Numerical investigation on the behavior of eccentrically
\nloaded lightweight reinforced concrete columns at
\nelevated temperature
\nHaitham Al-Thairy | Faaiza Al-Naqeeb
\nDepartment of Civil Engineering, College
\nof Engineering, University of
\nAl-Qadisiyah, Al Diwaniyah, Iraq
\nCorrespondence
\nHaitham Al-Thairy, Department of Civil
\nEngineering, College of Engineering,
\nUniversity of Al-Qadisiyah,
\nAl Diwaniyah, Iraq.
\nEmail: haitham.althairy@qu.edu.iq
\nAbstract
\nIn this paper, a numerical model is presented to simulate the behavior and failure
\nof lightweight reinforced concrete (LWRC) columns subjected to eccentric
\ncompressive load at elevated temperature using the finite element code
\nABAQUS. Validation of the numerical model was ensured throughout comparison
\nnumerical results with the available published experimental tests results.
\nThe validated numerical model was implemented in conducting extensive
\nparametric study to understand the effects of important parameters on the
\nresponse of eccentrically compressed LWRC column at elevated temperature.
\nThese parameters include the effect of concrete cover, the effect of exposure
\ntime, the effect of the exposed temperature, the effect of temperature distribution
\naround column section, the effect of temperature distribution along column
\nlength, and the effect of eccentricity ratio. The numerical results
\nindicated that increasing the concrete cover of the column section results a
\nconsiderable increasing of the ultimate load capacity. In addition, there is an
\nincrease in the ultimate load capacity when the temperature exposure time is
\nreduced to the half of the original exposure time. Whereas, if the exposure
\nperiod is increased to twice and three times the original exposure time, the
\nultimate load shows a slight decrease. Moreover, the ultimate load capacity of
\nthe LWRC column decreases when temperature is increased. Finally, the ultimate
\nload capacity increased of the LWRC column when the temperature is
\ndistributed over larger distance of the column length.<\/p>\n
<\/p>\n