Suppression of wind-induced response of tall buildings by using a tuned mass damper made of multi-stage steel-laminated rubber bearings | |
| Author | Chanon Chotmanee |
| Call Number | AIT Thesis no.ST-22-01 |
| Subject(s) | Tuned mass dampers Tall buildings--Design and construction Wind-pressure |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | A systematic procedure for designing TMD for tall buildings is developed in this study. The wind-pressure time history is integrated to the FEM of the benchmark building. A full finite element models (Full Model) was constructed to incorporate the modal properties, stiffness, and summary of mass of the building. The response of the building is simplified to 3 DoF in each floor level and a 2 DoF representing the two-directional translation movement of TMD model is introduced. The governing equation representing a 5DoF which represents the response interaction between the building and TMD—called Reduced Model is then formulated. The building responses thus obtained using the Reduced Model were found identical to those from the Full Model. Thus, the Reduced Model developed in this study is used in subsequent analysis to evaluate and study the optimal parameters of the TMD. The Reduced Model is employed the study the linear behavior of TMD. It is configured to account for the different TMD locations due to the limitations of the structural configuration system. Moreover, the reduced model considering the effect of three-dimensional coupled modes is transformed and mapped onto the form of classical lumped mass 2DoF system. The concept of transformation is employed to obtain the simple closed-form formulas for tuning TMD. Thus, the effectiveness of TMD from the optimal tuning parameters is evaluated. Furthermore, the Reduced Model is modified to study softening effect of TMD predicted by cubic nonlinearities model from theory of nonlinear oscillations. Because the TMD displacement response is small compared to its actual displacement capacity, only a nominal change was obtained from the NLTMD model compared to the LTMD. The NLTMD damping ratio and optimal frequency ratio values were evaluated, and the results were in good agreement with the values obtained from LTMD, thus concluding the fact that the Reduced model can sufficiently represent the behavior of TMD using the multi-stage steel laminated rubber bearings. |
| Year | 2022 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai |
| Examination Committee(s) | Anwar, Naveed;Punchet Thammarak |
| Scholarship Donor(s) | His Majesty the King's Scholarships (Thailand) |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2022 |