سال انتشار: ۱۳۹۰

محل انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله

تعداد صفحات: ۷

نویسنده(ها):

Seyed Mehdi Zahrai – Associate Professor Center of excellence for Management and Engineering of civil Infrastructures Department of Civil Engineering, Faculty of Engineering The Univ. of Tehran
Saeed Abbasi – Ph.D. Candidate, School of Civil Engineering, University of Tehran, Iran

چکیده:

Simulations conducted on single degree of freedom structures (SDOFs) connected rigidly to a tuned liquid damper (TLD) under various excitations show that TLD can reduce structural response to these excitations considerably if properly designed. A conventional TLD is generally tuned to a single frequency. Because of this limitation, the TLD usually is used to control the structural response of semi-SDOF structures. Overcoming this drawback, some standing baffles are suggested to be installed inside the TLD which can rotate around their vertical axis. Numerical simulations, validated by experimental works, show that using these baffles result an increase in damping ratio of TLD up to 20% while without baffles the damping ratio is 3%. Frequency of sloshing of inside water increases to about 3 Hz while without baffles it is almost 1 Hz. Results show that the rate of change in damping and frequency takes place in baffles orientation between 30 to 50 degrees and 40 to 50 degrees respectively