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논문 기본 정보

자료유형
학술저널
저자정보
Piotr Górski (Opole University of Technology) Beata Stankiewicz (Opole University of Technology) Marcin Tatara (Opole University of Technology)
저널정보
국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.29 No.4
발행연도
2018.1
수록면
527 - 544 (18page)

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초록· 키워드

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The paper presents the study on a change in modal parameters and structural stiffness of cable-stayed Fiberline Bridge made entirely of Glass Fiber Reinforced Polymer (GFRP) composite used for 20 years in the fjord area of Kolding, Denmark. Due to this specific location the bridge structure was subjected to natural aging in harsh environmental conditions. The flexural properties of the pultruded GFRP profiles acquired from the analyzed footbridge in 1997 and 2012 were determined through three-point bending tests. It was found that the Young's modulus increased by approximately 9%. Moreover, the influence of the temperature on the storage and loss modulus of GFRP material acquired from the Fiberline Bridge was studied by the dynamic mechanical analysis. The good thermal stability in potential real temperatures was found. The natural vibration frequencies and mode shapes of the bridge for its original state were evaluated through the application of the Finite Element (FE) method. The initial FE model was created using the real geometrical and material data obtained from both the design data and flexural test results performed in 1997 for the intact composite GFRP material. Full scale experimental investigations of the free-decay response under human jumping for the experimental state were carried out applying accelerometers. Seven natural frequencies, corresponding mode shapes and damping ratios were identified. The numerical and experimental results were compared. Based on the difference in the fundamental natural frequency it was again confirmed that the structural stiffness of the bridge increased by about 9% after 20 years of service life. Data collected from this study were used to validate the assumed FE model. It can be concluded that the updated FE model accurately reproduces the dynamic behavior of the bridge and can be used as a proper baseline model for the long-term monitoring to evaluate the overall structural response under service loads. The obtained results provided a relevant data for the structural health monitoring of all-GFRP bridge.

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참고문헌 (11)

참고문헌 신청
Apicella, A. / 1982 / Water sorption and mechanical properties of a glass-reinforced polyester resin / Compos 13(4):406~410 google schola Bai, Y. / 2008 / Modal parameter identification for a GFRP pedestrian bridge / Compos. Struct 82(1):90~100 google schola El-Salakawy, E. / 2004 / Serviceability of concrete bridge deck slabs reinforced with fiber-reinforced polymer composite bars / Struct. J 101(5):727~736 google schola Gentile, C. / 2008 / Output-only modal identification of a reinforced concrete bridge from radar-based measurements / NDT&E Int 41(7):544~553 google schola Hassiotis, S. / 1995 / Identification of stiffness reduction using natural frequencies / J. Eng., Mech. ASCE 121(10):1106~1113 google schola

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