ANALISIS STRUKTUR BOX GIRDER JEMBATAN FLY OVER RAWA BUAYA SISI BARAT TERHADAP GEMPA
ABSTRACT: The Rawabuaya
flyover bridge is an option to overcome the traffic jam that often happens in
the Rawabuaya area. It has an extremely vital function to disentangle the
traffic congestion; therefore, the structure mustbe strong in holding the
on-going load, specifically the seismic load. The seismic load is dangerous to
a structure because it has period that causes the structure to repeatedly
shaken. If the movements happened continually, the structure will collapse ―
depending on how much earthquake load that is being loaded onthe structure.
Therefore, it is essential to conduct a structural analysis on the earthquake
resistance level of the Rawabuaya flyover bridge based on the "Standar
Perencanaan Ketahanan Gempa Untuk StrukturBangunan Gedung dan Non-Gedung"
RSNI 03-1726-2010 and "Peta Zonasi Gempa Indonesia 2010" to know
further about the on-going deformation. This research was done thoroughly by
recognizing the maximum forces in the combination of ultimate loads based on
the most recent rules of encumbering, including the rules regarding the seismic
load. The maximum forces in the combination of ultimate loads were compared
with the forces' nominal values, especially those related to the seismic load.
From the research, it was concluded that the values of the maximum forces in
the combination of ultimate loads hadthe combined seismic load worked on the
upper structure of box girder as well as on the structure beneath the pier of
Rawabuaya flyover bridge with a maximum moment values of 800300.80 KNm applied
to Pier P6B with the combination of the singular ultimate load, additional dead
load, pre-stressed load, and “T”truck load. Impairment to the structure was
found to happen if the combination of the ultimate load was forced to work
continuously on the Rawabuaya flyover bridge. Meanwhile, the result of the
compared maximum forces in the combination of ultimate load with the values of
nominal forces indicated that the Rawabuaya flyover bridge had a large amount
of seismic load with 10% difference. It meant that this structure was able to
resist 90% of ultimate seismic load, which required the usage of reinforcements
on the upper structure of box girder as well as on the structure beneath the
pier to increase the concrete stress power and the tendon on the upper
structure of box girder to increase the tensile of the concrete.
Penulis: Aditya Fajar
Meidiansyah, M. Yanuar J. Purwanto, M. Fauzan
Kode Jurnal: jptsipildd160448
