Sensitivity Analysis of Composite Cellular Beams to Constitutive Material Models and Concrete Fracture

Autor(es)

Ferreira, Felipe Piana Vendramell ^[1] ; Martins, Carlos Humberto ^[2] ; De Nardin, Silvana ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Rod Washington Luiz, Sao Carlos, SP - Brazil

^[2] Univ Estadual Maringa, Ave Colombo 5790, Maringa, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS; v. 21, n. 1 JAN 2021.
• Citações Web of Science: 0

Resumo

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 40 degrees, 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. (AU)

• Processo FAPESP: 18/22803-1 - Comportamento de vigas mistas celulares formadas por perfis I duplamente simétricos e lajes alveolares pré-fabricadas de concreto
• Beneficiário: Felipe Piana Vendramell Ferreira
• Modalidade de apoio: Bolsas no Brasil - Doutorado