"SEISMIC ANALYSIS OF SLAB BRIDGE- AN EXPERIMENTAL APPROACH USING SHAKE TABLE"

Authors

Shaik Kabeer Ahmed , Chandradhara.G.P, Giddappaji.N.S & Sundip Shenoy.R
Department of Civil Engineering N.M.A.M. INSTITUTE OF TECHNOLOGY Nitte, Karkala Taluk, Udupi Dist, Karnataka, India.

Abstract

Seismic analysis is a tool for the estimation of structural response in the process of designing earthquake resistant structures and or retrofitting vulnerable existing structures. In this present study seismic analysis of slab Bridge model is done. A simple slab bridge is considered and it is scaled down as a SDOF lumped mass model. Seismic analysis is done using horizontal type shake table by simulating earthquake similar ground motions. Each Model is checked for the vibration and resonance using Dewesoft Data Acqusition system software while testing on shake table. Each model’s natural frequencies for vibration is found out using Dewesoft Data Acqusition System through accelerometer sensors. Dynamic analysis of models are done considering it as thin element in ETABS and its modes, time periods and frequencies are compared with data acquisition systems software’s results and manual calculation results. Calibration of sensors is done using free vibration test and validation was done by doing analysis in Midas Civil Software