Seismic Vulnerability of Cabinet Facility with Tuned Mass Dampers Subjected to High- and Low-Frequency Earthquakes

Thanh-Tuan Tran,Seongkyu Chang,Anh-Tuan Cao,Dookie Kim

doi:10.3390/app10144850

Abstract

The study investigates the collapse probability of a cabinet facility with a tuned mass damper (TMD) subjected to high- and low-frequency earthquakes. For this aim, a prototype of the cabinet in Korea is utilized for the numeric simulation. The accuracy of the finite element model is evaluated via the impact hammer tests. To mitigate the seismic response of the structure, a TMD system is developed whose properties are designed based on the outcomes from the modal analysis (i.e., modal frequencies and mode shapes). Furthermore, the influences of earthquake frequency contents on the seismic response are evaluated. The numeric analyses are conducted using a series of eighty earthquakes that are classified into two groups corresponding to low- and high-frequency motions. Finally, fragility curves are developed for the cabinet subjected to different ground motion sets. The results quantify the seismic vulnerability of the structure and demonstrate the influences of earthquake frequency contents and the vibration control system on the seismic response of the cabinet.

Highlights

Nonstructural components (NSCs) or secondary systems are those parts and elements suspended from, mounted on or attached to floors, roofs and walls of buildings or industrial facilities that are not intended to contribute to the structural load-bearing systems [1]
The present study evaluates the seismic performance of electrical file cabinets and the effect of tuned mass damper (TMD) on the improvement of the performance of these secondary systems
The performance of the structure is obtained via time history analyses

Summary

Introduction

Nonstructural components (NSCs) or secondary systems are those parts and elements suspended from, mounted on or attached to floors, roofs and walls of buildings or industrial facilities that are not intended to contribute to the structural load-bearing systems [1]. Examples of NSCs in building structures are piping systems, heating, ventilation and air conditioning units, pumps, electrical equipment, suspended ceilings, windows, bookshelves, file cabinets, furniture and appliances. Many studies in the past have been conducted to improve the understanding of the seismic performance of NSCs [4,5,6,7,8,9,10]. For this aim, different tests such as impact hammer test, sine test or shaking table test can be used [9,10,11,12]. The present study evaluates the seismic performance of electrical file cabinets and the effect of TMDs on the improvement of the performance of these secondary systems

Objectives

Results

Conclusion