Analysis of damper effect on cable-stayed bridge using finite element simulation
Cable-stayed bridges generally having common defects such as excessive vibration due to wind action, corrosion and fatigue occurred at the cables supporting member. This study presents two different approaches for the demonstration of the damping effect due to wind action on cable-stayed bridge. T...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Fakulti Kejuruteraan ,UKM,Bangi.
2015
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| Online Access: | http://journalarticle.ukm.my/9505/1/5.pdf http://journalarticle.ukm.my/9505/ http://www.ukm.my/jkukm/?page_id=557 |
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| Summary: | Cable-stayed bridges generally having common defects such as excessive vibration due to wind action, corrosion and
fatigue occurred at the cables supporting member. This study presents two different approaches for the demonstration
of the damping effect due to wind action on cable-stayed bridge. The fi rst approach uses a simplifi ed analysis method to
study the reaction force at the cable end. A beam element was adopted for modelling the cables and a plate element for
modelling the bridge’s deck. The second approach is based on the selected damper system applied at the cable end to
determine the reaction response at the bridge models. Two methods are presented in this report with the consideration of
bridge geometric effect. The effect of pretension of the cable and the exact treatment of cable sag with the cable weight
is ignored. A numerical calculation has been carried out in determining the nominal transverse wind load, the nominal
longitudinal wind load on deck and the nominal longitudinal wind load on cables in accordance to the current code of
practice. The results generated from MIDAS Civil software have been used for comparing the analysis results. The stiffness
coeffi cient for the selected rubber damper type was being modelled at the cable end to examine the effect of nominal and
combined wind action at critical locations. The effectiveness of using the rubber damper to suppress the effects of wind
was investigated through superposition of these rubber dampers at the maximum reactions at the cable end. It was found
that the damper system adapted on the cable-stays has signifi cant infl uence on suppressing the action due to wind. |
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