ABSTRACTS
A box girder
bridge is a special case of folded plate with closed cross section. Box girder
bridges have proved to be very efficient structural solution for medium and
long span bridges. Thin-walled box girder bridges are most economical. There
are three box girder configurations commonly used in practice. Box girders can
be constructed as Single cell (one box), multi-spine cell (separate boxes) or
multi-cell (contiguous boxes or cellular shape). Analytically, however, the box
girder bridge is a complex indeterminate problem. Several researches have been
carried out on advanced analytical methods of analyzing thin-walled box girder
bridge for many years in order to better understand the behavior of all types
of box-girder bridges, the results of these different research works are
dispersed and undervalued. Therefore, existing methods for analyzing box girder
bridges need to be improved; such improvements will either seek to simplify
existing methods or attempt to improve results accuracy. The present work
introduced the structural analysis of box girder bridges using Higher Order
(HO4) Finite Strip which is an improvement to the existing higher order HO3
type. On account of its complexity, a MATLAB Computer program for determining
structural response of thin-walled box girder bridges was developed using
Higher Order (HO4) Flat Shell Strip. A simply supported thin-walled multi-cell
box girder bridge was be adopted as the analytical structure. Validation of the
theoretical formulations, which is synthesized in the proposed higher order
(H04) finite strip computer program, was carried out by comparing the results
obtained using the developed program with beam theory solution and the
theoretical analysis results in published literature. Using three prototype
models of simply supported thin-walled multi-cell box girder bridge i.e. model
1 (two-cell), model 2 (three-cell) and model 3 (four-cell) a numerical study of
displacement and stress distributions was carried out to demonstrate the
application of the theoretical formulations and developed computer program to
the analysis of a typical simply supported thin-walled multi-cell box girder
bridge subjected to vehicular loads. The analysis results were compared to the
beam theory solution which does not include the effects of shear deformation.
Results of analysis showed, among other findings that the effect of shear
deformation were more in deflection than in stresses. Based on the results of
analysis, distribution of stresses were studied, it was observed that the
bending moments are resisted mainly by flanges whereas the shear stresses are
resisted mainly by the webs. Investigating the effect of number of cells in a
reinforced concrete box girder bridge using the developed model, the analysis
results as presented in Tables (4.4, 4.5, 4.6, 4.11 - 4.19) and Figs.(4.4 –
4.12) showed that the Model 3 (four-cell) is the most efficient of the three
prototype model in terms of strength properties – deflection and stress
distribution. However, it will be more costly in construction than the other
two. Therefore, the principles and programs developed in this research could be
used in practice for the analysis of simply supported thin-walled multi-cell
box girder bridge, box beam and folded plate structures.
DIMONYEKA, D (2022). Higher Order (Ho4) Finite Strip Analysis Of Simply Supported Thin-Walled Box Girder Bridge Subjected To Vehicular Load. Mouau.afribary.org: Retrieved Dec 25, 2024, from https://repository.mouau.edu.ng/work/view/higher-order-ho4-finite-strip-analysis-of-simply-supported-thin-walled-box-girder-bridge-subjected-to-vehicular-load-7-2
DIMONYEKA, DIMONYEKA. "Higher Order (Ho4) Finite Strip Analysis Of Simply Supported Thin-Walled Box Girder Bridge Subjected To Vehicular Load" Mouau.afribary.org. Mouau.afribary.org, 27 Oct. 2022, https://repository.mouau.edu.ng/work/view/higher-order-ho4-finite-strip-analysis-of-simply-supported-thin-walled-box-girder-bridge-subjected-to-vehicular-load-7-2. Accessed 25 Dec. 2024.
DIMONYEKA, DIMONYEKA. "Higher Order (Ho4) Finite Strip Analysis Of Simply Supported Thin-Walled Box Girder Bridge Subjected To Vehicular Load". Mouau.afribary.org, Mouau.afribary.org, 27 Oct. 2022. Web. 25 Dec. 2024. < https://repository.mouau.edu.ng/work/view/higher-order-ho4-finite-strip-analysis-of-simply-supported-thin-walled-box-girder-bridge-subjected-to-vehicular-load-7-2 >.
DIMONYEKA, DIMONYEKA. "Higher Order (Ho4) Finite Strip Analysis Of Simply Supported Thin-Walled Box Girder Bridge Subjected To Vehicular Load" Mouau.afribary.org (2022). Accessed 25 Dec. 2024. https://repository.mouau.edu.ng/work/view/higher-order-ho4-finite-strip-analysis-of-simply-supported-thin-walled-box-girder-bridge-subjected-to-vehicular-load-7-2