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논문 기본 정보

자료유형
학술저널
저자정보
A. B. M. Saiful Islam (Imam Abdulrahman Bin Faisal University) Walid A. Al-Kutti (Imam Abdulrahman Bin Faisal University)
저널정보
한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.21 No.5
발행연도
2018.1
수록면
495 - 504 (10page)

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초록· 키워드

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The possibility of earthquakes in vulnerable regions indicates that efficient technique is required for seismic protection of buildings. During the recent decades, the concept is moving towards the insertion of base isolation on seismic prone buildings. So, investigation of structural behavior is a burning topic for buildings to be isolated in base level by bearing device. This study deals with the incorporation of base isolation system and focuses the changes of structural responses for different types of Lead Rubber Bearing (LRB) isolators. A number of sixteen model buildings have been simulated selecting twelve types of bearing systems as well as conventional fixed-base (FB) scheme. The superstructures of the high-rise buildings are represented by finite element assemblage adopting multi-degree of freedoms. Static and dynamic analyses are carried out for FB and base isolated (BI) buildings. The dynamic analysis in finite element package has been performed by the nonlinear time history analysis (THA) based on the site-specific seismic excitation and compared employing eminent earthquakes. The influence of the model type and the alteration in superstructure behavior of the isolated buildings have been duly assessed. The results of the 3D multistory structures show that the lateral forces, displacement, inertia and story accelerations of the superstructure of the seismic prone buildings are significantly reduced due to bearing insertion. The nonlinear dynamic analysis shows 12 to 40% lessening in base shear when LRB is incorporated leading to substantial allowance of horizontal displacement. It is revealed that the LRB isolators might be potential options to diminish the respective floor accelerations, inertia, displacements and base shear whatever the condition coincides. The isolators with lower force intercept but higher isolation period is found to be better for decreasing base shear, floor acceleration and inertia force leading to reduction of structural and non-structural damage. However, LRB with lower isolator period seems to be more effective in dropping displacement at bearing interface aimed at reducing horizontal shift of building structure.

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참고문헌 (42)

참고문헌 신청
Sevket Ates / 2012 / Investigation of effectiveness of double concave friction pendulum bearings / Computers and Concrete, An International Journal 9(3):195~213 dbpia Sevket Ates / 2011 / Site-response effects on RC buildings isolated by triple concave friction pendulum bearings / Computers and Concrete, An International Journal 8(6):693~715 google schola Avossa, A.M. / 2017 / Damping effects on the seismic response of base-isolated structures with lrb devices / Ingegneria Sismica 34(2):3~30 google schola Casciati, F. / 2008 / Modelling the uncertainty in the response of a base isolator / Probab. Eng. Mech. 23(4):427~437 Crossref Zhi-Yi Chen / 2016 / Seismic performance and optimal design of framed underground structures with lead-rubber bearings / Structural Engineering and Mechanics, An Int＇l Journal 58(2):259~276 dbpia

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