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On the assessment of modal nonlinear pushover analysis for steel frames with semi-rigid connections

  • Zarfam, Panam (Department of Civil Engineering, Sharif University of Technology) ;
  • Mofid, Massood (Department of Civil Engineering, Sharif University of Technology)
  • 투고 : 2008.09.02
  • 심사 : 2009.04.22
  • 발행 : 2009.06.20

초록

Applying nonlinear statistical analysis methods in estimating the performance of structures in earthquakes is strongly considered these days. This is due to the methods' simplicity, timely lower cost and reliable estimation in seismic responses in comparison with time-history nonlinear dynamic analysis. Among nonlinear methods, simplified to be incorporated in the future guidelines, Modal Pushover Analysis, known by the abbreviated name of MPA, simply models nonlinear behavior of structures; and presents a very proper estimation of nonlinear dynamic analysis using lateral load pattern appropriate to the mass. Mostly, two kinds of connecting joints, 'hinge' and 'rigid', are carried out in different type of steel structures. However, it should be highly considered that nominal hinge joints usually experience some percentages of fixity and nominal rigid connections do not employ totally rigid. Therefore, concerning the importance of these structures and the significant flexibility effect of connections on force distribution and elements deformation, these connections can be considered as semi-rigid with various percentages of fixity. Since it seems, the application and implementation of MPA method has not been studied on moment-resistant steel frames with semi rigid connections, this research focuses on this topic and issue. In this regard several rigid and semi-rigid steel bending frames with different percentages of fixity are selected. The structural design is performed based on weak beam and strong column. Followed by that, the MPA method is used as an approximated method and Nonlinear Response History Analysis (NL-RHA) as the exact one. Studying the performance of semi-rigid frames in height shows that MPA technique offers reasonably reliable results in these frames. The methods accuracy seems to decrease, when the number of stories increases and does decrease in correlation with the semi-rigidity percentages. This generally implies that the method can be used as a proper device in seismic estimation of different types of low and mid-rise buildings with semi-rigid connections.

키워드

참고문헌

  1. AISC (1994), Load and Resistance Factor Design Specification for Structural Steel Buildings, American Institute of Steel Construction, Chicago
  2. AISC (2006), Seismic Provisions for Structural Steel Buildings, American Institute of Steel Construction
  3. Allahabadi, R. and Powell, G.H. (1988), DRAIN-2DX User Guide, Report No. UCB/EERC88/06, Earthquake Engineering Research Center, University of California, Berkeley, California
  4. American Society of Civil Engineers (2000), Prestandardand Commentary for the Seismic Rehabilitation of Buildings, FEMA-356, Federal Emergency Management Agency, Washington, D.C
  5. Applied Technology Council (1996), Seismic Evaluation and Retrofit of Concrete Buildings, Report No. ATC-40, Redwood City, California
  6. Building Seismic Safety Council (1997), NEHRP Guidelines for the Seismic Rehabilitation of Buildings, FEMA-273, Federal Emergency Management Agency, Washington, D.C
  7. Chopra, A.K. and Chintanapakee, C. (2004), 'Evaluation of modal pushover analysis using vertically 'regular' and 'irregular' generic frames', Earthq. Spectra, 20(1), 225-271 https://doi.org/10.1193/1.1646390
  8. Chopra, A.K. and Goel, R.K. (2001), 'A modal pushover analysis procedure for estimating seismic demands of buildings', Earthq. Eng. Struct. Dyn., 31, 561-582 https://doi.org/10.1002/eqe.144
  9. Goel, R.K. and Chopra, A.K. (2002), 'Evaluation of MPA procedure using SAC buildings', Journal of Structural Engineering, ASCE, Submitted for Publication
  10. Kishi, N. and Chen, W.F. (1986), Database for Steel Beam-to-Column Connections, CE-STR-86-26, School of Civ. Engrg., Purdue University, West Lafayette, Ind
  11. Krawinkler, H. and Seneviratna, G.D.P.K. (1998), 'Pros and cons of a pushover analysis of seismic performance evaluation', Eng. Struct. 20(4-6), 452-464 https://doi.org/10.1016/S0141-0296(97)00092-8
  12. Kunnath, S.K. and Gupta, B. (2000), 'Validity of deformation demand estimates using nonlinear static procedures', Proceeding of the U.S. Japan Workshop on Performance-Based Engineering for Reinforced Concrete Building Structures, Sapporo, Hokkaido, Japan
  13. Mofid, M., Zarfam, P. and Fard, B.R. (2005), 'On the modal incremental dynamic analysis', Struct. Des. Tall Especial Build., 14, 315-329 https://doi.org/10.1002/tal.271
  14. Sasaki, K.K., Freeman, S.A. and Paret, T.F. (1998), 'Multimode pushover procedure (MMP)-A method to identify the effect of higher modes in a pushover analysis', Proceeding of the 6th U.S. National Conference on Earthquake Engineering, Seattle, Washington
  15. UBC (2005), 'Structural engineering design provisions', Uniform Building Code, Vol. 2, International Conference of Building Officials

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  3. Nonlinear P-Δ analysis of steel frames with semi-rigid connections vol.14, pp.1, 2009, https://doi.org/10.12989/scs.2013.14.1.001