A Study of Dynamic Behavior of Segmental U-shaped Prestressed Concrete Girder Applied with Integrated Tensioning Systems

doi:10.15683/kosdi.2024.6.30.369

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2024 Vol.20, Issue 2 Preview Page Next Page

Original Article

A Study of Dynamic Behavior of Segmental U-shaped Prestressed Concrete Girder Applied with Integrated Tensioning Systems 복합긴장방식이 적용된 세그멘탈 U형 거더 동적 거동 특성 연구: 장현옥¹ ㆍ장일영² *
Hyunock Jang¹ , Ilyoung Jang² *; ¹ CEO, J Engineering and Construction Co., Ltd., Suwon, Republic of Korea
² Professor, Department of Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea

30 June 2024. pp. 369-378

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Abstract

Purpose: This study aims to verify structural stability by manufacturing a 40m full-scale specimen composed of a segmental U-shaped PSC girder with integrated tensioning systems and a concrete slab, proceeding dynamic behavior tests, and compare the results of the tests with the results of numerical analysis. Method: Dynamic behavior tests were conducted on a full-scale, undamaged specimen using an impact hammer, and the natural frequency and damping ratio were measured and compared with numerical analysis techniques and the general damping ratio of the facilities. Result: The natural frequency of the numerical analysis model consisting of a girder and slab composite section was calculated to be 2.561Hz, the natural frequency of the full-scale specimen was measured to be 2.670Hz, and the damping ratio was calculated to be 0.42~0.68%. Conclusion: The natural frequency of the full-scale specimen was found to be 4.3% larger than that of the numerical analysis model. Since the masses of the full-scale specimen and the numerical analysis model are the same as 99.97%, it can be derived that the stiffness of the full-scale specimen has secured structural safety and stability. As a result, the dynamic behavior stability of the specimen was verified. The measured damping ratio of 0.42~0.68% was found to be a stable dynamic behavior compared to the PSC structures damping ratio of 0.5~1.0% in the elastic region.

Keywords

Integrated tensioning

Segmental U-shaped

Full-scale specimen

Natural frequency

Damping ratio

연구목적: 본 연구는 복합 긴장 방식이 적용된 세그멘탈 PSC U형 거더와 콘크리트 바닥판 슬래브가 합성된 40m 실대형 실험체를 제작하여 동적 거동 실험을 실시하고 수치해석적기법 결과와 비교 검토함으로써 구조적 안정성을 검증하고자 한다. 연구방법: 손상이 없는 실대형 실험체에 impact hammer 타격으로 동적 거동 실험을 실시하여 고유진동수와 감쇠비를 측정하고 수치해석적기법 및 구조물의 일반적인 감쇠비와 상호 비교 검토하였다. 연구결과: 거더와 슬래브 합성단면으로 구성된 수치해석 모델의 고유진동수는 2.561Hz로 계산되었고 실대형 실험체의 고유진동수는 2.670Hz로 계측되었으며 감쇠비는 0.42~0.68%로 산정되었다. 결론: 실대형 실험체 고유진동수는 수치해석 모델의 고유진동수 대비 약 4.3% 증가된 값으로써 실대형 실험체와 수치해석 모델의 질량이 동일하므로(99.97%) 실대형 실험체 강성은 구조적 안전성을 확보하였음을 도출할 수 있으며 결과적으로 실험체의 동적 거동 안정성을 검증하였다. 계측된 감쇠비 0.42~0.68%는 탄성영역의 PSC구조물 감쇠비 0.5~1.0%와 비교하여 볼 때, 안정적 동적 거동임을 확인하였다.

키워드

PSC U형거더

복합 긴장 방식

세그멘탈

실대형 실험체

고유진동수

감쇠비

References

Brockenbrough, R.L., Merritt, F.S. (2011). Structural Steel Designer's Handbook. 5th Ed., ASCE Press, McGraw-Hill, US.
Cho, S.K., Youn, S.G., Park, Y.H. (2004). "Optimization of prestressed concrete girders for standard sectios." Journal of the Korean Society of Civil Engineers, Vol. 24, No. 4A, pp. 853-859.
Choi, S.H. (2011). "Dynamic performance evaluation of new type PSC Railroad Bridges." Journal of the Society of Disaster Information, Vol. 7, No. 4, pp. 259-265.
Eby, C.C., Kulicki, J.M., Kostem, C.N., Zellin, M.A. (1973). The Evaluation of St. Venant Torsional Constants for Prestressed Concrete I Beams. Fritz Laboratory Report No.400.12, Lehigh University, Bethlehem, PA.
Han, M.Y., Kim, B.Y. (2001). "Dynamic performance evaluation of new type PSC railroad bridge." Journal of the Korean Society of Civil Engineers, Vol. 21, No. 4A, pp. 535-546.
Hindi, A., Macgregor, R., Kreger, M.E., Breen, J.E., (1995). "Enhancing strength and ductility of post-tensioned segmental box girder bridges." ACI Structural Journal, Vol.92, No.1, pp. 33-44.
Karl, R., Melvin, R. (1973). Bridge Strudl Manual. Bridge Engineering, University of California Davis, CA. US.
KIBSE (2015). Commentary of Bridge Design Standard (Limit State Design), Seoul, pp. 4-29-4-35.
Kim, D.G. (2009). Dynamics of structures. GoomiBook, Seoul.
Kim, H.K., Jang, I.Y. (2018). "The study of a practical modeling method for the analysis of dynamic behavior by the mockup test of prestressed concrete girder." Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 22, No. 6, pp. 148-156.
Kim, W.H., Lee, J.W., Lee, S.M. (2020). "Evaluation for ultimate flexural strength of steel composite girder with high strength concrete." Journal of the Society of Disaster Information, Vol. 16, No. 4, pp. 796-805.
Kiyota, S., Takasu, H. (2006). Shin Kenchiku Doboku Kouzo Manual. Rikogakusha Publishing Co., Ltd., Tokyo, Japan.
Korea Expressway Coperation (2007). Construction Magazine of the Gochang-Damyang Expressway on National Highway No. 14. Korea Expressway Coperation, Gyeonggi-do.
Ministry of Land, Infrastructure and Transport (2023). 2023 Road Bridge and Tunnel Status Report. Ministry of Land, Gyeonggi-do.
Newmark, N.M., Hall, W.J. (1982). Earthquake Spectra And Design. Earthquake Engineering Research Institute, California, USA.
Park, J.G. (2015). Efficiency on PSC I Girder by Extending the Upper Flange Width. Ph.D. Kumoh National Institute of Technology.

Information

Publisher :The Korean Society of Disaster Information
Publisher(Ko) :한국재난정보학회
Journal Title :Journal of the Society of Disaster Information
Journal Title(Ko) :한국재난정보학회논문집
Volume : 20
No :2
Pages :369-378
DOI :https://doi.org/10.15683/kosdi.2024.6.30.369

[1] Brockenbrough, R.L., Merritt, F.S. (2011). Structural Steel Designer's Handbook. 5th Ed., ASCE Press, McGraw-Hill, US.

[2] Cho, S.K., Youn, S.G., Park, Y.H. (2004). "Optimization of prestressed concrete girders for standard sectios." Journal of the Korean Society of Civil Engineers, Vol. 24, No. 4A, pp. 853-859.

[3] Choi, S.H. (2011). "Dynamic performance evaluation of new type PSC Railroad Bridges." Journal of the Society of Disaster Information, Vol. 7, No. 4, pp. 259-265.

[4] Eby, C.C., Kulicki, J.M., Kostem, C.N., Zellin, M.A. (1973). The Evaluation of St. Venant Torsional Constants for Prestressed Concrete I Beams. Fritz Laboratory Report No.400.12, Lehigh University, Bethlehem, PA.

[5] Han, M.Y., Kim, B.Y. (2001). "Dynamic performance evaluation of new type PSC railroad bridge." Journal of the Korean Society of Civil Engineers, Vol. 21, No. 4A, pp. 535-546.

[6] Hindi, A., Macgregor, R., Kreger, M.E., Breen, J.E., (1995). "Enhancing strength and ductility of post-tensioned segmental box girder bridges." ACI Structural Journal, Vol.92, No.1, pp. 33-44.

[7] Karl, R., Melvin, R. (1973). Bridge Strudl Manual. Bridge Engineering, University of California Davis, CA. US.

[8] KIBSE (2015). Commentary of Bridge Design Standard (Limit State Design), Seoul, pp. 4-29-4-35.

[9] Kim, D.G. (2009). Dynamics of structures. GoomiBook, Seoul.

[10] Kim, H.K., Jang, I.Y. (2018). "The study of a practical modeling method for the analysis of dynamic behavior by the mockup test of prestressed concrete girder." Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 22, No. 6, pp. 148-156.

[11] Kim, W.H., Lee, J.W., Lee, S.M. (2020). "Evaluation for ultimate flexural strength of steel composite girder with high strength concrete." Journal of the Society of Disaster Information, Vol. 16, No. 4, pp. 796-805.

[12] Kiyota, S., Takasu, H. (2006). Shin Kenchiku Doboku Kouzo Manual. Rikogakusha Publishing Co., Ltd., Tokyo, Japan.

[13] Korea Expressway Coperation (2007). Construction Magazine of the Gochang-Damyang Expressway on National Highway No. 14. Korea Expressway Coperation, Gyeonggi-do.

[14] Ministry of Land, Infrastructure and Transport (2023). 2023 Road Bridge and Tunnel Status Report. Ministry of Land, Gyeonggi-do.

[15] Newmark, N.M., Hall, W.J. (1982). Earthquake Spectra And Design. Earthquake Engineering Research Institute, California, USA.

[16] Park, J.G. (2015). Efficiency on PSC I Girder by Extending the Upper Flange Width. Ph.D. Kumoh National Institute of Technology.

Journal of the Society of Disaster Information ISSN:1976-2208(Print) 2671-5287(Online) 한국재난정보학회논문집

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