Title : DAMAGE AND ENERGY DISSIPATION OF RC BRIDGE COLUMNS UNDER COMBINED LOADING INCLUDING TORSION
Authors : S. Suriya Prakash(1) and A. Belarbi(2)
Publication : 13th – 16th February 2013
Volume :
Pages : 10-Jan
Price : 250
Abstract : Reinforced concrete (RC) columns of skewed and curved bridges, and bridges with unequal spans and column heights can be subjected to combined loadings including axial, flexural, shear and torsional loadings during an earthquake. The combination of axial, bending, shear and torsion in RC bridge columns can result in complex failure modes. This paper presents the results of experimental and analytical studies investigating the damage and ductility characteristics of RC columns under combined loadings including torsion. The main variables considered are (i) the ratio of torsion to bending moment, (ii) the ratio of bending moment to shear, and (iii) level of detailing for high and moderate seismicity (low or high spiral ratio). The experimental results are used to develop and calibrate the design interaction equations. Based on the experimental results, damage and ductility models that account for the combined loading effects are also suggested from design point of view.