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International Journal of Steel Structures

, Volume 19, Issue 2, pp 504–516 | Cite as

Seismic Fragility Analysis of Steel Frame Structures Containing Initial Flaws in Beam-Column Connections

  • Yuan ZuoEmail author
  • Weibin Li
  • Menglu Li
Article
  • 44 Downloads

Abstract

The objective of this paper was to evaluate the influence of initial flaws in the beam-column connections on the seismic performance of steel frame structures. The finite element models were constructed with different initial flaw lengths by ABAQUS. The initial flaw length was 0, 8, and 16 mm, respectively. The dynamic elastic-plastic time history analysis and the pushover analysis were conducted to obtain the probabilistic characteristics of seismic demand and seismic capacity. Seismic demands are quantified in terms of the maximum drift angle (RDA) and the displacement ductility ratio \( \left( {\mu_{d} } \right) \). Moreover, the peak ground acceleration (PGA) was used for the pushover analysis. Formulas considering the influence of initial flaws on failure probability of a structure were derived for each length using different design basic acceleration of ground motion. The fragility curves were further constructed based on the data of seismic demand and capacity. The results show that the fragility of steel frame structures is similar across different seismic demand parameters. In addition, the analyses of fragility curves obviously indicate that the seismic fragility of steel frame structures increases as flaw length increases. Finally, the fragility of steel frame structures with initial flaws is consistent using different design basic acceleration of ground motion.

Keywords

Initial flaws Steel frame structures Seismic demand Seismic capacity Fragility curve 

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51778143), the Priority Academic Program Development of Jiangsu Higher Education Institutions (No. CE02-1-51), and the Research & Innovation Project for College Graduates of Jiangsu Province of China (No. KYLX15_0211).

References

  1. AISC. (1994). In Proceedings of the AISC special task committee on the Northridge earthquake. American Institute of Steel Construction, Chicago.Google Scholar
  2. ATC. (1991). Seismic vulnerability and impact of disruptions of lifelines in the conterminous United States. ATC Report No. ATC-25, Redwood City, California.Google Scholar
  3. ATC. (1996). Seismic evaluation and retrofit of concrete buildings. ATC Report No. ATC-40, California.Google Scholar
  4. Chen, Z. H. (2014). Seismic performance evaluation of existing RC frame structure. Ph.D. Dissertation, Qingdao University of Technology.Google Scholar
  5. Chi, W. M., Deierlein, G. G., & Ingraffea, A. (2000). Fracture toughness demands in welded beam-column moment connections. Journal of Structural Engineering, 126(1), 88–97.CrossRefGoogle Scholar
  6. EN 1998-3-2005. (2005). Eurocode 8: design of structures for earthquake resistance. Part 3: Assessment and retrofitting of buildings. Brussels: European Committee for Standardization.Google Scholar
  7. FEMA. (1997). NEHRP guidelines for the seismic rehabilitation of buildings. FAME Publication 273, Washington D.C.Google Scholar
  8. FEMA. (1999). HAZUS99 User’s Manual. Washington D.C.Google Scholar
  9. GB, T 50011–2010. (2010). Code for seismic design of buildings. Beijing: China Architecture & Building Press.Google Scholar
  10. Hu, F. X., Shi, G., & Shi, Y. J. (2017). Experimental study on seismic behavior of high strength steel frames: Global response. Engineering Structures, 131, 163–179.CrossRefGoogle Scholar
  11. Hwang, H., Liu, J. B., & Chiu, Y. H. (2001). Seismic fragility analysis of highway bridges. Memphis: Center for Earthquake Research and Information, University of Memphis.Google Scholar
  12. Joh, C., & Chen, W. F. (1999). Fracture strength of welded flange-bolted web connections. Journal of Structural Engineering, 125(5), 565–571.CrossRefGoogle Scholar
  13. Kauffmann, E. J. and Fisher, J. (1996). Fracture analysis of failed moment frame weld joints produced in full-scale laboratory tests and buildings damaged in the Northridge earthquake. Technical report SAC-95-08, (pp. 1–21).Google Scholar
  14. Mackie, K. R. (2005). Fragility basis for California highway overpass bridge seismic decision making. Ph.D. Dissertation, University of California Berkeley.Google Scholar
  15. Noroozinejad, F. E., Hashemi, R. F., Talebi, M., et al. (2014). Seismic risk analysis of steel-MRFs by means of fragility curves in high seismic zones. Advances in Structural Engineering, 17(9), 1227–1240.CrossRefGoogle Scholar
  16. Orsini, G. (1999). A model for buildings’ vulnerability assessment using the parameter less scale of seismic intensity (PSI). Earthquake Spectra, 15(3), 463–483.CrossRefGoogle Scholar
  17. Park, J., & Kim, J. (2010). Fragility analysis of steel moment frames with various seismic connections subjected to sudden loss of a column. Engineering Structures, 32(6), 1547–1555.CrossRefGoogle Scholar
  18. Rossetto, T., & Elnashai, A. S. (2003). Derivation of vulnerability functions for European-type RC structures based on observational data. Engineering Structures, 25(10), 1241–1263.CrossRefGoogle Scholar
  19. Rota, M., Penna, A., & Magenes, G. (2010). A methodology for deriving analytical fragility curves for masonry buildings based on stochastic nonlinear analyses. Engineering Structures, 32(5), 1312–1323.CrossRefGoogle Scholar
  20. SAC. (1995). Interim guidelines: evaluation, repair, modification and design of welded steel moment frame structures. Report FEMA No. 267/SAC-95-02, SAC Joint Venture, Sacramento, California.Google Scholar
  21. Shinozuka, M., Feng, M. Q., Lee, J., & Naganuma, T. (2000). Statistical analysis of fragility curves. Journal of Mechanical Engineering, 126(12), 1224–1231.CrossRefGoogle Scholar
  22. Singhal, A., & Kiremidjian, A. S. (1998). Bayesian updating of fragilities with application to RC Frames. Journal of Structural Engineering, 124(8), 922–929.CrossRefGoogle Scholar
  23. Tenchini, A., Aniello, M. D., Rebelo, C. R., et al. (2014). Seismic performance of dual-steel moment resisting frames. Journal of Constructional Steel Research, 101, 437–454.CrossRefGoogle Scholar
  24. Villani, A., Castro, J. M., & Elghazouli, A. Y. (2009). Improved seismic design procedure for steel moment frames. STESSA 2009: Behaviour of Steel Structures in Seismic Areas, Philadelphia.Google Scholar
  25. Wang, D. (2006). Seismic fragility analysis and probabilistic risk analysis of steel frame structures. Ph.D. Dissertation, Harbin Institute of Technology.Google Scholar
  26. Wang, Y. B., Li, G. Q., Cui, W., et al. (2014). Seismic behavior of high strength steel welded beam-column members. Journal of Constructional Steel Research, 102, 245–255.CrossRefGoogle Scholar
  27. Xu, G. Q., & Ellingwood, B. (2011). Probabilistic robustness assessment of Pre-Northridge steel moment resisting frames. Journal of Structural Engineering, 137(9), 925–934.CrossRefGoogle Scholar
  28. Yu, X..H. (2012). Probabilistic seismic fragility and risk analysis of reinforced concrete frame structures. Ph.D. Dissertation, Harbin Institute of Technology.Google Scholar

Copyright information

© Korean Society of Steel Construction 2018

Authors and Affiliations

  1. 1.School of Civil EngineeringSoutheast UniversityNanjingChina
  2. 2.Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of EducationSoutheast UniversityNanjingChina

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