| Author | Parvez, Shah Mustaque |
| Call Number | AIT Thesis no.ST-87-23 |
| Subject(s) | Bridges--Earthquake effects
|
| 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 proposed Jamuna Bridge in Bangladesh will be the longest
multi-span cable-stayed bridge in the world when it is completed. This
study deals with the earthquake behaviour of four different types of
multi-span cable-stayed bridge systems for the proposed Jamuna Bridge,
i.e. a continuous bridge; a bridge with moment hinge in center of alternate spans; a bridge consisting of a series of separated bridges; and a
continuous bridge with extra cable connecting the pylon top with adjacent
pylons at deck level. A typical interior segment of the bridge with a
span of 350m is considered which is modelled as a plane system using beam
and truss elements. The linear earthquake analysis is carried out by the
response spectrum technique using SAP IV .
The responses due to the horizontal and vertical components of the
design basis and maximum credible earthquakes are investigated and the
sensitivity of the dynamic response with respect to damping is discussed.
The results s how that, for the design basis earthquake, and a damping
ratio of 2%, the bridge with hinges will experience its largest vertical
deflection, which is 0.50 m, at the hinge location. Considering the absolute maximum dynamic forces it can be seen that for the different systems analysed large differences occur mainly in the pylon area and at
alternate midspan where either hinge or supports are located. In addition, the extra cables connecting adjacent pylons have a very small effect on the stresses and deflections in the deck, however, the lowest
eigenfrequency of the bridge is increased by 33% and tip displacement of
tower is reduced by 50% as compared to the continuous bridge. |
| 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) | Pama, Ricardo P. ;Hasegawa Akio
|
| Scholarship Donor(s) | DAAD (German Academic Exchange Program) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |