The Effects of Using Different Seismic Bearing on the Behavior and Seismic Response of High-Rise Building

Saman Mansouri, Amin Nazari

Abstract


The effects of using different seismic bearings were investigated to reduce the seismic response of buildings by assuming the vulnerability of 20-story regular RC building in this paper. The method of this study was that the studied building was studied in three different models in terms of its connection to the foundation. In the first model, the structures were placed on the rigid bearing and in the second and third models; lead-rubber bearings and friction pendulum bearings were placed at the counter between the structure and foundation, respectively. Then, the dynamic analysis was used to assess the behaviour and seismic response of the mentioned models. The results of the study showed that the structures in the first model functioned like cantilever column that would become uniaxial and biaxial bending under the effects of earthquake around the vertical axis of structure. Due to the tensile (tension) weakness in concrete, seismic loads caused major cracks in the tension part of the structures according to the place of the neutral axis that could lead to the collapse of structure. In addition, the use of mentioned seismic bearings under the earthquake caused the structure like a semi-rigid box slid on this equipment that reduced the structure's stiffness and increased the period of the structure in comparison with the first model. Using the studied seismic bearings caused the displacement of the roof of the first and twentieth stories of the structure become approximately equal and prevented the creation of the bending moment in the first model. The results of non-linear time history analysis showed that using the studied seismic bearings caused the response of the structure reduced significantly when the structure was placed on rigid bearings. It could be very valuable regarding the limitation of the capacity of the structure's members.


Keywords


Seismic Retrofit; High-Rise Building; Lead-Rubber Bearings; Friction Pendulum Bearings.

References


Tehrani T, Maalek S. The use of passive dampers and conventional strengthening methods for the rehabilitation of an existing steel structure, 4th International Conference on Earthquake Engineering, Taipei, Taiwan, Paper No. 133, 2006.

Rahim Zadeh F, Zamani nouri A. Application of the base isolation method in seismic behaviour and retrofit of the 3D steel structure, The 4th National Conference on Civil Engineering, University of Tehran, Tehran, Iran, 2008.( In Persian).

Takahashi Y. Damage of rubber bearings and dampers of bridges in 2011 greast east japan earthquake, Proceedings of the International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake, Tokyo, Japan, 2012.

Torunbalci N, Ozpalanlar G. Earthquake response analysis of mid-story buildings isolated with various seismic isolation techniques, The 14th World Conference on Earthquake Engineering, Beijing, China, 2008.

Ashok S P, Mehta N, Wagh R, Padhiya M, Samare A, Patil Y. Response spectrum analysis of multi storeyed base-isolated building, International Journal of Civil, Structural Environmental and Infrastructure Engineering Research and Development, ISSN 2249-6866, 2012.

Amiri Yekta A, Razani R. Assessment of the seismic performance of short buildings with FPS on the spherical concave foundation, The 2th National Conference on Structure- Earthquake- Geotechnical, Mazandaran, Iran, 2012. (In Persian).

Mansouri S. An investigation of the effects of energy dissipation devices on the seismic behaviour retrofit of multiple-span reinforced concrete bridges, Department of Civil Engineering, «M.Sc» Thesis on Structural Engineering, Thesis Supervisor: DR. Shahrokh Maalek, Islamic Azad University, Dezful Branch, 2013. (In Persian).

Tolani S., Sharma A. Effectiveness of base isolation technique and influence of isolator characteristics on response of a Base isolated building, American Journal of Engineering Research, Volume-5, Issue-5, pp-198-209, 2016.

Ferraioli M., Mandara A. Base isolation for seismic retrofitting of a multiple building structure: evaluation of equivalent linearization method, mathematical problems in engineering, Volume 2016, Article ID 8934196, 17 pages, 2016.

Kalantari A, Taghi Khani T. Guideline for design and practice of base isolation systems in buildings (No. 523), Islamic Republic of Iran, Vice Presidency for Strategic Planning and Supervision, Office of Deputy for Strategic Supervision, Bureau of Technical Execution System, 2010. (In Persian).

Chen W F, Duan L. Bridge Engineering: Construction and Maintenance, CRC Press, Boca Raton London, New York Washington, D.C, Taylor & Francis Group, LLC, 2003.

Pinho, R. Nonlinear Dynamic Analysis of Structures Subjected to Seismic Action, Courses and Lectures- No. 494, advanced earthquake engineering analysis, Springer Wien New York, ISBN 978-3-211-74213-6, page 63-89, 2007.

Iranian cod of practice for seismic resistant design of building (standard 2800, 4th edition), road, housing and urban development research center, 2015.

Pakniyat, S. & Pakniyat, E. Essential Analyses for Seismic Rehabilitation of Structures. Published by Motefakeran, Tehran, Iran, 2011. (In Persian).


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