Tuned Liquid Dampers
Upcoming SlideShare
Loading in...5
×
 

Tuned Liquid Dampers

on

  • 1,128 views

 

Statistics

Views

Total Views
1,128
Views on SlideShare
1,128
Embed Views
0

Actions

Likes
0
Downloads
18
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Tuned Liquid Dampers Tuned Liquid Dampers Presentation Transcript

    • TUNED LIQUIDDAMPERS
    • LATERAL LOAD RESISTANCE structural modifications aerodynamic modifications base isolation techniques damping sources
    • STRUCTURALMODIFICATIONSOutrigger system Belt bandage system
    • AERODYNAMICMODIFICATIONSFins Chamfered corners
    • BASE ISOLATIONElastomeric bearings Sliding bearings
    • DAMPING SOURCES structural aerodynamic soil auxiliary
    • WHY AUXILIARY SOURCES? very less contribution of other sources difficulty in estimation adverse effects predictable & reliable
    • AUXILIARY SOURCES active passivetuned liquid dampers semi active
    • TUNED LIQUID DAMPERS rectangular orcylindricalcontainer liquid stored isusually water sloshing waterdissipatesenergy wind inducedvibrations
    • TUNING tuned to the natural frequency of thestructure achieved by adjusting the dimensions frequency equation
    • EFFICIENCY amplitude dependent placing on top floor floater beads torsion springs screens and baffles
    • ADVANTAGES low installation cost no moving parts low operation and maintenance cost frequency can be controlled by adjustingheight resistance against wind & earthquake temporary use
    • TYPES OF TLDsTLDTSDshallow deepTLCDLCVA DTLCD HTLCD PTLCDCTLD
    • TUNED SLOSHING DAMPERS single or a group of liquid storedcontainers shallow and deep based on the ratio of depth of water tothat of the length in direction of vibration diameter in case of circular tanks < 0.15 shallow > 0.15 deep
    • TSDs (contd:) shallow TSDs has larger amplitude ofsloshing better damping at smaller vibrations non linear behavior at large scalevibrations deep TSDs linear behavior even underlarger excitations water can be used for fire fighting andemergency supply
    • APPLICATIONTSD unit Shin Yokohama Prince Hotel
    • TUNED LIQUID COLUMNDAMPERS liquid stored in interconnected tubes an orifice provided in between motion of liquid mass in the tube pressure drop due to orifice unidirectional nature double TLCD
    • TLCDs (contd) shape advantage known behavior extra control bydictating orificedimensions active control LCVA, HTLCD
    • APPLICATIONCross section One Wall Center
    • CONTROLLABLE TLDs
    • CONCLUSIONS Effective against both wind andearthquake TSDs suited for small scale excitations TLCDs are much more advantageous Control can be exercised for furtherefficiency, but costly.