Viscous Dampers Utilized at an Operating Electronic Facility for Reducing Seismic Risk

2014 ◽  
Vol 1021 ◽  
pp. 128-139
Author(s):  
Heng Sheng Chang ◽  
Ji Ping Ge
Keyword(s):  
Energy Dissipation ◽  
Seismic Activity ◽  
Seismic Risk ◽  
Semiconductor Manufacturing ◽  
Damping Ratio ◽  
Viscous Damper ◽  
Fundamental Vibration ◽  
Passive Energy Dissipation ◽  
Energy Dissipation Devices

Using supplemental energy dissipation devices into the structure to increase the damping ratio for reducing the responses of seismic activity has become more and more popular. This paper presents a case study of seismic retrofit strategy, utilizing a type of passive energy dissipation device, namely, the viscous damper, in order to make an ongoing chips produced facility resistant to seismic activity. The building in question was a chips produced facility belonging to a semiconductor manufacturing company. This was a double FAB where the structure system was divided into an island building and an RC shell. The retrofit involved installing 44 non-linear dampers between the island building and the RC shell. This was due to the significant differences in the fundamental vibration periods. This paper will present the rationale of making a decision on the parameters of the dampers to give the optimum retrofit strategy.

Simplified Method for Pushover Curves of Asymmetric Structure with Displacement-Dependent Passive Energy Dissipation Devices

2007 ◽  
Vol 10 (5) ◽  
pp. 537-549 ◽  
Author(s):  
Hong-Nan Li ◽  
Gang Li
Keyword(s):  
Energy Dissipation ◽  
Analytical Method ◽  
Numerical Results ◽  
Asymmetric Structure ◽  
Engineering Analysis ◽  
Passive Energy Dissipation ◽  
Symmetric Structure ◽  
Simplified Method ◽  
Pushover Curve ◽  
Energy Dissipation Devices

This paper presents a simplified method to calculate pushover curves for an asymmetric structure with displacement-dependent passive energy dissipation devices (DDPEDDs). The deformations of a symmetric structure are analyzed in translation and torsion, respectively. These results are then combined in order to calculate the pushover curve for an asymmetric structure with DDPEDDs. The numerical results obtained by using the simplified analytical method are then compared to those obtained from the analysis of the models using the software SAP2000. The results show that the simplified analytical method can be an effective tool for engineering analysis of an asymmetric structure.

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