PREDIKSI MASA GUNA ELEMEN STRUKTUR BETON AKIBAT PEMBEBANAN BERULANG
ABSTRACT: The problem
of life time
of concrete structural represent
matter which still
need furthermore research.
Existing formula still show
wide scatter and
the effect of
repeated load to
assumed not yet
satisfactored. In addition
only few articles on
journals has explored
the subject. This
research aimed to
evaluate and compare the
methods of calculating the maximum crack width between
EC 2 and ACI 318-02 codes. The research to be done to reinforced concrete
plates. The fracture mechanics method, the model mathematic method, and the
experiment result used to analyse maximum crack width (wmax). The fracture
mechanics method from Carpinteri used to analyse the initial crack depth and
the fatigue crack growth rate on structural beam of reinforced concrete. To
analyse the fatigue crack growth rate is used to Paris formula. The result
showed that at 10 Hz
load frequency, steel
stress ratio, reinforcement
ratio and repeated
load do affect
the maximum crack width until the bond fatigue limit state by three
linear model includes : (i) w = wo, (ii) w = A.e B.fs / fy . ( N – C.fs / fy
– D ) + wo , and (iii) w = wf = (E.fs /
fy + F). wo , where wo is the initial crack width and A, B, C, D, E, and F are
dimensionless coefficients that depend on the reinforcement ratio.
Keywords: crack width,
repeated load, bond fatigue
Penulis: Agoes Soehardjono MD
Kode Jurnal: jptsipildd090007
