Abstract

In this study, a new type of structural damper in the form of braces based on pre-bent strips has been proposed. In designing the structures, parameters that support the safety of structures like base shear, acceleration and displacement are so important. To create safe conditions in structures some new technologies like vibration control and isolation have been considered. Vibration control has been studied by dissipation of the seismic energy which contains vibration isolator like dampers. In this paper a new kind of energy dissipative devices has been utilized and simulated by FEM in ABAQUS. According to other studies, investigation on experimental methods to prove some features of pre bent struts as column, one of which was about per bent strips as damper on brace but as experimental study which contains parametric investigation about pre bent strips with simple prototype was studied. In this paper, pre bent steel strips have been studied by FEM in various structural models under different dynamic loading. Some seismic responses of structures like base shear, acceleration and displacement have been investigated to prove the efficiency of this damper. In order to compare the results for models with damper and without damper and achieve accurate result and approximation, a rational approach to the performance of pre bent steel strips in structure with various spans and stories, the average responses of 3 different dynamic loading like Palm Sprins, Northridge, Fruili has been demonstrated which functioned as a bilinear inelastic stress-strain model for mild steel simulation in ABAQUS.

Key words: Pre bent strips, response of structure, damper, energy-dissipation.