Title: Experimental and numerical study on the DADAS dampers in steel frame structure

Authors: Faezeh Nejati; Mahmood Hosseini; Amir Mahmoudzadeh

Addresses: Department of Civil Engineering, Ayandegan Institute of Higher Education, Tonekabon, Iran ' Structural Engineering Research Center, Faculty of Civil Engineering, International Institute of Earthquake and Seismology (IIEES), Tehran, Iran ' Faculty of Civil Engineering, Research Institute of Shakhes Pajouh, Isfahan, Iran

Abstract: In this study, a structural system with seesaw motion respect to a central massive support has been considered for steel buildings, and the bottom ends of the all circumferential columns at the lowest story have been equipped with double-ADAS (DADAS) dampers, which dissipate a great portion of the seismic input energy. The hysteretic behaviour of DADAS dampers has been investigated by using finite element analysis. The damper is modelled at structural laboratory of Earthquake Engineering Research Institute in small scale and tested under harmonic loaded. Experimental results show the proper conduct of the damper prototype is under load. To show the efficiency of the proposed structural system and dampers, a series of nonlinear time history analysis (NLTHA) were performed by using a set of three-component acceleration of some selected earthquakes. Numerical results of NLTHA show that the proposed rocking structures can efficiently decrease the seismic damage in the building.

Keywords: double-ADAS damper; DADAS; experimental study; finite element modelling; nonlinear time history analysis; NLTHA; seesaw motion of structures.

DOI: 10.1504/IJSMSS.2018.097833

International Journal of Sustainable Materials and Structural Systems, 2018 Vol.3 No.2, pp.123 - 150

Available online: 12 Feb 2019 *

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