| Author | Malhotra, Praveen K. |
| Call Number | AIT Thesis no.ST-87-17 |
| Subject(s) | Bridges, Cable-stayed
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The effectiveness of tuned mass dampers (TMDs) in reducing the dynamic response under wind action is studied . The effect of a TMD on
modes, other than the one to which it is tuned, is investigated. Optimum
tuning parameters after Den Hartog are used. The analysis of the whole
system, with a TMD attached is carried out using the mode superposition
method . Non-proportional damping leads to complex-valued mode shapes and
eigenfrequencies.
The first part of the present study deals with: (i) replacement of
one large TMD by several small TMDs; (ii) effect of single or several.
TMDs, tuned to a mode, on other vibration modes ; (iii) design of UlDs for
more than one vibration mode; and (iv) effect of spatial location of nms.
The second part deals with the effectiveness of a TMD in reducing
the flexural and torsional response of a cable-stayed bridge under
vortex-shedding and turbulent wind. The effectiveness of a TMD in increasing the f lutter velocity is investigated. The analysis reveals that
oscillations in bridge deck due to vortex-shedding can be completely
suppressed in some cases . The response under turbulent wind is reduced
by 35 % and the flutter velocity raised by 15 % for the case considered . |
| Year | 1987 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Wireland, Martin
|
| Examination Committee(s) | Gupta, Satyendra P. ;Pichai Nimityongskul
|
| Scholarship Donor(s) | The Royal Netherlands Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |