Improved Seismic Response of RC Frame Structures by Using Fluid Viscous Dampers
Abstract
In modern era passive control devices are used to improve the seismic response of structures during large magnitude earthquakes. In this research an analytical study is carried out on commercial FEM program SAP 2000 by modeling five, seven and nine storey RC frame structures. Response to four earthquake ground motions on modeled frame structures is studied and is effectively controlled by varying the characteristic properties of Fluid viscous dampers (FVD). Response in terms of frequency, displacement, velocity, acceleration, storey drift, base shear and energy dissipation is studied. Quantitatively in the modeled frames damage in terms of percentage change in global stiffness and natural frequency is determined. Qualitatively damage in terms of performance levels as per ATC-40 and FEMA-440 is considered. With an increase in Additional Stiffness Ratio of FVD corresponding increase in natural frequency and reduction in dynamic response is observed. FVDs significantly improve structural performance level of frames from Completely Damage to Immediate Occupancy/Operational Level during large magnitude earthquakes.References
B.F.Spencer Jr and S. Nagarajaiah ; Journal of Structural Engineering, ASCE July (2003) 845-856.
M. D. Symans, F. A. Charney ; FEMA Presentation on Seismic protective systems: Passive energy dissipation, presented at MBDSI in 2001and 2002.
Fundamental Concepts of Earthquake Engineering ; Luis Esteva (1980) Ch-17 “Seismic Code Provisions”, Vol.1, 753-923.
Q. S. Khan ; Application of vibration control in health monitoring of building structures, M.Sc. Thesis, CED, UET, Lahore (2011).
K. Kawashima and S. Unjoh ; Seismic response control of bridges by variable dampers, Journal of Structural Engineering (1994), 2583–2601.
R.L.Sack and W. Patten ; Semiactive hydraulic structural control.’’Proc., Int. Workshop on Structural Control, USC Publication Number CE-9311 (1993), 417–431.
W.N.Patten,R. Sack and Q. He ; Controlled semiactive hydraulic vibration absorber for bridges.’’ Journal of Structural Engineering, (1996) 187– 192.
M.D.J. Symans and M.C. Constantinou ; Seismic testing of a building structure with a semiactive fluid damper control system, Earthquake Engineering Structure Dynamics, (1999) 759–777.
S. Nagarajaiah ; Fuzzy controller for structures with hybrid isolationsystem, Proc., 2nd World Conf. Structural Control, Wiley,New York, TA2 (1994) 67–76.
J. Yan, L.Cheng, Z.Y.Wu, L.H.Yam ; Development in vibration based structural damage detection technique, Elsevier, Mechanical System & Signal Processing (2006) 2198-2211.
Y.L.Xu, B. Chen ; Integrated vibration control and health monitoring of building structures using semi-active friction dampers: Part Imethodology, Elsevier, Engineering Structures, (2008) 1789-1901.
O.S.Salawu ; Detection of structural damage through changes in frequency: a review, Elsevier, Engineering Structures, (1994) 718- 723.
M. D. Symans and M.C. Constantinou ; Passive Fluid Viscous Damping Systems for energy dissipation, ISET Journal of Earthquake Technology (1998) 185-206.
Y.L.Xu and B.Chen ; Integrated vibration control and health monitoring of building structures using semi-active friction dampers: Part II-Numerical Investigation” Elsevier, Engineering Structures, (2008) 573-587.
SAP 2000 version 14.4, Computers and Structures, Berkeley, California, USA, 2010.
Anil K. Chopra ; Dynamics of Structures Theory and Applications to Earthquake Engineering, Third Edition, Pearson Education, 2007.
W. H. Lin and A. K. Chopra ; Earthquake Response of Elastic SDOF systems with nonlinear Fluid Viscous Dampers, Earthquake Engineering and Structural Dynamics.
Applied Technology Council ; FEMA 440 Improvement of Non-Linear static seismic analysis procedures”, 2000.
Peer.berkeley.edu/peer-ground-motiondatabase/site.
M. D. Symans, F. A. Charney ; FEMA Presentation on Seismic protective systems: Passive energy dissipation, presented at MBDSI in 2001and 2002.
Fundamental Concepts of Earthquake Engineering ; Luis Esteva (1980) Ch-17 “Seismic Code Provisions”, Vol.1, 753-923.
Q. S. Khan ; Application of vibration control in health monitoring of building structures, M.Sc. Thesis, CED, UET, Lahore (2011).
K. Kawashima and S. Unjoh ; Seismic response control of bridges by variable dampers, Journal of Structural Engineering (1994), 2583–2601.
R.L.Sack and W. Patten ; Semiactive hydraulic structural control.’’Proc., Int. Workshop on Structural Control, USC Publication Number CE-9311 (1993), 417–431.
W.N.Patten,R. Sack and Q. He ; Controlled semiactive hydraulic vibration absorber for bridges.’’ Journal of Structural Engineering, (1996) 187– 192.
M.D.J. Symans and M.C. Constantinou ; Seismic testing of a building structure with a semiactive fluid damper control system, Earthquake Engineering Structure Dynamics, (1999) 759–777.
S. Nagarajaiah ; Fuzzy controller for structures with hybrid isolationsystem, Proc., 2nd World Conf. Structural Control, Wiley,New York, TA2 (1994) 67–76.
J. Yan, L.Cheng, Z.Y.Wu, L.H.Yam ; Development in vibration based structural damage detection technique, Elsevier, Mechanical System & Signal Processing (2006) 2198-2211.
Y.L.Xu, B. Chen ; Integrated vibration control and health monitoring of building structures using semi-active friction dampers: Part Imethodology, Elsevier, Engineering Structures, (2008) 1789-1901.
O.S.Salawu ; Detection of structural damage through changes in frequency: a review, Elsevier, Engineering Structures, (1994) 718- 723.
M. D. Symans and M.C. Constantinou ; Passive Fluid Viscous Damping Systems for energy dissipation, ISET Journal of Earthquake Technology (1998) 185-206.
Y.L.Xu and B.Chen ; Integrated vibration control and health monitoring of building structures using semi-active friction dampers: Part II-Numerical Investigation” Elsevier, Engineering Structures, (2008) 573-587.
SAP 2000 version 14.4, Computers and Structures, Berkeley, California, USA, 2010.
Anil K. Chopra ; Dynamics of Structures Theory and Applications to Earthquake Engineering, Third Edition, Pearson Education, 2007.
W. H. Lin and A. K. Chopra ; Earthquake Response of Elastic SDOF systems with nonlinear Fluid Viscous Dampers, Earthquake Engineering and Structural Dynamics.
Applied Technology Council ; FEMA 440 Improvement of Non-Linear static seismic analysis procedures”, 2000.
Peer.berkeley.edu/peer-ground-motiondatabase/site.
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Published
2016-06-22
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Section
Civil Engineering,Structures, Construction, Geo technology, Water, Transportation
