Study on optimal isolation system and dynamic structural responses in multi-storey buildings

Seismic base isolation systems have been investigated in this study to be acquainted with the optimized insertion in multi-storey buildings. Two extensively exploited isolator types, namely, lead rubber bearing (LRB) and high damping rubber bearing (HDRB) are incorporated to examine their effect for buildings. Both time history and response spectrum based non linear finite element analyses are conducted using SAP 2000 program as analysis tool. Isolators are designed as per UBC code. Bidirectional site specific earthquake records have been used as seismic load. Analyses results show that isolation system considerably reduce earthquake induced load on building. Furthermore, method of analysis has been found to have considerable effect on the response of low to medium rise buildings. Time history analysis shows significant less base shear than that from response spectrum analysis. Also, less isolator displacement is obtained from time history analysis than that from response spectrum analysis. Considering isolator displacement and base shear, HDRB is found to be better of the two types of isolators adopted in this study. Nevertheless, LRB is stumbled on to be more effectual in reducing individual floor acceleration and thereby reducing non structural damages.

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

[2]  Petros Komodromos,et al.  Simulation of the earthquake-induced pounding of seismically isolated buildings , 2008 .

[3]  Katsuyuki Shibata,et al.  Progress of a research program on seismic base isolation of nuclear components , 2000 .

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

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

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

[7]  Can Balkaya,et al.  Nonlinear seismic response evaluation of tunnel form building structures , 2003 .

[8]  Ronald L. Mayes,et al.  Seismic Isolation: History, Application, and Performance—A World View , 1990 .

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

[10]  R. S. Jangid,et al.  Behaviour of Base-Isolated Structures with High Initial Isolator Stiffness , 2009 .

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

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

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

[14]  R. Clough,et al.  Dynamics Of Structures , 1975 .

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

[16]  Hyun-Su Kim,et al.  GA-fuzzy control of smart base isolated benchmark building using supervisory control technique , 2007, Adv. Eng. Softw..

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

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

[19]  John M. Niedzwecki,et al.  Earthquake induced pounding in friction varying base isolated buildings , 2007 .

[20]  C. Loh,et al.  Time Domain Identification of Frames under Earthquake Loadings , 2000 .

[21]  Eric M. Lui.  Seismic Isolation for Earthquake Resistant Structures , 2001 .

[22]  Alessandro Contento,et al.  Seismic response of a non-symmetric rigid block on a constrained oscillating base , 2010 .

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

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

[25]  Panayiotis C. Polycarpou,et al.  Earthquake-induced poundings of a seismically isolated building with adjacent structures , 2010 .

[26]  Kyu-Sik Park,et al.  A comparative study on aseismic performances of base isolation systems for multi-span continuous bridge , 2002 .

[27]  M.Y.H. Bangash,et al.  Dynamic Finite Element Analysis of Structures , 2010 .

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

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

[30]  T. K. Datta,et al.  Performance of base isolation systems for asymmetric building subject to random excitation , 1995 .

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

[32]  Stefan Hurlebaus,et al.  Evaluation of the performance of a sliding-type base isolation system with a NiTi shape memory alloy device considering temperature effects , 2010 .

[33]  Vojko Kilar,et al.  Seismic behaviour of asymmetric base isolated structures with various distributions of isolators , 2009 .

[34]  A. Claret,et al.  Dynamic Analysis of Nonproportional Damping Structural Systems Time and Frequency-Domain Methods , 2001 .

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

[36]  Marios C. Phocas,et al.  Response of seismically isolated buildings considering poundings , 2007 .

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

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

[39]  Yoshiaki Okui,et al.  A rheology model of high damping rubber bearings for seismic analysis: Identification of nonlinear viscosity , 2009 .

[40]  Vasant Matsagar,et al.  Influence of isolator characteristics on the response of base-isolated structures , 2004 .

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

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

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