Dynamic response of a multi-span suspension bridge subjected to highway vehicle loading

Aswal, Surbhi; Nallasivam, K.

doi:10.1007/s42107-023-00655-9

Cited by 2 publications

(1 citation statement)

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“…They observed a higher response for the middle pylon, and the most vulnerable location was identified near the composite beam segment for the considered bridge. Aswal and Nallasivam (2023) studied the response of MSB consisting 2 main spans of 168 meters and side spans of 80 meters under highway vehicular load. They came to the conclusion that the speed of the vehicle significantly affects the bridge's dynamic response.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response of Multi-span Suspension Bridge under Multi-Support Excitation

Chauhan,

Chandrasekaran,

Datta

et al. 2024

Preprint

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The multi-span suspension bridge, a novel bridge system, has emerged as an economically viable alternative for sea-crossing bridges with extensive spans. However, as bridge length increases, the complex correlation between support excitation becomes apparent due to the coherency effect in the underlying soil and the seismic wave-passage effect, termed Multi-Support Excitation (MSE). This study focuses on the seismic responses of Multi-span Suspension Bridge (MSB) under MSE, taking into account incoherence and wave-passage effects. The study conducts a time history analysis of “Cheon-Sa Bridge” to investigate the responses of girder and pylons under three different types of homogenous soil conditions: soft, medium, and firm, with three different apparent wave velocities of 600 m/s, 900 m/s, and 1200 m/s. The responses obtained for different MSE cases are compared with a uniform seismic excitation of recorded earthquake ground motion of El-Centro 1940, Imperial Valley: 180 deg. Results show that MSE significantly affects the longitudinal and vertical responses of MSB. The girder exhibits 3.3 times higher deflections under soft and medium soil MSE cases. The MSE cases significantly increase the girder axial force by about 6 times that of the uniform excitation case. The side pylons exhibit a 30% – 38% increase in transverse responses and approximately 10–12 times higher longitudinal responses. It is concluded that the local site conditions and corresponding acceleration spectral density of bedrock motion significantly influence the response of MSB. Merely considering the wave-passage effect may underestimate the actual response.

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Section: Introductionmentioning

confidence: 99%

Seismic Response of Multi-span Suspension Bridge under Multi-Support Excitation

Chauhan,

Chandrasekaran,

Datta

et al. 2024

Preprint

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Reasponse-spectra method for assessing seismic resistance of structures possibilities and prospects of usage

Benin,

Zhemchugov-Gitman,

Kurbanov

et al. 2023

E3S Web Conf.

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The issues of using the response-spectra method for calculating the seismic resistance of structures are considered. The physical meaning of the coefficients included in the normative calculation formulas of the response-spectra technique is analyzed, ways of refining these coefficients are indicated. In particular, the dependence of the peak ground acceleration on the design accelerogram period is noted. The issue of obtaining the displacement spectra on the base of the normative spectral curve is considered. It is noted that with the correct setting of the normative coefficients, calculation by the response-spectra method gives more reliable values of the calculated factors. Dynamic calculating of structures over time are only needed for substantially non-linear systems and, possibly, heavily damped systems with non-uniform damping. Single calculation of the structure according to an accelerogram only disorientate the designer. The refined version of the linear spectral technique presented in the paper should be considered as the main method for assessing the seismic resistance of buildings and structures.

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Dynamic response of a multi-span suspension bridge subjected to highway vehicle loading

Cited by 2 publications

References 11 publications

Seismic Response of Multi-span Suspension Bridge under Multi-Support Excitation

Seismic Response of Multi-span Suspension Bridge under Multi-Support Excitation

Reasponse-spectra method for assessing seismic resistance of structures possibilities and prospects of usage

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