IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 04 | Apr-2015, Available @ http://www.ijret.org 495 SEISMIC COMPARATIVE STUDY ON TMD STRUCTURE: AN OVERVIEW Paramanna B Patil 1 , Chethan Kumar B 2 1 Post Graduate Student, Structural Engineering, VijayaVittala Institute of Technology, Bangalore 2 Assistant Professor, Structural Engineering, VijayaVittala Institute of Technology, Bangalore Abstract In larger context of civil engineering use of mechanical vibration control device is very often in present days, so this paper will provide the successful implementation specification of TMD to reduce the vibration induced due earthquake ground motion, with computer stimulated model & dynamic responses are obtained for seismic loading with & without TMD which drastically reduces seismic response such as lateral displacement, story drift, base shear, overturning moment. Even actual behavior study on structure has been carried by inducing ground motion to the structure by considering time history data of El-Centro & recent earthquake (2014) which happened in India. Keywords: TMD, Time History, Base Shear, Story Drift, El-Centro etc… --------------------------------------------------------------------***---------------------------------------------------------------------- 1. INTRODUCTION It is interesting to note that the use of active and passive devices is practice since from 1999 in India with first successful installation in killari village after suffering great loss of life and money due to earthquake caused in the year 1993. The base isolator is very firstly introduced in killari village for the single story building. Coincidently building is located very near to the location ofKillari Earthquake epicenter.Again second application is done to hospital building by learning lesson after great loses in life from 2001 Bhuj earthquake in Gujarat. All though there is no section related to analysis, design implementation provisions are not available in IS codes except some special draft prepared by GSDMA. So this paper made an attempt to study how the energy absorbing device (TMD) can perform during earthquake. 2. BUILDING DESCRIPTION Symmetrical plan building (G+4) has been considered for the present study, Design has been carried for the vertical load combination, which is having 2 bay along both X & Y axis along with 6m spacing in each grid, story height of 3m, grade of concrete=M25, poisons ratio as 0.15. Numerical Formulation TMD:TMD can be modeled as spring mass system with three primary elements; a mass, a spring & a damper. Several authors has given the numerical stimulation technique in which Prof.Hartog’s (1947) made remarkable mathematical formulation which is well known and it was adopted all over with certain limitations. 3. EARTHQUAKE TIME HISTORY Earthquake time history file includes information such as origin time of earthquake which happened on that particular station where we are recording responses along with longitude, latitude, magnitude, station height, depth, site classification based on shear wave velocity, maximum acceleration, duration of time, sampling rate. Usually acceleration data of Indian earthquake will be measured in terms of cm/sec2. Some of the researchers are interested to converter this data in terms of acceleration due to gravity (g) i.e. 0.2g,0.3g,0.4g by amplifying recorded ground motion. Table 1 gives some insight knowledge into the ground motion data study. Table-1: Time History Data File Information. Latitude 27.6 N 28.6 N Longitude 76.7 E 77.0 E Depth (Km) 13 20.3 Magnitude 3.9 4.3 Region ALWAR- RAJASTHAN DELHI- HARYANA- BORDER- REGION Station Code ALW REW Station Height(m) 289 246 Site Class A C Record Time 29.11.2006 05:41:05.554 25.11.2007 23:12:26.524 Sampling Rate 200. Hz 200. Hz Record Duration 31.130 Sec. 33.530 Sec. Direction Vertical Vertical Max. Acceleration( cm/sec2) 51.705 -12.246