Abstract
This paper describes the behaviour of the longitudinal and cross girder of cable-stayed bridge due to multi-support excitation. Cablestayed bridges should be analysed by different support accelerations since generally they have long spans. In this research, an 800 m long cablestayed bridge was assessed by giving different support accelerations. The method used is by arranging simulation using structural analysis software. The displacement time histories are obtained by converting the response spectra using MathCAD. The structural responses were then compared to the application of single support excitation. Results show that there is a significant discrepancy between the two analyses. Single support excitation causes lower responses if the ground motion magnitudes are similar to the small magnitude of the multi-support excitation, and it yields to a higher responses if the magnitudes are similar to the greater value of the multi-support excitation.
Highlights
The development of bridges construction technology has been very fast and fascinating
Since the trend of cable supported bridge structures is for long-span bridges, the effect of dynamic loadings should be the main consideration, since the longer the span, the more dangerous the structure due to dynamic loadings
Rajasekaran [7] states that vibration can occur in a structure by imposing initial conditions, which generally manifest themselves as the energy input
Summary
The development of bridges construction technology has been very fast and fascinating This is because of the vast increase in computer technology, science, material, and other structural analysis and design methods. Many types of bridges have been built around the world by variation in length, spans, construction methodology and height. The longest span bridge built to date is Danyang-Kunshan Grand Bridge, China, with a length of about 185 km. This bridge has been included in the longest bridges in the world and holds the Guinness World Record. The type of this bridge is a suspension bridge, which uses cable as the main part of its structure.
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