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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.69 No.2
- 발행연도
- 2019.1
- 수록면
- 155 - 162 (8page)
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초록· 키워드
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It is very common to find an empirical formulation in an earthquake design code to calculate fundamental vibration period of a structural system. Fundamental vibration period or frequency is a key parameter to provide adequate information pertinent to dynamic characteristics and performance assessment of a structure. This parameter enables to assess seismic demand of a structure. It is possible to find an empirical formulation related to reinforced concrete structures, masonry towers and slender masonry structures. Calculated natural vibration frequencies suggested by empirical formulation in the literatures has not suits in a high accuracy to the case of rest of the historical masonry bridges due to different construction techniques and wide variety of material properties. For the listed reasons, estimation of fundamental frequency gets harder. This paper aims to present an empirical formulation through Mean Square Error study to find ambient vibration frequency of historical masonry bridges by using a non-linear regression model. For this purpose, a series of data collected from literature especially focused on the finite element models of historical masonry bridges modelled in a full scale to get first global natural frequency, unit weight and elasticity modulus of used dominant material based on homogenization approach, length, height and width of the masonry bridge and main span length were considered to predict natural vibration frequency. An empirical formulation is proposed with 81% accuracy. Also, this study draw attention that this accuracy decreases to 35%, if the modulus of elasticity and unit weight are ignored.
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참고문헌 (31)
참고문헌 신청
Ahmet C. Altunisik / 2015 / The effect of arch geometry on the structural behavior of masonry bridges / Smart Structures and Systems, An International Journal 16(6):1069~1089
Binda, L. / 1999 / Flat-jack test : A slightly destructive technique for the diagnosis of brick and stone masonry structures / Int. J. Restorat. Build. Monum 5(5):449~472
Costa, C. / 2015 / Updating numerical models of masonry arch bridges by operational modal analysis / Int. J. Architect. Herit 9(7):760~774
Diaferio, M. / 2018 / Prediction of the fundamental frequencies and modal shapes of historic masonry towers by empirical equations based on experimental data / Eng. Struct 156:433~442
Dogangun, A. / 2012 / Seismic vulnerability and preservation of historical masonry monumental structures / Earthq. Struct 3(1):83~95
Binda, L. / 1999 / Flat-jack test : A slightly destructive technique for the diagnosis of brick and stone masonry structures / Int. J. Restorat. Build. Monum 5(5):449~472
Costa, C. / 2015 / Updating numerical models of masonry arch bridges by operational modal analysis / Int. J. Architect. Herit 9(7):760~774
Diaferio, M. / 2018 / Prediction of the fundamental frequencies and modal shapes of historic masonry towers by empirical equations based on experimental data / Eng. Struct 156:433~442
Dogangun, A. / 2012 / Seismic vulnerability and preservation of historical masonry monumental structures / Earthq. Struct 3(1):83~95
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