Analysis of Incidences of Collapsed Buildings in the City of Douala, Cameroon from 2011-2020
Authors: T. G. L. J. Bikoko, J. C. Tchamba, S. Amziane
This study focuses on the problem of collapsed buildings within the city of Douala over the past ten years, and more precisely within the period from 2011 to 2020. It was carried out in a bid to ascertain the real causes of this phenomenon, which has become recurrent in the leading economic city of Cameroon. To achieve this, it was first necessary to review some works dealing with construction materials and technology as well as some case histories of structural collapse within the city. Thereafter, a statistical study was carried out on the results obtained. It was found that the causes of building collapses in the city of Douala are: Neglect of administrative procedures, use of poor quality materials, poor composition and confectioning of concrete, lack of Geotechnical study, lack of structural analysis and design, corrosion of the reinforcement bars, poor maintenance in buildings, and other causes. Out of the 46 cases of failure and collapse of buildings within the city of Douala, 7 of these were identified to have had no geotechnical study carried out, giving a percentage of 15.22%. It was also observed that out of the 46 cases of structural failure, 6 were as a result of lack of proper structural analysis and design giving a percentage of 13.04%. Subsequently, recommendations and suggestions are made in a bid to placing particular emphasis on the choice of materials, the manufacture and casting of concrete as well as the placement of the required reinforcements. All this guarantees the stability of a building.
Keywords: collapse buildings, Douala, structural collapse, CameroonProcedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 590
 Tchamba J. C., and Bikoko, T. G. L. J., “Failure and collapse of building structures in the cities of Yaoundé and Douala, Cameroun,” from 2010 to 2014. Modern Applied Science, 10(1), pp 23-33, 2016.
 T. G. L. J. Bikoko, Jean Claude Tchamba, Felix Ndubisi Okonta, “A Comprehensive Review of Failure and Collapse of Buildings/Structures,” International Journal of Civil Engineering and Technology 10(3), pp. 187–198, 2019.
 A. A. Taiwo, J. A. Afolami “Incessant building collapse: A case of a hotel in Akure, Nigeria,” Journal of Building Appraisal 6, 241-248 (2011).
 Ogunseemi (ed) Proceedings on building Collapse: Causes, Prevention and Remedies Ondo State, Nigeria: The Nigerian Institute of Building, pp. 110-121.
 Folagbade, S. O. “Case studies of building collapse in Nigeria,” In D.R.
 Richard, R. L. (2002) Leading the Way in Concrete Repair and Protection Technology, Vol.1, Costa Rica: Concrete repair Association, pp.1.
 T. G. L. J. Bikoko and J. C. Tchamba, “Causes of Failure and Collapse of Building Structures in Cameroonian Cities,” Academic Journal of Civil Engineering 10(3), pp. 187–198, 2019.
 Mohammed Almarwae (2017) “Structural Failure of Buildings: Issues and Challenges ,” World Scientific News WSN 66 (2017) pp. 97-108
 A. W. Cobrun, R. J. S. Spence and A. Pomonis “Factors determining human casualty levels in earthquakes: Mortality prediction in building collapse,” Earthquake Engineering, tenth World Conference Balkema, Rotterdam. Pp. 5989-5994, 1992.
 KhobiziSena, “Réhabilitation des structures en béton armé” mémoire présenté et soutenu en vue d’obtention du Master en génie civil, option structures, 2017.
 Bikoko, T. G. L. J. (2021). “A Cameroonian Study on Mixing Concrete with Wood Ashes: Effects of 0-30% Wood Ashes as a Substitute of Cement on the Strength of Concretes,” Revue des Composites et des Matériaux Avancés, In Press.
 Alinaitwe, H. M., and Ekolu, S .O. (2014). “ Failure of Structures in East Africa with focus on the causes of failures in the construction phase.,” In S. O. Ekolu et al. (Eds.), Proceedings of the First International Conference on Construction Materials and Structures, 24-26 November, 2014, Johannesburg, South Africa, 76-85.
 D. Pradeep Kumar and Abraham Biable, “Experimental Investigation on the Effect of Compressive Strength of Concrete Due to Delay in Pouring Concrete, ” International Journal of Advanced Research in Engineering and Technology, 11(9), 2020, pp. 448-456.
 Liu Y., and R. E. Weyers,’ “Modeling of the Time to Corrosion Cracking in Chloride Contaminated Reinforced Concrete Structures,” ACI Materials Journal, Vol 95, pp.675-681, 1998.
 T. A. El Maaddawi and K. A. Soudhi, “Effectiveness of Impressed Current Technique to simulate Corrosion of Steel Reinforcement in Concrete,” Journal of Materials in Civil Engineering, January/February, 2003.