Penang Bridge Stay Replacement
A structural assessment of the 225-meter cable-stayed Penang Bridge in
Malaysia detected a bar break on one cable, leading to the replacement of 117
cables that were vulnerable to similar breaks. Atkins used RM Bridge to carry out
the global analysis of the structure, taking into account the staged construction
and effects of creep and shrinkage. Second order analysis, including the effects
of cracking, determined impacts on slender tower elements.
Having an accurate representation of the loading throughout each stage of
the replacement process was vital because the structure had to be kept open
to traffic. The bridge provides the only physical link between Penang Island
and mainland Malaysia. Atkins’ innovative maintenance strategy has been
passed on to the local Malaysian consultant on the project so the successful
replacement of the cables can be maintained in the future.
2010 BE INSPIRED AWARDS
RM Bridge allowed the stress buildup in the structure to be modeled effectively,
which in turn meant faster turnaround of approvals for checking work
during construction. The space frame model also enabled each of the cable
replacement stages to be modeled using the staged construction system. This
resulted in cost and time savings for the project.