DIMINISHING SEISMIC EFFECT ON BUILDINGS USING BEARING ISOLATION

Authors

  • A. B. M. Saiful Islam Department of Civil & Construction Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam 31451, Saudi Arabia

DOI:

https://doi.org/10.31436/iiumej.v19i1.844

Abstract

Adopting suitable seismic protection techniques is presently a foremost concern worldwide and has become a governing principle in the growing construction industry globally. Thus, a rapid upsurge in infrastructure development in seismic-prone areas requires proper treatment for building structures. Therefore, the aim of the study is to incorporate a rubber bearing isolation device in a building base in order to diminish the seismic effect on the superstructure. The changes of structural parameters and responses of fixed-based buildings for applying High Damping Rubber Bearing (HDRB) are investigated under site-specific ground excitation. Twenty representative buildings have been used to examine the responses employing four types of HDRB systems. The study reveals that the HDRB makes the structure more flexible, offering reduced structural responses. The introduction of HDRB may help to decrease floor moment by 31~55%, which can allow the structures to withstand comparatively high seismic tremors safely and efficiently. The base isolated structures experience significant lateral shift between 87.15 and 130.15 mm, and relative floor displacement is below 3% because of additional flexibility. The effective inertia height for the BI buildings remains under two-thirds of building elevation showing triangular distribution concentrating to the top story level. The reduction in forces, moments, and relative displacements of the structural members by applying HDRB can ensure economic design and higher structural safety against seismic excitation.

ABSTRAK: Penerapan teknik yang sesuai bagi pelindungan gelombang seismos menjadi penekanan semasa di seluruh dunia dan telah menjadi prinsip penentu dalam industri pembinaan secara global. Oleh itu, kenaikan yang cepat dalam pembangunan infrastuktur dalam kawasan terdedah kepada gelombang seismos memerlukan penyelenggaraan yang betul bagi struktur bangunan. Jadi, matlamat kajian ini adalah bagi menggabungkan getah alat pengandar asing dalam teras bangunan bagi mengurangkan kesan seismos pada struktur asas. Perubahan pada parameter struktur dan tindak balas tapak-tetap bangunan bagi penggunaan teknik High Damping Rubber Bearing (HDRB) dikaji di bawah setiap kenaikan getaran gelombang sebenar bawah tanah. Dua puluh bangunan telah digunakan bagi menilai tindak balas terhadap penggunaan empat jenis sistem HDRB. Kajian menunjukkan HDRB membuatkan struktur lebih fleksibel, dan mengurangkan tindak balas terhadap struktur. Penggunaan HDRB dalam pembangunan membantu mengurangkan momen lantai sebanyak 31~55%, di mana struktur bangunan lebih tahan terhadap gegaran tinggi secara selamat dan berkesan. Struktur asas yang terasing mengalami peralihan sisi yang ketara antara 87.15 dan 130.15 mm, dan anjakan lantai relatif di bawah 3% dengan penambahan sistem fleksibel ini. Ketinggian inertia berkesan bagi bangunan BI kekal di antara dua pertiga ketinggian bangunan. Ini menunjukkan pengagihan segitiga tertumpu pada aras atas bangunan. Pengurangan pada daya, momen dan perubahan relatif struktur menggunakan HDRB dapat memastikan reka bentuk lebih ekonomi dan selamat pada bangunan tinggi daripada sebarang gelombang seismos.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Author Biography

A. B. M. Saiful Islam, Department of Civil & Construction Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam 31451, Saudi Arabia

Department of Civil & Construction Engineering, College of Engineering, Imam Abdulrahman  Bin Faisal University, Dammam 31451, Saudi Arabia

References

[1] Ismail M, Rodellar J, Ikhouane F. (2010) An innovative isolation device for aseismic design. Engineering Structures, 32:1168-83.
[2] Islam ABMS, Hussain RR, Jumaat MZ, Rahman MA. (2013) Nonlinear dynamically automated excursions for rubber-steel bearing isolation in multi-storey construction. Automation in Construction, 30:265-75.
[3] Islam ABMS, Jameel M, Jumaat MZ, Rahman MM. (2013) Optimization in structural altitude for seismic base isolation at medium risk earthquake disaster region. Disaster Advances, 6:23-34.
[4] Dicleli M, Buddaram S. (2007) Comprehensive evaluation of equivalent linear analysis method for seismic-isolated structures represented by sdof systems. Engineering Structures, 29:1653-63.
[5] Islam ABMS, Jameel M, Uddin MA, Jumaat MZ. (2012) Competent Building Elevation for Incorporating Base Isolation in Aseismic Structure. Procedia Engineering, 50:882-92.
[6] Tornello ME, Sarrazin M. (2012) Base-isolated building with high-damping spring system subjected to near fault earthquakes. Earthquakes and Structures, 3:315-40.
[7] Bhuiyan AR, Okui Y, Mitamura H, Imai T. (2009) A rheology model of high damping rubber bearings for seismic analysis: Identification of nonlinear viscosity. International Journal of Solids and Structures, 46:1778-92.
[8] Markou AA, Manolis GD. (2016) Mechanical models for shear behavior in high damping rubber bearings. Soil Dynamics and Earthquake Engineering, 90:221-6.
[9] Alhan C, Gazi H, KurtuluÅŸ H. (2016) Significance of stiffening of high damping rubber bearings on the response of base-isolated buildings under near-fault earthquakes. Mechanical Systems and Signal Processing, 79:297-313.
[10] Islam ABMS, Hussain RR, Jameel M, Jumaat MZ. (2012) Non-linear time domain analysis of base isolated multi-storey building under site specific bi-directional seismic loading. Automation in Construction, 22:554-66.
[11] CSI. (2004) Linear and nonlinear static and dynamic analysis of three-dimensional structures Computer & Structures Inc. SAP 2000. Berkeley (CA).
[12] Kelly TE, Robinson WH, Skinner RI. (2006) Seismic Isolation for Designers and Structural Engineers: Robinson seismic Ltd.
[13] Islam ABMS, Ahmad SI, Jumaat MZ, Hussain RR, Rahman MA, Darain KM. (2014) Efficient design in building construction with rubber bearing in medium risk seismicity: case study and assessment. Journal of Civil Engineering and Management, 20:621-31.
[14] Cheng FY, Jiang H, Lou K. (2008) Smart structures: innovative systems for seismic response control: CRC Press.
[15] Uniform Building Code (UBC). (1997) Earthquake regulations for seismic isolated structures International conference of building officials. Whitter (CA,USA).
[16] Islam ABMS, Jameel M, Ahmad SI, Salman FA, Jumaat MZ. (2011) Engendering earthquake response spectra for Dhaka region usable in dynamic analysis of structures. Scientific Research and Essays, 6:3519-30.
[17] Deb S. (2004) Seismic base isolation-an overview. Current Science, 87:1426-30.

Downloads

Published

2018-06-01

How to Cite

Islam, A. B. M. S. (2018). DIMINISHING SEISMIC EFFECT ON BUILDINGS USING BEARING ISOLATION. IIUM Engineering Journal, 19(1), 59–71. https://doi.org/10.31436/iiumej.v19i1.844

Issue

Section

Civil and Environmental Engineering

Most read articles by the same author(s)