TITLE:
Analysis of the Cause for the Collapse of a Temporary Bridge Using Numerical Simulation
AUTHORS:
Changsung Kim, Jongtae Kim, Joongu Kang
KEYWORDS:
Flood Control Reservoir; Temporary Bridge; Numerical Simulation; Drag Force
JOURNAL NAME:
Engineering,
Vol.5 No.12,
December
2,
2013
ABSTRACT: The purpose of this
study was to suggest the measures and methods for securing the stability of
temporary bridges by analyzing the cause for the collapse of the temporary
bridge built for the construction of the GunNam flood control reservoir located at the main channel
of the Im-Jin River. Numerical simulations (one-, two-, and three-dimensional)
were performed by collecting field data, and the results showed that the
collapse occurred because the height of the temporary bridge was lower than the water
level at the time of the collapse. Also, the drag force calculation showed that
when the guardrail installed on the upper deck structure was not considered,
there was no problem as the calculated values were lower than the design load,
whereas when the guardrail was considered, the stability was not secured as the
calculated values
were higher than the design load, 37.73 kN/m. It is thought that the actual
force of the water flow applied on the bridge increased due to the accumulation of
debris on the guardrail as well as the upper deck.