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Title |
The study of a practical modeling method for the analysis of dynamic behavior by the mockup test of prestressed concrete girder
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Authors |
김형규(Hyung-Kyu Kim) ; 장일영(Il-Young Jang) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.6.148 |
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Keywords |
고유진동수 ; 실용적인 모델링 기법 ; 실물 모형체 실험 ; 긴장재 축방향 강성 ; 콘크리트 탄성계수 Natural frequency ; Practical modeling method ; Mockup test ; Axial stiffness of strands ; Modulus of elasticity |
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Abstract |
The integrity assessment of the bridge behavior is generalized by field data of a static load-deformation curve and dynamic properties such as impact factors and natural frequencies. Evaluating it with numerical analysis is a reasonable method. The results of the mockup test and the numerical analysis are corresponded with each other since the behavior of service load proceeds in elastic region. In case of the dynamic behavior of structure, especially for the analysis of vibration, the result of the mockup test differs from the result of numerical analysis a little due to the geometric shape and non-homogeneous materials. In order to converge on these tolerances, this study suggested several numerical models, analyzed the sensitivity and finally offered a practical modeling method for the estimation of bridge on the basis of the result of mockup test. Based on the model substituted concrete section for strands section, the natural frequency of the model composed with axial stiffness of strands or the model applied the modified modulus of elasticity was closest with the result of the mockup test.
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