Passive Control of Steel Structures Utilizing Cylindrical Friction Dampers

Passive Control of Steel Structures Utilizing Cylindrical Friction Dampers

نویسند‌گان: [ h Mirzaeefard ] - M.Sc. Graduate, Department of Civil Engineering, K.N. Toosi University of Technology, Tehran, Iran,[ h.r samani ] - Instructor, Department of Civil Engineering, Islamic Azad University – Pardis Branch, Tehran, Iran[ m mirtaheri ] - Associate Professor, Department of Civil Engineering, K.N. Toosi University of Technology, Tehran, Iran

خلاصه مقاله:

In this investigation, seismic response of steel structures utilizing Cylindrical Frictional Dampers (CFD) is studied. CFD is an innovative frictional damper which comprises two principal elements, the shaft and the hollow cylinder. These two elements are assembled such that one is shrink-fitted inside the other. If the damper’s axial force overcomes the static friction load, the shaft inside the cylinder will move and results in considerable mechanical energy absorption. To assess the efficacy of CFD, various steel frames are constructed and analyzed using OpenSees software. Nonlinear time history analyses and Incremental Dynamic Analysis (IDA) are applied to the frames and clear distinction has been drawn between the frames comprising CFD and the counterparts without CFD to emphasize the effectiveness of CFD in altering seismic responses. The results show that CFD extremely improves the seismic response of the structure

کلمات کلیدی:Passive control, Cylindrical Frictional Damper, Incremental Dynamic Analysis, Seismic response

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خوردگی و روشهای کنترل آن CORROSION AND CORROSION CONTROL -wiley 2008

 خوردگی و روشهای کنترل آن CORROSION AND CORROSION CONTROL -wiley 2008

CORROSION AND CORROSION CONTROL (An Introduction to Corrosion Science and Engineering) wiley 2008

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BP Process Safety Series Control of Work A collection of booklets describing hazards and how to manage them,

91 صفحه pdf

BP Process Safety Series Control of Work

A collection of booklets describing hazards and how to manage them, 

سرفصلها:

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Control of Work Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Control of Work process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Written procedures for Control of Work . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Roles and accountability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Training and competency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.4 Planning the work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.5 Risk assessment of work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.6 Permit to work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.7 Documentation, communication and approval . . . . . . . . . . . . . . . . . 57
2.8 Work monitoring and management . . . . . . . . . . . . . . . . . . . . . . . . . . 60
2.9 Safe conditions on completion/interruption of work . . . . . . . . . . . . . 63
2.10 Auditing the Control of Work process . . . . . . . . . . . . . . . . . . . . . . . . 66
2.11 Lessons learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
2.12 Obligation and authority to stop unsafe work . . . . . . . . . . . . . . . . . . 74
3. Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
4. Some points to remember . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Test yourself! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86



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