000011375 001__ 11375
000011375 005__ 20141205155904.0
000011375 04107 $$aeng
000011375 046__ $$k2008-10-12
000011375 100__ $$aPrakash,Shanmugna.Suriya,
000011375 24500 $$aBehavior of RC Bridge Columns under Cyclic Flexural-Torsional Loadings with Moderate Shear

000011375 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011375 260__ $$b
000011375 506__ $$arestricted
000011375 520__ $$2eng$$aReinforced concrete (RC) bridge columns are subjected to a combined flexural, axial, shear and torsional loading during earthquake excitations. This fact is particularly true for skewed and curved bridges, and bridges with unequal spans or column heights. This combination of geometrical irregularities with seismic loading can result in complex flexural and shear failure of RC bridge columns. An experimental study is being conducted to understand the behavior of RC circular columns under combined loadings. The main variables being considered are (i) the ratio of torsion to bending moment (T/M), (ii) the ratio of bending moment to shear (M/V), and (iii) level of detailing for high and moderate seismicity (low or high transverse reinforcement ratio). The results of four columns with low aspect ratio (height to diameter = H/D=3) tested under cyclic pure bending, cyclic pure torsion, and various levels of combined cyclic bending and torsion in the presence of moderate shear loading are presented in this paper. The effects of combined loading on the hysteretic load-deformation response, spiral and longitudinal reinforcement strain variations, and spalling/damage characteristics are discussed. Torsion-Bending interaction diagrams for tested columns are presented. Based on the test results, it is concluded that the flexural as well as torsional capacity is decreased due to the effect of combined loading and there is also a change in the failure mode and deformation characteristics. The experiments show that the torsional capacity does not change significantly due to the effect of moderate shear compared to the columns under low shear. However, there is a significant reduction in the deformation and energy dissipation capacity due to the application of moderate shear compared to the similar columns tested at low shear.

000011375 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011375 653__ $$aBridges, RC columns, flexure, torsion, seismic design, combined loadings

000011375 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011375 720__ $$aPrakash,Shanmugna.Suriya,$$iBelarbi, Abdeldjelil$$iAyoub, Ashraf
000011375 8560_ $$ffischerc@itam.cas.cz
000011375 8564_ $$s400333$$uhttps://invenio.itam.cas.cz/record/11375/files/05-02-0083.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0083.
000011375 962__ $$r9324
000011375 980__ $$aPAPER