000011062 001__ 11062
000011062 005__ 20141205155832.0
000011062 04107 $$aeng
000011062 046__ $$k2008-10-12
000011062 100__ $$aMortezaei, A.
000011062 24500 $$aInfluence of External Steel Plates on the Characteristics of Existing RC Columns under Near Field Ground Motion

000011062 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011062 260__ $$b
000011062 506__ $$arestricted
000011062 520__ $$2eng$$aNear field ground motions are different from ordinary ground motions in that they often contain strong coherent dynamic long period pulses and permanent ground displacements. The dynamic motions are dominated by a large long period pulse of motion that occurs on the horizontal component perpendicular to the strike of the fault, caused by rupture directivity effects. Near fault recordings from recent earthquakes indicate that this pulse is a narrow band pulse. These characteristics make near field earthquakes unique compared to far field ground motions, which nearly all seismic design criteria are based on. Older buildings built before 1987 in Iran are known to demonstrate poor seismic performance in terms of ductility and energy dissipation capacity during severe seismic events. Various methods are developed for strengthening of reinforced concrete columns against shear. Strengthening of reinforced concrete columns using external bounding of steel plates was one of the popular research areas of recent years. This paper presents the effect of near field motions on reinforced concrete columns strengthen by external bonding of steel plates. Five reinforced concrete columns were analyzed under seismic loading. Three main types of steel members with different arrangements were bonded to the column. The purpose was to obtain ductile behavior for shear deficient reinforced concrete columns. The analysis result confirmed that all steel plate arrangements improved the strength and stiffness of the specimens significantly. The tension reinforcement of all strengthened reinforced concrete specimens was yielded. The failure modes and ductility of specimens were proved to differ according to the type of the steel member and arrangement along the column.

000011062 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011062 653__ $$anear field, directivity effects, reinforced concrete column, strengthening, steel plate.

000011062 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011062 720__ $$aMortezaei, A.$$iKheyroddin, A.$$iGhodrati Amiri, G.
000011062 8560_ $$ffischerc@itam.cas.cz
000011062 8564_ $$s1170736$$uhttps://invenio.itam.cas.cz/record/11062/files/05-03-0019.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-03-0019.
000011062 962__ $$r9324
000011062 980__ $$aPAPER