Performance-based design of bolted steel structures

Peralta, Hernan Alberto Coloma

http://hdl.handle.net/10400.8/3608

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Authors

Peralta, Hernan Alberto Coloma

Advisor(s)

Rodrigues, Hugo Filipe Pinheiro

Quillupangui, Byron Armando Guaygua

Abstract(s)

In the last decade, the philosophy of seismic design has change from the force-based design to performances based design due to the advantage that presents. Also, the performance based the design presents less simplification of the force method representing in a more accurate form the real behavior of the structure. One method of this new philosophy is the direct displacement-based design (DDBD); this method permits to take in count in more exact form the nonlinear behavior than the force method. The DDBD can be used to design new structures and analyze the retrofit of structures of concrete, steel, composed and timber. In the case of steel structure, the formulas used represent a bilinear behavior of the material and the yield displacement proper of the steel structural system. This displacement method can be used with deferent demands optimizing the design. Another technique used in the performed based design is the pushover analysis. This method can be used to design new structures, evaluated design, optimizing design and retrofit the structures. The pushover considers in a more accurate form the nonlinear behavior of the structure, and it show the fail mechanism; it can analysis if the structure presents the condition of strong column weak beam. Also, it can be determining the ductility and the damping of the structure. Another concert that engineers have nowadays is the design higher structures that satisfy high demands. In order to reaches the performance that require this demand seismic protection systems are used such as damper and insulators. In this project, the fluid viscous dampers are study; the advantages that present their used and the behavior faced a seismic event using time history analysis. Finally, it is designing a Fluid viscous dampers in study case to analysis the performance achieved and the advantage presented in the structure.