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http://dx.doi.org/10.5762/KAIS.2016.17.12.301

Development of Impact Factor Response Spectrum based on Frequency Response of Both Ends-Fixed Beam for Application to Continuous Bridges  

Roh, Hwasung (Department of Civil Engineering, Chonbuk National University)
Lee, Huseok (Structural Eng. Research Division, Korea Institute of Civil Eng. and Building Tech.)
Park, Kyung-Hoon (Structural Eng. Research Division, Korea Institute of Civil Eng. and Building Tech.)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.12, 2016 , pp. 301-306 More about this Journal
Abstract
In bridge performance assessments, a new load carrying capacity evaluation model of simple bridges was proposed, which is based on the developed simple support impact factor spectrum. In this paper, a conservative assumption that the inner span with the both ends fixed boundary condition is ideal for applying the impact factor response spectrum for continuous bridges. The impact factor response spectrum has been proposed based on this assumption. The response spectrum by comparing the numerical analysis result and actual measurement data verified the applicability. The analysis was loading the moving load of DB-24 in a six-span continuous bridge, which was the same as the actual measurement data, the dynamic response was measured in the fourth span. The frequency of the bridge was obtained by FFT on the acceleration response and the span-frequency of sample bridge was calculated by the frequency. The impact factor of the sample bridge was determined by applying the span-frequency of the bridge to the proposed response spectrum; it was similar to the result of comparing the actual measured impact factor. Therefore, the method using the impact factor response spectrum based on the frequency response of both ends-fixed beam was found to be applicable to an actual continuous bridge.
Keywords
Impact Factor Response Spectrum; Both Ends-Fixed Beam; Load Carrying Capacity Evaluation; Continuous Bridge; Span-Frequency;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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