Characterization of Equivalent Struts for Macromodeling of Infilled Masonry RC Frames Subjected to Lateral Load
Publication: Journal of Structural Engineering
Volume 145, Issue 5
Abstract
Evaluation of the seismic performance of infill frame structural systems using equivalent strut models and pushover analysis has gained popularity due to the simplicity of the evaluation process. Various strut macromodels have been developed for both static and dynamic evaluation of the behavior of the infill frames when subjected to seismic loading. Comparative studies of existing models revealed varying degrees of accuracy, with more detailed models able to produce better results due to improved material characterization and geometric configurations. The variations in the accuracy of model predictions can be linked to the simplifications adopted and/or variances from material behavior modeling of the infill masonry and frame. This paper provides a new approach for developing equivalent strut material and geometric properties that incorporate the behavior of dominant stress zones within the infill. The proposed equivalent strut is represented by dominant stress zones, modeled as nonlinear springs with specific characteristics derived from the dominating stress, and it connects these stress zones either as series or parallel elements. A parametric evaluation of the proposed model was conducted using numerical methods. The performance of the proposed model was validated using experimental data taken from literature. The results show good correlation of the proposed model with the experimental data.
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Acknowledgments
The research work was carried under financial support through the Centre for Development of Sustainable Infrastructure of the Department of Civil Engineering at Stellenbosch University.
References
Adukadukam, A., and A. Sengupta. 2013. “Equivalent strut method for modelling of masonry infill walls in the nonlinear static analysis.” J. Inst. Eng. (India) Series A 94 (2): 99–108. https://doi.org/10.1007/s40030-013-0042-y.
Asteris, P., D. Kakaletsis, C. Chrysostomou, and E. Smyrou. 2011. “Failure modes of in-filled frames.” Electron. J. Struct. Eng. 11 (1): 11–20.
Bazan, E., and R. Meli. 1980. “Seismic analysis of structures with masonry ifill walls.” In Vol. 5 of Proc., 7th World Conf. on Earthquake Engineering, 633–640. Instanbul, Turkey.
Crisafulli, F. J. 1997. Seismic behaviour of reinforced concrete structures with masonry infills. Christchurch, New Zealand: Univ. of Canterbury.
Decanini, L., and G. Fantin. 1987. “Modelos simplificados de la mamposteria includia en porticos. Caracteristicas de rigidezy resistencia lateral en estado limite.” [In Spanish.] Jornadas Argentinas de Ingenieria Estructural 2: 817–836.
El-Dakhakhni, W., M. Elgaaly, and A. A. Hamid. 2003. “Three-strut model for concrete masonry-infilled steel frames.” J. Struct. Eng. 129 (2): 177–185. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:2(177).
FEMA. 2000. Prestandard and commentary for the seismic rehabilitation of buildings. FEMA 356. Washington, DC: FEMA.
Holmes, M. 1961. “Steel frames with brick and concrete filling.” Proc. Inst. Civ. Eng. 19 (4): 473–478. https://doi.org/10.1680/iicep.1961.11305.
Kaushik, H., D. Rai, and S. Jain. 2007. “Stress-strain characteristics of clay brick masonry under axial compression.” J. Mater. Civ. Eng. 19 (9): 728–739. https://doi.org/10.1061/(ASCE)0899-1561(2007)19:9(728).
Kent, D., and R. Park. 1971. “Flexural members with confined concrete.” J. Struct. Div. 97 (7): 1969–1990.
Liauw, T., and K. Kwan. 1985. “Unified plastic analysis for infilled frames.” J. Struct. Eng. 111 (7): 1427–1448. https://doi.org/10.1061/(ASCE)0733-9445(1985)111:7(1427).
Lotfi, H., and P. Shing. 1994. “An interface model applied to fracture of masonry structures.” J. Struct. Eng. 120 (1): 63–80. https://doi.org/10.1061/(ASCE)0733-9445(1994)120:1(63).
Mainstone, R. J. 1971. “On the stiffnesses and strengths of infilled frames.” In Vol. 4 of Proc., Institution of Civil Engineers, Supplement, 57–90. Garston, UK: Building Research Station.
Mbewe, P. 2018. Nonlinear truss modelling of masonry infill frames towards sustainable residential buildings. Stellenbosch, South Africa: Dept. of Civil Engineering, Stellenbosch Univ.
Mehrabi, A., P. Shing, M. Schuller, and J. Noland. 1996. “Experimental evaluation of masonry-infilled RC frames.” J. Struct. Eng. 122 (3): 228–237. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:3(228).
Paulay, T., and M. Priestley. 1992. Seismic design of reinforced concrete and masonry buildings. New York: Wiley.
Radić, I., D. Markulak, and V. Sigmund. 2016. “Analytical modelling of masonry-infilled steel frames.” Tech. Gaz. 23 (1): 115–127. https://doi.org/10.17559/TV-20150528133754.
Rodrigues, H., H. Varum, and A. Costa. 2010. “Simplified macro-model for infill masonry panels.” J. Earthquake Eng. 14 (3): 390–416. https://doi.org/10.1080/13632460903086044.
Saneinejad, A., and B. Hobbs. 1995. “Inelastic design of infilled frames.” J. Struct. Eng. 121 (4): 634–650. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:4(634).
Schnobrich, W. 1985. Role of finite element analysis of reinforced concrete structures, 1–24. New York: ASCE.
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©2019 American Society of Civil Engineers.
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Received: Nov 17, 2017
Accepted: Oct 24, 2018
Published online: Mar 13, 2019
Published in print: May 1, 2019
Discussion open until: Aug 13, 2019
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