Carlos Chastre

Comportamento Estrutural de Ligações Dissipativas em Painéis de Fachada Pré-fabricados

The precast as a construction technique has several advantages, such as the increased strength and durability of concrete, the reduction of time and the necessity of fewer workers in the construction site, which leads to the reduction of the global cost of the construction.
However, these advantages depend on the simplicity and efficiency of the connections between the structure elements, and can be jeopardized if the structure and connections design do not pay particular attention to the elements that are considered non-structural but contribute for the dynamic response of the structure.
This study resulted from the need to find solutions for cladding panels connections to the structure, in order to enable them to contribute to a better performance of the building, by energy dissipation, during an earthquake.
This research focuses mainly in the cladding to frame connection, and the behavior of connections made with different models of mechanical energy dissipating devices has been tested through quasi-static tests. The mechanical devices used vary mainly in terms of dimensions, between two types of geometric configurations and two classes of steel.
The results from the laboratory tests are analyzed according to basic parameters of resistance, such as yield and ultimate force, and performance parameters, as the energy dissipated over the cycles developed by the device and its ductility.
It is proposed a multi-linear numerical model with simple and easy application to simulate the hysteretic behavior of mechanical energy dissipators with a geometry similar to tested devices.