Evaluation of Full-Scale Concrete Frames Exposed to Natural Fires at Early Ages.
This article presents the evaluation of full scale reinforced concrete frames subjected to natural fire at early age. The test program consisted of constructing three large frames of reinforced concrete as well as revealing them to the natural fire by shooting their formwork when the age of concrete achieves three and five days. The evaluation of reinforced concrete frames was done by the load test method as described in the American Concrete Institute (ACI), namely the 24 hrs load test method, which is evaluation criteria that have been in use for several decades. For each frame, the structural evaluation based on deflection criteria is discussed. Results showed that the frame exposed early to natural fire was generally more affected than the other frame, as its midspan deflection was increased to about 109% if compared to frame not exposed to fire.
BIKHIET, M. M., EL-SHAFEY, N. F. & EL-HASHIMY, H. M. 2014. Behavior of reinforced concrete short columns exposed to fire. Alexandria Engineering Journal, 53, 643-653.
BISBY, L., GALES, J. & MALUK, C. 2013. A contemporary review of large-scale non-standard structural fire testing. Fire science reviews, 2, 1.
CHEN, B., LI, C. & CHEN, L. 2009. Experimental study of mechanical properties of normal-strength concrete exposed to high temperatures at an early age. Fire Safety Journal, 44, 997-1002.
COMMITTEE, A. & STANDARDIZATION, I. O. F. Building code requirements for structural concrete (ACI 318-19) and commentary. 2019. American Concrete Institute.
ELBATANOUNY, M., ZIEHL, P., LAROSCHE, C. & NANNI, A. 2015. Load Testing Techniques for the Strength Evaluation of Existing Reinforced Concrete Structures. Forensic Engineering 2015.
GALATI, N., NANNI, A., GUSTAVO TUMIALAN, J. & ZIEHL, P. H. 2008. In-situ evaluation of two concrete slab systems. I: Load determination and loading procedure. Journal of Performance of Constructed Facilities, 22, 207-216.
KHOURY, G. 1992. Compressive strength of concrete at high temperatures: a reassessment. Magazine of concrete Research, 44, 291-309.
KHOURY, G., ANDERBERG, Y., BOTH, K., FELLINGER, J., HØJ, N. & MAJORANA, C. 2007. Fib bulletin 38: fire design of concrete structures—materials, structures and modelling, state-of-the art report. Federation internationale du beton, Lausanne, Switzerland.
KIRCHHOF, L. D., LORENZI, A. & SILVA FILHO, L. C. P. 2015. Assessment of Concrete Residual Strength at High Temperatures using Ultrasonic Pulse Velocity. The e-Journal of Nondestructive Testing, 20.
LU, L., YUAN, G., SHU, Q., HUANG, Z., ZHONG, C. & XU, B. 2019. Bond behaviour between early age concrete and steel bar subjected to cyclic loading after fire. Fire Safety Journal, 105, 129-143.
PUCINOTTI, R. 2015. Reinforced concrete structure: Non destructive in situ strength assessment of concrete. Construction and Building Materials, 75, 331-341.
SCHNEIDER, U. 1988. Concrete at high temperatures—a general review. Fire safety journal, 13, 55-68.
XIAO, J. & KÖNIG, G. 2004. Study on concrete at high temperature in China—an overview. Fire safety journal, 39, 89-103.
Copyright (c) 2020 muhammad ismaiel omer, Dilshad Kakasoor Jaf
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
At Zanco Journal, we're dedicated to protecting your rights as an author, and ensuring that any and all legal information and copyright regulations are addressed. Whether an author is published with Zanco Journal or any other publisher, we hold ourselves and our colleagues to the highest standards of ethics, responsibility and legal obligation