Experimental Validation of a One-Strut Model (OSM) for Infilled RC Concrete Frames

International Journal of Civil Engineering

© 2017 by SSRG - IJCE Journal

Volume 4 Issue 1

Year of Publication : 2017

Authors : T.C. Nwofor

10.14445/23488352/IJCE-V4I1P105

How to Cite?

T.C. Nwofor, "Experimental Validation of a One-Strut Model (OSM) for Infilled RC Concrete Frames," SSRG International Journal of Civil Engineering, vol. 4,  no. 1, pp. ):36-40, 2017. Crossref, https://doi.org/10.14445/23488352/IJCE-V4I1P105

Abstract:

In this study, the area of a diagonal strut used to replace the infill panel and also simulates the effects of the opening sizes in the infill panel using the one-strut model (OSM) for macro-modeling infill frames developed by the author in previous research is validated with an experimental approach where typical one bay one storey test frames were constructed and tested to obtain the load - displacement profiles. The results show that the macro-modeling technique, which makes use of a modified one-strut model used to replace the infilled panel gave lateral displacements results which when compared with two other models gave a close correlation with a calculated average error between the test frame and the one-strut models as 5.5% while an average error of 3.97% was achieved when we compare the results from the FE and one-strut structural models. Hence, there was close agreement between the outputs of the proposed one-strut model and the test models used for validation.

Keywords:

Experimental validation, one-strut model, test model, finite element model, lateral displacement.

References:

1) Asteris, P.G. (2003). Lateral stiffness of brick masonry infilled plane frames. J. Struct, Eng., 129(8), 1071-1079.
2) Asteris, P.G., & Tzamtzis, A.D. (2002). Non-linear FE analysis of masonry shear walls. Proceedings of Shah International Masonry Conference. London.
3) Crisafulli F. J., & Carr A. J. (2007). Proposed macromodel for the analysis of infilled frame structures. Bull. N. Z. Soc. Earthquake Eng., 40(2) 69-77.
4) El-Dakhakhni, W. W., Mohamed E., & Ahmad H. (2003). Three-strut model for concrete masonry-infilled steel frames. Journal of Structural Engineering, 129 ( 2), 177-185.
5) Ephraim, M.E. (1999). Modeling techniques and instrumentation in laboratories. Unpublished lecture notes, Rivers State University of Science and Technology, Nigeria.
6) Ephraim, M.E. & Nwofor, T.C. (2015a). Development of a modified one-strut design model for shear strength of masonry infilled frames with opening. International Journal of Scientific and Engineering Research, 6(3), 136-144
7) Ephraim, M.E. & Nwofor, T.C. (2015b). Composite behaviour of unbraced multi-storey reinforced concrete infilled frames based on modified one-strut model. International Journal of Engineering Research and Applications, 5(4), 47-58.
8) Giannakas, A., Patronis, D., & Fardis, M.(1987). The influence of the position and size of openings to the elastic rigidity of infill walls. Proc. 8th Hellenic Concrete Conf., Xanthi, kavala, Greece, 49-56.
9) Mohammadi, M., & Nikfar, F. (2013). Strength and stiffness of masonry infilled frames with openings based on experimental result. Journal of Structural Engineering 139(6), 974-984.
10) Nwofor, T.C. (2011). Finite element stress analysis of brickmortar masonry under compression. Journal of Applied Science and Technology,16 (1&2), 33-37.
11) Nwofor, T.C. (2012). Numerical micro-modeling of masonry in filled frames. Advances in Applied Sciences Research, 4(2), 764-771.
12) Nwofor, T.C., & Chinwah, J.G. (2012). Shear strength of load bearing brickwork. Canadian Journal on Environmental, Construction and Civil Engineering, 3 (3),146-158.
13) Sabnis, G.M., Harris, H.G., White, R.N., & Saeed Mirza, M. (1983). Structural Modelling and Experimental Techniques. Prentice-Hall, Inc., Englewood Cliffs, N.J. 07632, USA
14) Saneinejad, A., & Hobbs. B. (1995). Inelastic design of infilled frames. Journal. Structural Engineering 121(4), 634-650
15) Syrmakezis, C. A., & Asteris, P. G. (2001). Masonry failure criterion under biaxial stress state. Journal Material and Civil. Engineering 13(1), 58–64.