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Investigating the Performance of Tuned Mass Dampers in Controlling the Torsional Response of 3-D Steel Structural Models Under Earthquake Excitation

Bolorian Kord, Mohammad Navid | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 50235 (51)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Rahimzadeh Rofouei, Fayyaz
  7. Abstract:
  8. Existing structural irregularities (in plan and elevation) has always been among the important causes of structural failures under strong earthquakes. The torsional related damages have especially been very important in multi-story buildings as the torsional behavior of structures changes their uniform translational vibration and causes concentration of demands in the elements at the perimeter of the buildings. On the other hand, the Tuned Mass Dampers (TMD) have in general been accepted as an effective passive structural control device to suppress the structural vibration. In this study, Three 3-D, irregular (in plan) steel structural models with 4, 8 and 15 number of floors are considered to investigate the performance of a combination of 3 TMD placed at the top floor of buildings to control their response under earthquake excitation. The drift ratios as well as the story shear forces are considered as a measure for comparison purposes. Comprehensive nonlinear dynamic time history analyses are carried out for determination of the story drift and shear force. The results indicate the effectiveness of TMDs depends on the level of the eccentricity and by increasing elevation the performance of TMD is decreased. The CSI Sap2000 program is used for the design of the structural models, while OpenSees program is used for the dynamic analyses
  9. Keywords:
  10. Three Dimensional Structural Models ; Nonlinear Time History Analysis ; Tuned Mass Damper (TMD) ; Passive Control ; Irregular Structures ; Torsional Behavior

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