Composite cellular beams are an advantageous solution that can be used to reduce floor height by solving service ducts problems. In the previous literature, there is little information on numerical modeling that considers sensitivity analysis in composite cellular beams, varying the constitutive models of steel and concrete materials. The concrete, when submitted by external loading, undergoes volume variations caused by inelastic deformations. The parameter that measures dilatancy is known as the dilation angle. This work aims to analyze the sensitivity of the computed response of composite cellular beams to the constitutive models of steel and concrete materials, and the parameters that constitute concrete damage plasticity (CDP). Geometrical nonlinear analyses are performed based on tests, considering solid elements for the composite slab and shear connectors, and shell elements for the cellular beam. It was concluded that the flexural behavior was not sensitive to dilation angles, unlike structures in which the resistance is governed by shear forces. For a dilation angle equal to [Formula: see text], a better post-peak behavior was observed in the load-displacement relationship. It was found that by varying the viscosity parameter (or relaxation time), the load-displacement behavior relationship is not affected.

中文翻译：

---

复合单元梁对本构材料模型和混凝土断裂的敏感性分析

复合蜂窝梁是一种有利的解决方案，可用于通过解决服务管道问题来降低地板高度。在以前的文献中，很少有关于考虑复合蜂窝梁的敏感性分析的数值建模信息，改变了钢和混凝土材料的本构模型。混凝土在受到外部载荷时会经历由非弹性变形引起的体积变化。衡量膨胀度的参数称为膨胀角。本工作旨在分析计算的复合蜂窝梁响应对钢筋和混凝土材料本构模型的敏感性，以及构成混凝土损伤塑性 (CDP) 的参数。基于测试执行几何非线性分析，考虑组合板和剪力连接件的实体单元，以及蜂窝梁的壳单元。得出的结论是，弯曲行为对扩张角不敏感，这与阻力受剪切力控制的结构不同。对于等于 [公式：参见文本] 的膨胀角，在载荷-位移关系中观察到更好的峰值后行为。发现通过改变粘度参数（或弛豫时间），载荷-位移行为关系不受影响。在载荷-位移关系中观察到更好的峰值后行为。发现通过改变粘度参数（或弛豫时间），载荷-位移行为关系不受影响。在载荷-位移关系中观察到更好的峰值后行为。发现通过改变粘度参数（或弛豫时间），载荷-位移行为关系不受影响。