect of thermally induced forces and deformations of shear tab connections with composite beams. It also provides the basis for developing simple methods of analysis.

中文翻译：

---

预测火灾中组合梁的剪力片连接需求

剪力片连接是最常用的简单梁端框架连接之一。简单的连接设计用于抵抗环境温度下的剪切力。这项研究旨在确定影响剪力片连接的复合梁在火灾下性能的关键参数。由于材料的热膨胀，在火灾期间会产生很大的轴向力。设计中未考虑的这些力可能导致连接失败。在这项研究中，有限元（FE）模型是在Abaqus中开发的，并根据文献中的实验数据进行了验证。钢材在高温下的强度下降是由保持因子引起的。实现混凝土损伤可塑性以模拟高温下的混凝土行为。然后进行有限元模拟，以研究不同参数对复合梁受火时抗剪翼片连接性能的影响。主要参数是：载荷比，混凝土板温度，剪力片厚度，后退距离，螺栓直径，以及混凝土中的蠕变和部分复合作用。这项拟议的研究为热诱导力和剪切翼片连接梁的变形提供了更多指导。它还为开发简单的分析方法提供了基础。除了混凝土中的蠕变和部分复合作用外。这项拟议的研究为热诱导力和剪切翼片连接梁的变形提供了更多指导。它还为开发简单的分析方法提供了基础。除了混凝土中的蠕变和部分复合作用外。这项拟议的研究为热诱导力和剪切翼片连接梁的变形提供了更多指导。它还为开发简单的分析方法提供了基础。