000010906 001__ 10906
000010906 005__ 20141205155815.0
000010906 04107 $$aeng
000010906 046__ $$k2008-10-12
000010906 100__ $$aMatamoros, Adolfo B
000010906 24500 $$aAxial Load Failure of Shear Critical Columns Subjected to High Levels of Axial Load

000010906 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010906 260__ $$b
000010906 506__ $$arestricted
000010906 520__ $$2eng$$aThis paper discusses the experimental behavior of two lightly reinforced (shear-critical) columns subjected to high levels of axial load and lateral load reversals. The two full-scale experiments were carried out at the NEES-MAST facility at the University of Minnesota as part of a large study on the risk of collapse of older concrete buildings during major earthquakes. The goal of the experiments was to obtain data to improve simulations of buildings in which partial collapse and redistribution of vertical loads between columns takes place. Tests evaluated the behavior of two columns with ratios of nominal shear strength to plastic shear demand on the order of 0.85. The longitudinal and transverse reinforcement ratios were maintained constant, while the axial load ratio of each column was 0.3 and 0.2 f’c Ag, respectively. The two columns had a height of 2945 mm and cross section of 457 x 457 mm. The longitudinal reinforcement ratio was 2.5% and the transverse reinforcement consisted to No. 3 bars (9.5 mm diameter) spaced at a distance equivalent to the column size (457 mm). The loading protocol consisted of cycles with increasing maximum lateral displacement under constant axial load. It was found that the behavior of the two columns at drift demands higher than the drift at axial failure was significantly different. The lateral stiffness and the residual axial load capacity of the columns were found to be related to the axial load prior to axial failure.

000010906 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010906 653__ $$aColumn, reinforced concrete, collapse, shear, axial failure 

000010906 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010906 720__ $$aMatamoros, Adolfo B$$iMatchulat, Lisa M.$$iWoods, Charles
000010906 8560_ $$ffischerc@itam.cas.cz
000010906 8564_ $$s403381$$uhttps://invenio.itam.cas.cz/record/10906/files/S15-037.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S15-037.
000010906 962__ $$r9324
000010906 980__ $$aPAPER