Seismic Rehabilitation of 10-Story Steel Building by Adding an Isolated Story at Roof Level

Document Type : Research Paper


1 Assistant Professor, Department of Civil Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran

2 M.Sc., Department of Civil Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran

3 Ph.D., Department of Civil Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran


The application of seismic isolators at the base or mid stories by employing the mechanism of tuned mass dampers (TMDs) in structures provides an effective seismic control method for buildings. In this study, three prototypes of 10-story steel moment-resisting frame structures with intermediate ductility that are designed in accordance with second and fourth editions of Iranian Seismic Design Code (Standard No. 2800) as well as the second edition with one story on seismic isolator at the last floor were designed and modelled using nonlinear static pushover and nonlinear dynamic time history analyses under three far-fault earth‎quakes. The results were presented in the form of pushover curves and time history of roof displacement, base shear, maximum drift and roof acceleration of stories to compare the seismic enhancement of roof-level isolating technique and the effectiveness of the seismic criteria of Standard No. 2800. The results of research indicated that adding on isolated story at roof level had a significant effect on decreasing the drift of the stories. This reduction for the designed structure based on the second edition of Standard No. 2800 is down to an average maximum of 25%. In addition, using seismic isolators reduces the base shear by 30%. The decrease in the amount of roof displacement is also 40%. Also, the results showed that the efficiency of isolated story application as the last story to reduce the damage.


Main Subjects

1- Whipp, K. P., 2005, Structural control by induced stress based stiffness modification, Doctoral dissertation, Vanderbilt University
2- Ahmadi, G., 1995, Overview of base isolation, passive and active vibration control strategies for aseismic design of structures, Scientia Iranica, 2, 2, 99-116.
3- Inaudi, J. A., and Kelly, J. M., 1993, Optimum damping in linear isolation systems, Earthquake engineering & structural dynamics, 22, 7, 583-598.
4- Saberi V., saberi H., and Sadeghi A., 2020, Collapse Assessment of Steel Moment Frames Based on Development of Plastic Hinges, Amirkabir Journal of Civil Engineering. (In Persian).
5-Rabinson, W. H., 1982, Leadrubber hysteretic bearings suitable for protecting structures during earthquakes, Earthq. Eng. Struct. Dyn., 10, 593–604.
6- Frahm, H., 1909, Devices for Damping Vibrations of Bodies, U.S. Patent, No. 989985.
7- Mahendra, P. S., and Sarbjeet, S., and Luis, M. M., 2002, Tuned Mass Dampers for Response Control of Torsional Building, Earthq. Eng. Struct. Dyn., 31, 749-769.
8- Den Hartog, J. P., 1940, Mechanical Vibration, 1st Edition, New York: Mcgraw-HiLL.
9-Pinkaew, T., Lukkunaprasit, P., and Chatupote, P., 2003, Seismic effectiveness of tuned mass dampers for damage reduction of structures, Engineering Structures, 25, 1, 39-46.
10- Ras, A., and Boumechra, N., 2017, Dissipation’s Capacity Study of Lead–Rubber Bearing System in Seismic Steel Structures Design, Arabian Journal for Science and Engineering, 42, 9, 3863-3874.
11- Petit, F., Loccufier, M., and Aeyels, D., 2009, On the Attachment Location of Dynamic Vibration Absorbers. Journal of Vibration and Acoustics, American Society of Mechanical Engineers (ASME), 131, 3, 1-8.
12- Moon, K. S., 2010, Vertically distributed multiple tuned mass dampers in tall buildings: performance analysis and preliminary design, The Structural Design of Tall and Special Buildings, 19, 3, 347-366.
13- Farshidianfar, A., and Soheili, S., 2013, Ant colony optimization of tuned mass dampers for earthquake oscillations of high-rise structures including soil–structure interaction, Soil Dynamics and Earthquake Engineering, 51, 14-22.
14- Kato, H., Mori, T., Murota, N., & Kikuchi, M., 2015, Analytical Model for Elastoplastic and Creep-Like Behavior of High-Damping Rubber Bearings, Journal of Structural Engineering, 141, 9, 04014213.
15- Hedayati Dezfuli, F., and Alam, M., 2014, Performance-based assessment and design of FRP-based high damping rubber bearing incorporated with shape memory alloy wires, Engineering Structures, 61, 166-183.
16- Chen, X., Yang, H., Shan, J., Hansma, P., and Shi, W., 2016, Bio-Inspired Passive Optimized Base-Isolation System for Seismic Mitigation of Building Structures, Journal of Engineering Mechanics, 142, 1, 04015061.
17- Hussan, M., Rahman, M. S., Sharmin, F., Kim, D., and Do, J., 2017, Multiple tuned mass damper for multi-mode vibration reduction of offshore wind turbine under seismic excitation, Ocean Engineering, 160, 449-460.
18- Govardhan, Paul, D., 2016, Effect of Lead in Elastomeric Bearings for Structures Located in Seismic Region, Procedia Technology, 25, 146-153.
19- Cancellara, D., and De Angelis, F., 2017, Assessment and dynamic nonlinear analysis of different base isolation systems for a multi-storey RC building irregular in plan, Computers & Structures, 180, 74-88.
20- Bayat, A., Beiranvand, P., and Ashrafi, H. R., 2018, Vibration Control of Structures by Multiple Mass Dampers, Jordan Journal of Civil Engineering, 12, 3, 461-471.
21- Akhlagh pasand, A., Fatollah pour, A., and Zahrai, S., 2019, Comparing performance of TMD and MTMD vertically distributed in height for multi-modal seismic control of tall buildings, Amirkabir Journal of Civil Engineering, 52, 10, 12-21.
22- Mehdizadeh, K., Hashemi, S., Sadeghi, A., and Shobeyrii, G., 2020, Investigation of the Base Isolation in Improving the Behavior of Steel Buildings subjected to Earthquakes applied with Different Angles, Quartery Specialized Journal of Structural Engineering, 17, 3, 1-12.
23- BHRC., 1999, Iranian code of practice for seismic resistant design of buildings, Tehran: Building and Housing Research Centre, Standard No. 2800, 2nd edition. (In Persian).
24- BHRC., 2014, Iranian code of practice for seismic resistant design of buildings, Tehran: Building and Housing Research Centre, Standard No. 2800, 4th edition. (In Persian).
25- INBC., 2013, Design Loads for Buildings, Tehran: Ministry of Housing and Urban Development, Iranian National Building Code, Part 6. (In Persian).
26- INBC., 2013, Design and Construction of Steel Structures, Tehran: Ministry of Housing and Urban Development, Iranian National Building Code, Part 10. (In Persian).
27- Code 523., 2010, Guideline for Design and Practice of Base Isolation Systems in Buildings, Office of Deputy for Strategic Supervision Bureau of Technical Execution System.
28- American Society of Civil Engineers (ASCE7), 2010, Minimum Design Loads for Buildings and Other Structures, pp.7.
29- Hu, J.W., 2014, Response of Seismically Isolated Steel Frame Buildings with Sustainable Lead-Rubber Bearing (LRB) Isolator Devices Subjected to Near-Fault (NF) Ground Motions, Sustainability, 7, 1, 111-137.
30- HAZUS-MH MR1., 1999, Advanced Engineering Building Module, Federal Emergency Management Agency.
31-FEMA 356. 2000, Pre-Standard and Commentary for the seismic Rehabilitation of Buildings, Washington D.C. Federal Emergency Management Agency, USA.
32- Hosseini, M. and Fanaei, N., 2013, Application of OpenSees software in modeling and analysis of structures, Tehran: rahian arshad.
33- CSI, ETABS., 2016, V-16.2. 2.0: Integrated finite element analysis and design of structures basic analysis reference manual. Computers and Structures Inc.
34- Next Generation Attenuation of Ground Motion (Nga) Project, 2006, http://Peer. Berkeley. Edu\nga\(Accessed 10 October 2006).
35- ­SeismoSignal., 2018, constitutes a simple, yet efficient, package for the processing of strong-motion data.