Dynamic analytical modeling of horizontal outline turn of T-girder simply supported bridge
Layout line of bridge structure is a direction line which is used to define the horizontal and vertical alignment of the bridge structure. The objective of this study is to evaluate and optimize the different designs of bridge horizontal outline turn and compare the results with horizontal layout...
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2021
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| Online Access: | http://journalarticle.ukm.my/17816/1/19.pdf http://journalarticle.ukm.my/17816/ https://www.ukm.my/jkukm/volume-332-2021/ |
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| Summary: | Layout line of bridge structure is a direction line which is used to define the horizontal and vertical alignment of the bridge
structure. The objective of this study is to evaluate and optimize the different designs of bridge horizontal outline turn and
compare the results with horizontal layout straight of bridge using dynamic analysis according to finite element analysis
method. Dynamic analysis results showed that most models have converging values of dynamic natural frequency except
Model No. F. and it explains that the higher rate of natural frequency is 5.10Hz within model No. F. The maximum value of
loaded frequency is equal to 6.35 Hz for model No. I (Straight - curve right - straight - curve left - straight). Model No. A
appears minimum value of loaded frequency which equal to 3.56Hz. The higher value of loaded frequency indicates that the
bridge model has high vibration state which effects on the stiffness and flexibility of bridge structure. Model No. I appears
higher value of downward acceleration which is 3.55m/s2. The maximum value of upward and downward deflection is
1.84mm and 4.07mm respectively in model No. G, indicating that this model will easy to deflect under traffic loads. It
can be concluded that The bridges models No. F, H, I have values of loaded frequency higher than the values of natural
frequency. Therefore, these models have lower stiffness and flexibility and bearing capacity than other. Therefore, this study
recommended that the optimum design which has high stiffness and more elasticity. |
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