Analysis of the steel braced frames equipped with ADAS devices under the far field records

Abstract

The usefulness of supplementary energy dissipation devices is now quite well-known in earthquake structural engineering for reducing the earthquake-induced response of structural systems. The seismic behavior of structures with supplemental ADAS devices is concerned in this study. In this paper, the ratio of the hysteretic energy to input energy is compared in different structural systems. The main purpose of this paper is to evaluate the behavior of structures equipped with yielding dampers (ADAS), located in far fields based on energy concepts. In order to optimize their seismic behavior, the codes and solutions are also presented. Three cases including five, ten and fifteen-story three-bay Concentric Braced Frames (CBF) with and without ADAS were selected. The PERFORM 3D.V4 software along with three earthquake records (Northridge, Imperial Valley and Tabas) is used for nonlinear time history analysis and the conclusions are drawn upon energy criterion. The effect of PGA variation and height of the frames are also considered in the study. Finally, to increase the energy damping ability and reduce the destructive effects in structures on an earthquake event, so that a great amount of induced energy is damped and destruction of the structure is prevented as much as possible by using ADAS dampers.

On the effect of the near field records on the steel braced frames equipped with energy dissipating devices

“…Mathematical formulation of a viscous damped SDOF system subject to horizontal earthquake ground motion is [1];…”

“…The Equation (4) is the "Relative" Energy Equation [1,33]. In this study we considered the "relative" energy method for evaluation of input energy of structures and the total input energy of structures are compared at the time when the earthquake is over and the motion of structure is damped.…”

“…Bayat considered the work on the steel braced frame structures equipped with ADAS devices under the far field record and in this study, which is an extension of the authors' previous works [1], the effect of the near field records is considered on the steel braced frames equipped with energy dissipating devices. The near-fault earthquake characteristics outlined above should be considered in the design of structures located in near-fault regions.…”

Analysis of Nonlinear Vibration of Coupled Systems With Cubic Nonlinearity

“…They are not valid for strongly nonlinear equations and there have many shortcomings. Many new techniques have appeared in the open literature to overcome the shortcomings, such as Homotopy perturbation [11], energy bal-ance [12][13][14][15], variational approach [16,17], max-min approach [18], Iteration perturbation method [19] and other analytical and numerical methods [20][21][22][23][24][25][26][27][28][29][30][31][32].…”

The natural frequencies of composite Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) system

“…Studies on dynamic characteristics of the structural system with focusing on their natural frequencies have been performed from last decades [3,4,13,14,41]. Hurst and Lezotte conducted an analytical and experimental study on the natural frequency of the plywoodjoist system considering the effect of joist size on the results.…”