| dc.description.abstract | The Perning Kloji Bridge in Mojokerto Regency is considered unfit for
use due to the displacement of one of the pillars due to the collapse of the
retaining wall, making it necessary to replace the bridge. The bridge will
be replaced with a Prestressed Concrete I Girder (PCI Girder). The
bridge replacement has been planned by the service provider at a cost of
Rp1,133,300,230.21. It requires an appropriate method to determine a
more efficient cost.
Existing PCI girder planning with concrete quality f'c 68.60 MPa, span
50 m, girder height 2.1 m, and a total of 8 girders. Bridge structure
planning in this study only includes PCI girder calculations. The analysis
process was carried out with Microsoft Excel software. By using the same
load, existing modeling and 150 trials were carried out in accordance
with the design requirements, including deflection, moment stress, and
shear stress. Then ANN programming was continued with the input
variables used, including span length, concrete quality, steel quality,
strand diameter, number of strands, number of girders, and distance
between girders. While the outputs used for ANN programming are girder
height, moment, shear force, and cost.
ANN was used to predict the optimum PCI girder planning and proved by
comparing the optimization results with ANN program and existing
design. ANN prediction results have met the design requirements. The
existing design cost is Rp1,133,300,230.21 and after ANN programming
it is Rp 905,184,683.36, 20.13% cheaper than the existing bridge.
Comparison between ANN predictions and prediction results based on
empirical formulas obtained an error of 7.56% and from these results it
is still safe because < 10%, so it can be concluded that the results of ANN
predictions are more optimal than the existing. | en_US |
