Topological optimization of metallic dampers applied to vibration control in structures

Fernando dos Santos Oliveira¹; José Luís Vital de Brito¹; Suzana Moreira Avila¹

¹ Universidade de Brasília - UnB

doi:10.20906/CPS/CILAMCE2015-0263

Resumo

The construction of increasingly tall and slender buildings have become quite common in large cities, thus challenging the structural engineers to develop increasingly efficient designs so that the adopted arrangement can make best use of the characteristics of materials. The use of devices that add stiffness and damping to structures subjected to dynamic actions such as wind and earthquake loads, has become increasingly common in civil structures. One of these mechanical devices that has been widely used is the type of Added Damping and Stiffness (ADAS), which if correctly installed, can significantly increase the strength, stiffness and energy dissipation capacity of the structures of the buildings. ADAS type devices are basically energy dissipators installed in the structure in order that the dissipation occurs in these elements in a concentrated way, thereby protecting the main structure from further damage. Once the dynamic action that damages these elements occurs, they can be easily replaced without major costs. These energy dissipators have the further advantage of not require advanced technology for its production and can be easily installed in the structure. They also have the advantage that environmental factors such as temperature and humidity, has little or no effect in their performance. In the present study, as an alternative to ADAS, is worked the topology optimization of a metallic dissipator applied to the reduction of vibration in buildings subject to random environmental actions, raising through numerical analysis the appropriate device type format.

Palavras-chave: Structural dynamics; Vibration Control; Passive control; Topology Optimization