Structural optimization of concrete plane frames considering the static and dynamic wind effect

Abstract

This study has as its main purpose the structural optimization of plane frames in concrete, having as the objective function the minimum total weight of the structure. For this purpose, external actions, considered within the optimization process, are intended to represent accurately all effects observed in a real situation. In such manner, loads are dependent on the cross-section obtained in each optimization step, as well as the static and dynamic effects of the wind are considered for a more realistic representation. The optimization method adopted is the Teaching-Learning Based Optimization (TLBO). Thus, all proper design constraints were considered in accordance with Brazilian standards for concrete structures. From the results obtained in both situations (static and dynamic effects), it is possible to notice the difference regarding external actions, in which higher loads were obtained in higher floors, using the simplified dynamic model proposed in standards. Regarding the analysis of the structure optimization, the weight was higher when the applied forces were the result of the dynamic wind model, in which the larger cross-sections were found at the bottom of the structure. Even though this may be a well-known issue, the present work shows a quantitative study in which both effects are discussed in detail, as well as it features a methodology, based on a novel optimization method and with a straightforward implementation, that could be adapted for the analysis of more complex structures.

Optimum design of precast and prestressed beams with focus on CO2 emission reduction

“…Juliani and Gomes [15] optimized reinforced concrete (RC) frames, with genetic algorithms, such as Pires and Silva [16] which optimized slender RC columns subject to biaxial bending. Cardoso et al [17] evaluated the static and dynamic wind effect applying structural optimization of concrete plane frames. Christoforo et al [18] and Moraes et al [19] applied optimization for wood truss roof structures.…”