DYNAMIC ANALYSIS OF THE BRASÍLIA ROAD PLATFORM THROUGH NUMERICAL SIMULATION AND MONITORING

Resumo

Brasilia, the first urban ensemble of the 20th century to be recognized as a World Heritage
by UNESCO, turns 60 years since your inauguration in 2020. Given this and considering that the
buildings in Brazil usually have a minimum design life of 50 years (standard reference time), routine
monitoring these structures is required to carry out preventive and corrective maintenance actions, as
required by the Model Code fib 2010. The Plano Piloto Bus Terminal of Brasília is composed of
Ground and Upper Platforms, two squares and an extensive slab-overhang, which holds stairs,
elevators, snack bars, magazine stands, taxi stand, etc. The slab-overhang, target of the test, is formed
by precast beams, placed next to each other, supported on frames of beams in prestressed concrete on
28 metallic pillars. From the monitoring of vibrations, through the use of four accelerometers, two
inclinometers, and one temperature gauge, it was possible to obtain the natural response frequencies of
the structure. With these results, the structural behavior was evaluated by the development of the
numerical model based on the finite element method, using elements in frames and shells. From this
assessment, it was concluded that, despite the need to repair the slab, so that its excessive deformation
is corrected - and thus providing greater visual comfort to the users - the structural performance of the
slab-overhang was satisfactory as for the natural vibration, allowing the normal use defined in design,
with the guarantee of user safety.