Title: Non-stationary Random Seismic Response Analysis of Long-span Suspension Bridges under Multi-support and Multi-dimensional Seismic Excitations
Abstract:Take a long-span suspension bridge across Sidu river as an engineering background,a precise finite element model of suspension bridges was established.The seismic response of the suspension bridge sub...Take a long-span suspension bridge across Sidu river as an engineering background,a precise finite element model of suspension bridges was established.The seismic response of the suspension bridge subject to the uniform excitation,traveling-wave effect,partial coherence effect,combination effect of traveling waves and partial coherence effects and multi-support excitations under one-dimensional and three-dimensional non-stationary random seismic ground motions were numerically simulated by a method for seismic analysis of the multi-support excitations under the three-dimensional non-stationary random seismic ground motions.The effect of apparent wave velocities and seismic non-stationarity on random seismic responses of structures is analyzed under multi-support and multi-dimensional seismic excitations.The results show that the spatial variation of seismic motions has a great influence on the structure seismic response.The influence of traveling wave effects is much larger than that of partial coherence effect on the structure seismic response.The structure seismic response under three-dimensional seismic excitations is greater than that under one-dimensional excitations.The effect of traveling waves on structure seismic response becomes weak with the apparent wave velocity increasing.The random seismic response analysis is secure when the stationarity of seismic ground motion is considered.Read More
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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