ABSTRACT
As the prices of building materials in the country continue to increase
sharply, there is growing need to source local materials as alternative for
farm building constructions. This project investigates the performance of a
cylindrical shell built of laterized concrete for storage of foodgrains or water.
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In order to optimize the mix ratio of the constituent materials that will
produce maximum strength, a mathematical model which relates the strength
of laterized concrete and its component ratios was developed using Scheffe's
simplex lattice approach. The optimum mix proportion obtained was used to
determine the structural characteristics of laterized concrete in the laboratory.
The values obtained for the material properties were applied in performing
the static analysis of the cylindrical shell structure under the action of
hydrostatic and foodgrain pressures using Pasternack's equations formulated
on the basis of theory of shell of revolution. The reduced equation of static
equilibrium was solved by the Initial-value method. A generalized solution of
the cylindrical shell made of laterized concrete was obtained and used to
evaluate the performance of the structure through the determination of
deflection and stresses. Adequate cross-section of the cylindrical shell was
determined.
The experimental data are very well fitted to the regression model,
which satisfies the student-t and chi-square tests. The optimum strength value
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of 2 7 N l d corresponding to an optimum mix proportion of 1 : 1 :2:0.650 of
cement, laterite, gravel and water-cement ratio respectively was predicted by
the model. For the structural characteristics, the values obtained for the
optimum mix ratio were higher than that obtained for the mix ratio of
1 :2:4:0.791. The results of the analysis indicate that the maximum stresses
developed due to hydrostatic loading is greater than the strength of the
laterized concrete in reservoir thickness of 5Omm, 1 Om in diameter and 5m in
height. The wall thickness of 100- was found adequate. The maximum
stress developed due to soybean grain loading is greater than the material
strength in silo thickness of 100mrn, 20m in diameter and 8m in height. The
wall thickness of 150mm was found adequate. Thus, the possibilities of using
laterized concrete in constructing cylindrical storage structures were successfully demonstrated.
, N & Ukamaka, T (2021). Static Analysis And Design Of Laterized Concrete Cylindrical Shells For Farm Storages. Afribary. Retrieved from https://track.afribary.com/works/static-analysis-and-design-of-laterized-concrete-cylindrical-shells-for-farm-storages
, NWAKONOBI and Theresa Ukamaka "Static Analysis And Design Of Laterized Concrete Cylindrical Shells For Farm Storages" Afribary. Afribary, 19 May. 2021, https://track.afribary.com/works/static-analysis-and-design-of-laterized-concrete-cylindrical-shells-for-farm-storages. Accessed 06 Nov. 2024.
, NWAKONOBI, Theresa Ukamaka . "Static Analysis And Design Of Laterized Concrete Cylindrical Shells For Farm Storages". Afribary, Afribary, 19 May. 2021. Web. 06 Nov. 2024. < https://track.afribary.com/works/static-analysis-and-design-of-laterized-concrete-cylindrical-shells-for-farm-storages >.
, NWAKONOBI and Ukamaka, Theresa . "Static Analysis And Design Of Laterized Concrete Cylindrical Shells For Farm Storages" Afribary (2021). Accessed November 06, 2024. https://track.afribary.com/works/static-analysis-and-design-of-laterized-concrete-cylindrical-shells-for-farm-storages