Analysis of the Cause(s) of the Collapse of a 3-Storey Building in Ile-Ife, Osun State, Nigeria [ READ ]
Ogunbiyi, Moses A., Olawale, S. O., Olayiwola, T. B., Akinola, S. R., Bamgboye, O. A
This study sets out to investigate the remote cause(s) leading to the collapse of a 3-Storey Building in Ile-Ife. The study analyzed the original design submitted for approval and construction, the report of the Lagos State Materials Testing Laboratory (LSMTL) and the research re-design of the Structural elements required for the stability of the building. The results show that the building was under-designed in critical areas of the building elements such as; columns, beams, and slabs. Also, the contractor did a shoddy work either out of greed, incompetence or lack of experience. It was also, noted that inappropriate materials were used by the contractor in the construction of the building. Reinforcement provided at the first, second and third floors of the building were adequate but the design did not take into consideration hogging and cantilevers. This may result in over-turning leading to collapse of the building. The results show that the reinforcement bars provided for the beams were inadequate; it was also observed that the characteristic compressive strength; fcu(20N/mm2) recommended for reinforced concrete was not met by the constructors. The survey therefore concludes that; under-design, use of low grade concrete, poor concrete mix, poor workmanship, lack of proper supervision among other things contributed to the demise of the 3-storey building.
Ogunbiyi, Moses A., Olawale, S. O., Olayiwola, T. B., Akinola, S. R., Bamgboye, O. A
This study sets out to investigate the remote cause(s) leading to the collapse of a 3-Storey Building in Ile-Ife. The study analyzed the original design submitted for approval and construction, the report of the Lagos State Materials Testing Laboratory (LSMTL) and the research re-design of the Structural elements required for the stability of the building. The results show that the building was under-designed in critical areas of the building elements such as; columns, beams, and slabs. Also, the contractor did a shoddy work either out of greed, incompetence or lack of experience. It was also, noted that inappropriate materials were used by the contractor in the construction of the building. Reinforcement provided at the first, second and third floors of the building were adequate but the design did not take into consideration hogging and cantilevers. This may result in over-turning leading to collapse of the building. The results show that the reinforcement bars provided for the beams were inadequate; it was also observed that the characteristic compressive strength; fcu(20N/mm2) recommended for reinforced concrete was not met by the constructors. The survey therefore concludes that; under-design, use of low grade concrete, poor concrete mix, poor workmanship, lack of proper supervision among other things contributed to the demise of the 3-storey building.
