Projeto paramétrico estrutural otimizado de pórticos de edifícios em madeira engenheirada

Abstract

The use of engineered wood in structural systems has been gaining significant relevance. Similar to other structural approaches, it has become essential to adopt design techniques that allow for better exploration of the system's capabilities before developing the projects. To this end, it is advantageous to identify the optimal configurations of the structural system in relation to design variables. Such configurations can be obtained through the design solution space approach and parametric modeling. Thus, the objective of this research is to construct design solution spaces for engineered wood frame structural systems for buildings. The considered design variables include the number of floors, floor-to-ceiling height, total height, building length and width, engineered wood strength classes, and cross-sectional dimensions. The columns and beams are made of glued laminated timber (Gulam), while the slabs are made of cross-laminated timber (CLT). The construction of the solution spaces was carried out using a genetic algorithm integrated with the parametric model. The analysis of the results indicated that the material consumption rate is related to the strength classes of Glulam and CLT and the stability provided by the bracing center. Furthermore, it was observed that the main beams, which are responsible for transferring the loads from the slabs to the columns, have their structural acceptability primarily governed by shear. Another observation is that, from the eleventh floor onward, factors related to the overall stability of the structural system become highly relevant. It was also proven that the natural frequencies of the floor slabs are significantly affected by thickness, modulus of elasticity, spans, and support elements of the CLT panels.