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Title |
Study on Application of Wave Travelling Effect and Local Site Effect to Design Standard for Analysing Seismic Behavior of Long-Span Cable-Stayed Bridge
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Authors |
박연수 ; 송영봉 ; 현기환 ; 이순남 ; 양원열 |
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Keywords |
사장교 ; 파동전달효과 ; 다지지점 가진 ; 균등가진 ; 지반특성 효과 ; 케이블 강교량 설계지침(안) ; Cable-stayed bridges ; Wave travelling effect ; Multiple-support excitation ; Uniform excitation ; Local site effect ; Cable steel bridge design handbook |
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Abstract |
Number of long-span bridge construction has been increased recently so that seismic consideration of design has become significant. To adapt such significance to design, seismic design in the newly revised 'Cable Steel Bridge Design Handbook' specifies some of wave travelling effect and local site effect. In this study, a cable-stayed bridge with main span of 500m is analysed having variables of uniform excitation, wave travelling effect, and wave travelling effect plus local site effect. Result shows that wave travelling effect in cable-stayed bridge affects considerably to its seismic response under weak soil condition even though the span length is relatively short. What's more, regardless of soil type, the seismic response has become higher for analysis with wave travelling effect and local site effect than with wave travelling effect only. Consequently, in seismic response analysis of long-span bridge, consideration should be given to application of wave travelling effect and local site effect.
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