Influence of SSI and frequency content of non-uniform ground motions on bridge girder poundings

N. Chouw, Hong Hao

    Research output: Contribution to journalArticle

    Abstract

    The study addresses the effect of the characteristics of Japanese design spectra on the pounding potential of two bridge girders. The spatially varying ground motions for soft medium and hard soil condition are simulated stochastically. The effect of non-uniform ground displacements and accelerations, as well as soil-structurien teraction is studied. The common design criterion for pounding mitigationi sevaluated. The study reveals that a consideration of uniform ground excitation can strongly underestimatte he pounding potential, especially whenth egroun dmotions have low dominant frequencies, and the soil is soft. The closer are the vibration frequencies of the adjacent girders, the more prominent is the non-uniform ground motion effect The design recommendation for adjusting the structural frequencies should not be applied, if the ground is soft and a uniform ground excitation cannot be ensured
    Original languageEnglish
    Pages (from-to)841-851
    JournalJournal of Applied Mechanics
    Volume7
    Issue numberAugust
    Publication statusPublished - 2004

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