Assessment of MIDA method for mid-rise steel structures with non-symmetrical plan

Document Type : Article

Authors

Department of Civil Engineering, Sharif University of Technology, Tehran, Iran

Abstract

Determination of nonlinear dynamic behavior of structures has always been one of the main goals for both structural and earthquake engineers. One of the newest methods for analyzing seismic behavior of structures is Modal Incremental Dynamic Analysis (MIDA). In fact, this method is an alternative to the Incremental Dynamic Analysis (IDA) which is a difficult and time-consuming method. Despite the MIDA's approximate results, advantages such as adequate accuracy, high speed, and low cost has made this method an efficient and appropriate approach. In all previous studies, the proposed models have had a regularized plan, hence, all the analyses have been carried out on a frame. In this study, the MIDA analysis is developed in an unsymmetric-plan type building by considering three structures with 4, 7, and 10 stories having irregularity in plan and thereafter, the accuracy of work has been examined. In this study, by a simplification, instead of considering an unconventional plan, we used a rectangular plan with an eccentricity of 15% between the center of mass and the center of rigidity. Comparing the results of this study with the IDA method proves the high level of accuracy of this method in assessing seismic demands.

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References

References:
1. Sasaki, K.K., Freeman, S.A., and Paret, T.F. "Multimode pushover procedure (MMP)-A method to identify the effects of higher modes in a pushover analysis", Proceedings of the 6th US National Conference on Earthquake Engineering, 620(10), Seattle,Washington (1998).
2. Moghadam, A.S. and Tso, W.K. "A pushover procedure for tall buildings", Proc. of the Twelfth European Conference on Earthquake Engineering, London, United Kingdom, Paper. No. 395 (2002).
3. Chopra, A.K. and Goel, R.K. "A modal pushover analysis procedure for estimating seismic demands for buildings", Earthquake Engineering & Structural Dynamics, 31(3), pp. 561-582 (2002).
4. Bergami, A.V., Forte, A., Lavorato, D., and Nuti, C. "Proposal of a incremental modal pushover analysis (IMPA)", Earthq. Struct, 13, pp. 539-549 (2017).
5. Pan, X., Zheng, Z., and Wang, Z. "Estimation of floor response spectra using modified modal pushover analysis", Soil Dynamics and Earthquake Engineering, 92, pp. 472-487 (2017).
6. Hashemi, M.J. and Mofid, M. "Evaluation of energybased modal pushover analysis in reinforced concrete frames with elevation irregularity", Scientia Iranica. Transaction A, Civil Engineering, 17(2), pp. 96-106 (2010).
7. Chopra, A.K. and Goel, R.K. "A modal pushover analysis procedure to estimate seismic demands for unsymmetric-plan buildings", Earthquake Engineering & Structural Dynamics, 33(8), pp. 903-927 (2004).
8. Reyes, J.C. and Chopra, A.K. "Three-dimensional modal pushover analysis of buildings subjected to two components of ground motion, including its evaluation for tall buildings", Earthquake Engineering & Structural Dynamics , 40(7), pp. 789-806 (2011).
9. Reyes, J.C. and Chopra, A.K. "Evaluation of threedimensional modal pushover analysis for unsymmetricplan buildings subjected to two components of ground motion", Earthquake Engineering & Structural Dynamics, 40(13), pp. 1475-1494 (2011).
10. Poursha, M., Khoshnoudian, F., and Moghadam, A.S. "A consecutive modal pushover procedure for nonlinear static analysis of one-way unsymmetric-plan tall building structures", Engineering Structures, 33(9), pp. 2417-2434 (2011).
11. Poursha, M., Khoshnoudian, F., and Moghadam, A.S. "The extended consecutive modal pushover procedure for estimating the seismic demands of two-way unsymmetric-plan tall buildings under influence of two horizontal components of ground motions", Soil Dynamics and Earthquake Engineering, 63, pp. 162- 173 (2014).
12. Poursha, M. and Samarin, E.T. "The modified and extended upper-bound (UB) pushover method for the multi-mode pushover analysis of unsymmetric-plan tall buildings", Soil Dynamics and Earthquake Engineering, 71, pp. 114-127 (2015).
13. Reyes, J.C., Riano, A.C., Kalkan, E., and Arango, C.M. "Extending modal pushover-based scaling procedure for nonlinear response history analysis of multistory unsymmetric-plan buildings", Engineering Structures, 88, pp. 125-137 (2015).
14. Tarbali, K. and Shakeri, K. "Story shear and torsional moment-based pushover procedure for asymmetricplan buildings using an adaptive capacity spectrum method", Engineering Structures, 79, pp. 32-44 (2014).
15. Belejo, A. and Bento, R. "Improved modal pushover analysis in seismic assessment of asymmetric plan buildings under the influence of one and two horizontal components of ground motions", Soil Dynamics and Earthquake Engineering, 87, pp. 1-15 (2016).
16. Soleimani, S., Aziminejad, A., and Moghadam, A.S. "Extending the concept of energy-based pushover analysis to assess seismic demands of asymmetric-plan buildings", Soil Dynamics and Earthquake Engineering, 93, pp. 29-41 (2017).
17. Bertero, V.V. "Strength and deformation capacities of buildings under extreme environments", Structural Engineering and Structural Mechanics, 53(1), pp. 29- 79 (1977).
18. Brunesi, E., Nascimbene, R., Parisi, F., and Augenti, N. "Progressive collapse fragility of reinforced concrete framed structures through incremental dynamic analysis", Engineering Structures, 104, pp. 65-79 (2015).
19. Zhou, Y., Ge, P., Li, M., and Han, J. "An areabased intensity measure for incremental dynamic analysis under two-dimensional ground motion input", The Structural Design of Tall and Special Buildings, 26(12), p. e1374 (2017).
20. Jalili Sadr Abad, M., Mahmoudi, M., and Dowell, E. "Novel technique for dynamic analysis of shear-frames based on energy balance equations", Scientia Iranica (2018) (In press). DOI: 10.24200/sci.2018.20790. 
21. Mofid, M., Zarfam, P., and Fard, B.R. "On the modal incremental dynamic analysis", The Structural Design of Tall and Special Buildings, 14(4), pp. 315- 329 (2005).
22. Han, S.W. and Chopra, A.K. "Approximate incremental dynamic analysis using the modal pushover analysis procedure", Earthquake Engineering & Structural Dynamics, 35(15), pp. 1853-1873 (2006).
23. Zarfam, P. and Mofid, M. "On the modal incremental dynamic analysis of reinforced concrete structures, using a trilinear idealization model", Engineering Structures, 33(4), pp. 1117-1122 (2011).
24. ASCE/SEI 7-10, Minimum Design Loads for Buildings and Other Structures, American Society of Civil Engineers (2010).
25. AISC Committee, Specification for Structural Steel Buildings (ANSI/AISC 360-10), American Institute of Steel Construction, Chicago-Illinois (2010).
26. Standard No. 2800-05, Iranian Code of Practice for Seismic Resistant Design of Buildings, 4th Edition, Iran Building and Housing Research Centre; (2014).
27. Charney, F.A., Seismic Loads: Guide to the Seismic Load Provisions of ASCE 7-10, American Society of Civil Engineers (2015).
Scientia Iranica
Volume 26, Issue 5
Transactions on Civil Engineering (A)
September and October 2019
Pages 2703-2711

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History

  • Receive Date: 24 May 2017
  • Revise Date: 09 May 2018
  • Accept Date: 11 March 2019

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