Seismic performance of long cable-stayed bridge with various time history loading using finite element method

Recently, numerous natural disaster events have occurred in various parts of the world. Bridges are one of the most critical structures to be examined to check for defects resulting from disaster events like earthquakes. Therefore, the serviceability of the structure is important to maintain the saf...

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Bibliographic Details
Published inIOP conference series. Earth and environmental science Vol. 479; no. 1; pp. 12005 - 12014
Main Authors Aizon, Nabila Huda, Adnan, Azlan, Ramli, Mohd Zamri, Arjuna, Norazah, Alel, Asmawisham, Muhammad Yuzir, Muhamad Ali
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.06.2020
Subjects
Bridge decks
Bridge loads
Cable-stayed bridges
Cables
Damage assessment
Earthquake damage
Earthquake loads
Earthquakes
Finite element method
Free vibration
Integration
Mathematical models
Natural disasters
Piers
Pylons
Seismic activity
Seismic analysis
Seismic response
Three dimensional models
Vibration
Vibration analysis
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Summary:Recently, numerous natural disaster events have occurred in various parts of the world. Bridges are one of the most critical structures to be examined to check for defects resulting from disaster events like earthquakes. Therefore, the serviceability of the structure is important to maintain the safety of users. Thus, the main objective of this work is to study the seismic response of a cable-stayed bridge under earthquake time history loading. The cable-stayed bridge components (deck, piers, pylons, and cables) were modelled using finite element modelling in three dimensional (3D). Two types of seismic analysis was implemented in this study; Free Vibration Analysis (FVA) and Nonlinear Time History (NLTH) direct integration analysis to obtain the bridge seismic performance under the earthquake loading. A total of eight earthquake loads in scaled Peak Ground Acceleration (PGA) values of 0.75g, 1.0g, and 1.5g to represent low, moderate and strong earthquake loads, respectively, were used for the analysis. First, eight mode shapes with component directional and period are presented for free vibration analysis. Meanwhile, the NLTH direct integration analysis results reveal the time detection of seismic cable-stayed damage levels under certain peak ground accelerations (PGA). It can be concluded that the long cable-stayed bridge is not safe under several earthquake loads due to different earthquake load profiles. The results are also important to aid further damage assessment of the cable-stayed type of bridge.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/479/1/012005