Simplified design guidelines for seismic base isolation in multi-storey buildings for Bangladesh National Building Code (BNBC)

Seismic base isolation is now a days moving towards a very efficient tool in seismic design of structure. Increasing flexibility of structure is well achieved by the insertion of these additional elements between upper structure and foundation as they absorb larger part of seismic energy. However in Bangladesh, this research is still young for building structures. Therefore, this is a burning question to design isolation device in context of Bangladesh. Effort has been made in this study to establish an innovative simplified design procedure for isolators incorporated in multi-storey building structures. Isolation systems namely lead rubber bearing (LRB) and high damping rubber bearing (HDRB) have been selected for the present schoolwork. Numerical formulation and limiting criteria for design of each element have been engendered. The suitability to incorporate isolation device for seismic control has been sight seen in details. The study reveals simplified design procedures for LRB and HDRB for multi-storey buildings in Bangladesh. The detail design progression has been proposed to be included in Bangladesh National Building Code (BNBC).    Key words: Seismic base isolation, simplified design, building structures, rubber bearing, response modification, base shear, yield force, shear modulus, damping.

[1]  Ken Yeh.  Adaptive fuzzy control for earthquake-excited buildings with lead rubber bearing isolation , 2012 .

[2]  Thomas H. Heaton,et al.  Long-Period Building Response to Earthquakes in the San Francisco Bay Area , 2008 .

[3]  Weiqing Liu,et al.  Stochastic Seismic Response and Reliability Analysis of Base-Isolated Structures , 2007 .

[4]  Fabio Casciati,et al.  Modelling the uncertainty in the response of a base isolator , 2008 .

[5]  Mohammed Jameel,et al.  Study on corollary of seismic base isolation system on buildings with soft storey , 2011 .

[6]  Costas P. Providakis,et al.  Effect of LRB isolators and supplemental viscous dampers on seismic isolated buildings under near-fault excitations , 2008 .

[7]  Heecheul Kim,et al.  Performance of a multi-story structure with a resilient-friction base isolation system , 2004 .

[8]  Syed Ishtiaq Ahmad,et al.  Seismic Base Isolation for Buildings in Regions of Low to Moderate Seismicity: Practical Alternative Design , 2012 .

[9]  José Rodellar,et al.  An innovative isolation device for aseismic design , 2009 .

[10]  James M. Kelly.  Earthquake Regulations for Seismically Isolated Structures , 1997 .

[11]  Izuru Takewaki,et al.  Resonant behaviour of base‐isolated high‐rise buildings under long‐period ground motions , 2006 .

[12]  Saiful Islam,et al.  Study on optimal isolation system and dynamic structural responses in multi-storey buildings , 2011 .

[13]  Mohammed Jameel,et al.  Seismic isolation in buildings to be a practical reality: Behavior of structure and installation technique , 2011 .

[14]  Murat Dicleli,et al.  Comprehensive evaluation of equivalent linear analysis method for seismic-isolated structures represented by sdof systems , 2007 .

[15]  Ioannis Koutromanos,et al.  Seismic response of base-isolated buildings including soil-structure interaction , 2009 .

[16]  R. S. Jangid.  Optimum lead–rubber isolation bearings for near-fault motions , 2007 .

[17]  Jiahao Lin,et al.  An Introduction to Seismic Isolation , 1993 .

[18]  Ging Long Lin,et al.  Predictive control of smart isolation system for precision equipment subjected to near-fault earthquakes , 2008 .

[19]  Farzad Naeim,et al.  Design of seismic isolated structures : from theory to practice , 1999 .

[20]  Mohd Zamin Jumaat,et al.  Engendering earthquake response spectra for Dhaka region usable in dynamic analysis of structures , 2011 .

[21]  Marios C. Phocas,et al.  EARTHQUAKE ISOLATOR WITH PROGRESSIVE NONLINEAR DEFORMABILITY , 2007 .

[22]  Mohd Zamin Jumaat,et al.  Earthquake time history for Dhaka, Bangladesh as competent seismic record , 2011 .

[23]  Abbas Abbaszadeh Shahri,et al.  Nonlinear site response evaluation procedure under the strong motion: A case study of Miyaneh, Azarbayjan Sharghi Province, Iran , 2010 .

[24]  Alessandro Baratta,et al.  Optimal design of base-isolators in multi-storey buildings , 2004 .

[25]  S. Wilkinson,et al.  A non-linear response history model for the seismic analysis of high-rise framed buildings , 2006 .

[26]  A. Colaiuda,et al.  Investigation upon the dynamic structural response of a nuclear plant on aseismic isolating devices , 2001 .

[27]  Andrea Dall'Asta,et al.  Nonlinear behavior of dynamic systems with high damping rubber devices , 2008 .

[28]  Andrea Dall'Asta,et al.  Experimental tests and analytical model of high damping rubber dissipating devices , 2006 .

[29]  Sajal K. Deb,et al.  Seismic base isolation : An overview , 2004 .