Grillage Modeling Approach Applied to Simple-span Slab-girder Skewed Bridges for Dynamic Analysis

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Miriam Guadalupe López Chávez
António Arêde
José Manuel Jara Guerrero
Pedro Delgado
Humberto Varum

Abstract

This study involves the applicability of a simplified modeling technique to simple-span slab-girder skewed bridges for dynamic analysis, based on grillage modeling strategies. To evaluate the applicability of this technique, skew angles ranging from 0° to 60° are studied. The ability to capture vibration modes of grillage models is compared with three-dimensional (3-D) finite element (FE) models, using shell and frame elements. The effect of the skew angle in the grillage modeling technique of the bridge's deck and the grillage model accuracy associated with the orientation of the transverse grillage members (TGMs) are studied. The grillage modeling technique eliminates shell elements to model the slab, reducing the number of degrees of freedom and the computational time in the bridge model, but, although its simplicity, demonstrates good ability to capture the vibration modes.

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Author Biographies

Miriam Guadalupe López Chávez, Universidade do Porto

Departamento de Engenharia Civil

Faculdade de Engenharia

Universidade do Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal

António Arêde, Universidade do Porto

Departamento de Engenharia Civil

Faculdade de Engenharia

Universidade do Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal

José Manuel Jara Guerrero, Universidade de Michoacan

Faculty of Civil Engineering

Universidade de Michoacan - MICHOACAN

Mexico

Pedro Delgado, Instituto Politécnico de Viana do Castelo

Escola Superior de Tecnologia e Gestão

Instituto Politécnico de Viana do Castelo

Avenida do Atlântico, n.º 644

4900-348 VIANA DO CASTELO

Portugal

Humberto Varum, Universidade do Porto

Departamento de Engenharia Civil

Faculdade de Engenharia

Universidade do Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal