Distribution of Seismic Damage in Steel Buildings Component Equipped by Viscoelastic Dampers against Far-Field Earthquake

Yaser Parvin Darabad,Beniamin Khodaei,Reza Zarei,Alireza Hassanpour Yasaghi

doi:10.1155/2021/8291173

Abstract

Damage to structures with the concept of inelastic behavior and consequently hysteresis energy is very close. Therefore, it can be said that hysteresis energy at these levels can be a significant criterion for designing or controlling the structure. In this research, the first three steel frames of 4, 8, and 12 floors with the medium bending frame system have been designed with the statically equivalent method according to valid international regulations; then, all frames have been subjected to nonlinear dynamic analysis by seven accelerometers. The purpose of this study is to investigate the distribution of damage, energy, relative displacement, roof displacement, and base shear in the studied frames. In the following, the necessity of using the retrofitting method to reduce the relative displacement is described based on the regulations. Then, viscoelastic dampers are used to strengthen and reduce damage in the studied frames in the face of distant field records. The obtained results indicate that despite the uniform distribution of resistance in the height of the floors, the hysteresis energy distribution and damage diagrams do not follow this distribution and other parameters such as hysteresis energy, which play a major role in structural members’ damage, should be included in the design process. In this research, viscoelastic dampers have been used for retrofitting. The results show that this type of damper shows good performance in reducing damage under earthquakes in the remote area.

Highlights

On average, 10,000 people annually suffer from earthquakes in the world. e studies performed by UNESCO indicate that the financial damage caused by the earthquake during 1926–1950 was about $ 10 billion
A lot of energy enters the structure, and it should absorb or lose this energy in different ways [6]. e members of the structure enter the inelastic range against the seismic energy, which is a considerable amount, so that they can absorb this energy through changing their deformations [7]
Erefore, the middle opening of all the floors of the studied frames is equipped with viscoelastic dampers to strengthen the above frames. en, controlling the relative displacement values of the floors indicated that adding dampers to the structure greatly reduces the relative displacement. en, the results obtained from parametric studies on the studied frames under far-field records were compared with dampers and without dampers in two cases

Summary

Introduction

10,000 people annually suffer from earthquakes in the world. e studies performed by UNESCO indicate that the financial damage caused by the earthquake during 1926–1950 was about $ 10 billion. E studies performed by UNESCO indicate that the financial damage caused by the earthquake during 1926–1950 was about $ 10 billion. During this time, two cities and 200 villages were destroyed in Central Asia [1]. At is why man is trying to deal with this natural phenomenon, in which he has made significant progress [4]. A lot of energy enters the structure, and it should absorb or lose this energy in different ways [6]. E members of the structure enter the inelastic range against the seismic energy, which is a considerable amount, so that they can absorb this energy through changing their deformations [7]. When the members of the structures enter the inelastic range, permanent deformations occur in the structure, which it is necessary to replace or strengthen those members that are too deformed or can no longer be used with new

Methods

Results

Conclusion