ABSTRACT
This work
developed a numerical model for determining the dynamic response of a concert
high-rise flexible frames (tall frame) subjected to wind load in Nigeria. The
model was based on the finite element idealization for flexible frames, static
condensation and lumped mass parameters. A MATLAB program was developed for the
model and two investigations were carried out. Firstly, an investigation was
carried out to determine the level of significance of the dynamic response for
design purposes in Nigeria. To this end, the developed MATLAB program was used
to determine the dynamic and static responses of four structures, of various
heights (29.2m to 72.4m) and floors (8 to 20) respectively. An assumed wind
velocity of 15m/s was considered for safety reasons since the actual maximum
wind velocity in Nigeria is less than 10m/s. The responses considered included
floor translations, axial force, bending moment and shear force. The percentage
difference between static and dynamic response as well as their level of significance
were determined. Based on the results it was inferred that dynamic analysis of
tall building below 72.4m in height and width not exceeding 13m, could be
ignored in Nigeria provided that the static analysis is done properly, with
appropriate code provisions. Secondly, the effect of increase in width and
height on the fundamental natural frequency of tall frames was also
investigated, requiring the addition of three frames, namely Frame 5, Frame 6,
Frame 7 all of which have the same height of 29.2m but vary in width from 13m
to 28m. Analysis results showed that the fundamental natural frequency
increases with increase in width at constant height and decrease with increase
in height at constant width.
JOHNSON, U (2022). Dynamic Response Of Tall Frames Subjected To Wind Load In Nigeria. Mouau.afribary.org: Retrieved Dec 25, 2024, from https://repository.mouau.edu.ng/work/view/dynamic-response-of-tall-frames-subjected-to-wind-load-in-nigeria-7-2
UGOCHUKWU, JOHNSON. "Dynamic Response Of Tall Frames Subjected To Wind Load In Nigeria" Mouau.afribary.org. Mouau.afribary.org, 28 Nov. 2022, https://repository.mouau.edu.ng/work/view/dynamic-response-of-tall-frames-subjected-to-wind-load-in-nigeria-7-2. Accessed 25 Dec. 2024.
UGOCHUKWU, JOHNSON. "Dynamic Response Of Tall Frames Subjected To Wind Load In Nigeria". Mouau.afribary.org, Mouau.afribary.org, 28 Nov. 2022. Web. 25 Dec. 2024. < https://repository.mouau.edu.ng/work/view/dynamic-response-of-tall-frames-subjected-to-wind-load-in-nigeria-7-2 >.
UGOCHUKWU, JOHNSON. "Dynamic Response Of Tall Frames Subjected To Wind Load In Nigeria" Mouau.afribary.org (2022). Accessed 25 Dec. 2024. https://repository.mouau.edu.ng/work/view/dynamic-response-of-tall-frames-subjected-to-wind-load-in-nigeria-7-2