Capacity of Grout- Filled Steel Beam under Flexural Cyclic Load

In civil engineering applications, hollow section beams are extensively used mainly in
the construction industry and offshore structures. After several years of usage, the
structures undergo damage and suffer corrosion thus requiring regular maintenance. One
of the methods to rectify this problem is mulling with grout in the steel hollow sections.
This study is to determine the flexural behavior of grout-filled steel hollow section
beams in offshore applications. The characteristics of the grout-filled steel beams which
include high ductility, strength, and greater energy absorption capacity have made these
composite beams become popular in civil engineering. Extensive research works to
study the capacity of grout-filled steel beams have been carried out. However, studies on
the behavior of grout-filled steel beams under flexural cyclic load have not been
observed in the literature where such problem can arise when the moment induced
during earthquakes and the vibration of the machineries could cause some effects on the
beams which would reduce the service life of the beams. In the present study, therefore
an attempt has been made to study the behavior of grout-filled steel beams subjected to
flexural cyclic load under different parameters which include the D/t ratio and also the
stiffness of the beams which would affect the bonding strength of the grout with the
beams. The relationship between the different strength of flexural cyclic load and the
number of'cycles to failure would be investigated.