DESIGN AND DEVELOPMENT OF SHAKE TABLE
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1.1 INTRODUCTION
Explore earthquake hazards and damage to buildings by constructing model buildings and
subjecting the buildings to ground vibration (shaking similar to earthquake vibrations) on a
small shake table. CIVIL constructions and engineering structures are designed to withstand a
variety of operational loads and environ-mental conditions over decades of safe and economic
usage. Earthquakes are part of this environment. Apart from destruction of life and property,
they can have serious indirect consequences.
The exact simulation of earthquake motion has been a serious challenge to researchers and
engineers. Shake table testing is being increasingly used in earthquake engineering research
centers worldwide, as it is the only available means of nearly truly reproducing the dynamic
effects that earthquakes impose on structures. A relatively simple system has been assembled
with care to ensure an adequate replication of input motion by the shake table system. Subjective
comparisons of input signal vs shake-table response, in both time and frequency domain have
been utilized to provide a measure of the capabilities of the simulator to reproduce earthquake
motions scaled according to similitude laws. This report discusses briefly various components of
the shake table, its assembly and the investigations that were carried out to provide specific
insights into its response characteristics.
A structure in the vicinity of an earthquake will experience random vibrations caused by the
movement of its foundation. One may assume similar response if the base of the structure is
shaken in a laboratory environment using the acceleration – time history recorded during the
earthquake. By the same token, laboratory reproduction of associated displacement – time
history would also have the same effect. This is the basis for the application of two-axis shake
table to earthquake simulation.
Designing of a shaking table which produces vibrations in horizontal as well as in vertical
direction. This is used for the analysis of the vibrations in a structure at the time of earthquake.
Architects and engineers run simulations using models and shake tables to test the integrity of
buildings and determine necessary reinforcements and to study dynamic structural behavior.
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DESIGN AND DEVELOPMENT OF SHAKE TABLE - by smart paper boy - 21-06-2011, 03:13 PM

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