Structural Engineering and Mechanics

  • 제61권3호
  • /
  • Pages.419-426
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  • 2017
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Dynamic performance of girder bridges with explosion-proof and aseismic system

  • Wang, Jingyu (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Yuan, Wancheng (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Wu, Xun (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Wei, Kai (University of Massachusetts)
  • 투고 : 2015.07.08
  • 심사 : 2016.12.21
  • 발행 : 2017.02.10
⟨ 이전 논문 다음 논문 ⟩

초록

Recently, the transportation of dangerous explosive goods is increasing, which makes vehicle blasting accidents a potential threat for the safety of bridge structures. In addition, blasting accidents happen more easily when earthquake occurs. Excessive dynamic response of bridges under extreme loads may cause local member damage, serviceability issues, or even failure of the whole structure. In this paper, a new explosion-proof and aseismic system is proposed including cable support damping bearing and steel-fiber reinforced concrete based on the existing researches. Then, considering one 40m-span simply supported concrete T-bridge as the prototype, through scale model test and numerical simulation, the dynamic response of the bridge under three conditions including only earthquake, only blast load and the combination of the two extreme loads is obtained and the applicability of this explosion-proof and aseismic system is explored. Results of the study show that this explosion-proof and aseismic system has good adaptability to seism and blast load at different level. The reducing vibration isolation efficiency of cable support damping bearing is pretty high. Increasing cables does not affect the good shock-absorption performance of the original bearing. The new system is good at shock absorption and displacement limitation. It works well in reducing the vertical dynamic response of beam body, and could limit the relative displacement between main girder and capping beam in different orientation so as to solve the problem of beam falling. The study also shows that the enhancement of steel fibers in concrete could significantly improve the blast resistance of main beam. Results of this paper can be used in the process of antiknock design, and provide strong theoretical basis for comprehensive protection and support of girder bridges.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Science and Technology of China, National Natural Science Foundation of China

참고문헌

  1. Burrell, R.P., Aoude, H. and Saatcioglu, M. (2015), "Response of SFRC columns under blast loads", J. Struct. Eng., 141(9), 04014209. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001186
  2. Fang, Q. and Wu, P. (2003), "The analysis of the main factors which affect the failure pattern of the RC beams subjected to blast loads", J. Comput. Mech., 20(1), 39-48.
  3. Foglar, M. and Kovar, M. (2013), "Conclusions from experimental testing of blast resistance of FRC and RC bridge decks", Int. J. Impact Eng., 59, 18-28. https://doi.org/10.1016/j.ijimpeng.2013.03.008
  4. Haciefendioglu, K., Banerjee, S., Soyluk, K. and Koksal, O. (2015), "Multi-point response spectrum analysis of a historical bridge to blast ground motion", Struct. Eng. Mech., 53(5), 897-919. https://doi.org/10.12989/sem.2015.53.5.897
  5. Hao, H. and Tang, E.K.C. (2010), "Numerical simulation of a cable-stayed bridge response to blast loads, Part II:Damage prediction and FRP strengthening", Eng. Struct., 32(10), 3193-3205. https://doi.org/10.1016/j.engstruct.2010.06.006
  6. Schenker, A., Anteby, I., Gal, E., Kivity, Y., Nizri, E., Sadot, O. and et al. (2008), "Full-scale field tests of concrete slabs subjected to blast loads", Int. J. Impact Eng., 35(3), 184-198. https://doi.org/10.1016/j.ijimpeng.2006.12.008
  7. Son, J. and Astaneh-Asl, A. (2011), "Blast resistance of steel orthotropic bridge decks", J. Bridge Eng., 17(4), 589-598. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000283
  8. Yang, X. (2010), The Numerical Simulation of Explosive Shock Phenomenon, Press of University of Science and Technology, He Fei, China.
  9. Yi, Z., Agrawal, A.K., Ettouney, M. and Alampalli, S. (2014), "Blast load effects on highway bridges. II: Failure modes and multihazard correlations", J. Bridge Eng., 19(4), 04013024. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000548
  10. Yi, Z., Agrawal, A.K., Ettouney, M. and Alampalli, S. (2014), "Blast load effects on highway bridges. I: Modeling and blast load effects", J. Bridge Eng., 19(4), 04013023. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000547
  11. Yuan, W., Wei, Z., Cao, X. and et al. (2011), "Cable damping bearing and the research on the application of seimic design of bridges", Eng.Mech., 28(S2), 204-209.
  12. Zhang, F. (2013), The World's First Explosion-proof Special Truck for the Transportation Safety of Fireworks, Hunan Safety and Disaster Prevention.
  13. Zhang, Y., Li, G., Chen, K. and et al. (2016), "Research advances of safety assessment of bridges under blast load", Explos. Shock Wav., 36(1), 135-144.
  14. Zhou, X. Q., Kuznetsov, V. A., Hao, H. and Waschl, J. (2008), "Numerical prediction of concrete slab response to blast loads", Int. J. Impact Eng., 35(10), 1186-1200. https://doi.org/10.1016/j.ijimpeng.2008.01.004
  15. Zhou, Y. and Chen, S. (2015), "Dynamic simulation of a longspan bridge-traffic system subjected to combined service and extreme loads", J. Struct. Eng., 141(9), 04014215. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001188

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