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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.77 No.3
- 발행연도
- 2021.1
- 수록면
- 343 - 354 (12page)
이용수
초록· 키워드
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The frequencies formulas of the bridge are of great importance in the design process since these formulas provide insight dynamic characteristics of the structure, which guides the designers to parametric analyses and the layout of the bridge in conceptual or preliminary design. Continuous rigid frame bridge is popular in the mountainous area. Mostly, this type of bridge was simplified either as a girder or cantilever when calculating the frequency, however, studies showed that the different configuration of the bridge made the problem more complex, and there is no unified fundamental calculation pattern for this kind of bridge. In this study, an empirical frequency equation is proposed as a function of pier’s height, stiffness of pier and the weight of the structure. A unified fundamental frequency formula is presented based on the energy principle, then the typical continuous rigid frame bridge is investigated by finite element method (FEM) to study the dynamic characteristics of the structure, and then several key parameters are investigated on the effect of structural frequency. These parameters include the number, position and stiffness of the tie beam. Nonlinear regression analyses are conducted with a comprehensive statistical study from plenty of engineering structures. Finally, the proposed frequency equation is validated by field test results. The results show that the fundamental frequency of the continuous rigid frame bridge increases more than 15% when the tie beams are set, and it increases with the stiffness ratio of tie beam to pier. The results also show that the presented unified fundamental frequency has an error of 4.6% compared with the measured results. The investigation can predicate the approximate longitudinal fundamental frequency of continuous ridged frame bridge, which can provide reference for the seismic response and dynamic impact factor design of the pier.
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참고문헌 (28)
참고문헌 신청
Auciello, N. M. / 2001 / On the transverse vibrations of nonuniform beams with axial loads and elastically restrained ends / J. Mech. Sci 43(1):193~208
2012 / AASHTO LRFDUS-6, AASHTO LRFD Bridge Design Specifications / American Association of State Highway and Transportation Officials
Marco Bonopera / 2018 / Prestress force effect on fundamental frequency and deflection shape of PCI beams / Structural Engineering and Mechanics, An Int＇l Journal 67(3):255~265
Cantieni, R. / 1984 / Dynamic load testing of highway bridges / Transportation Res. Record 950:141~148
Deng, L. / 2015 / State-of-the-art review of dynamic impact factors of highway bridges / J. Bridge Eng 20(5):04014080
2012 / AASHTO LRFDUS-6, AASHTO LRFD Bridge Design Specifications / American Association of State Highway and Transportation Officials
Marco Bonopera / 2018 / Prestress force effect on fundamental frequency and deflection shape of PCI beams / Structural Engineering and Mechanics, An Int＇l Journal 67(3):255~265
Cantieni, R. / 1984 / Dynamic load testing of highway bridges / Transportation Res. Record 950:141~148
Deng, L. / 2015 / State-of-the-art review of dynamic impact factors of highway bridges / J. Bridge Eng 20(5):04014080
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