000019212 001__ 19212
000019212 005__ 20170118182304.0
000019212 04107 $$aeng
000019212 046__ $$k2017-01-09
000019212 100__ $$aAlcocer, Sergio
000019212 24500 $$aStiffness Decay and Damping Ratios of Steel Fiber Reinforced Concrete Walls

000019212 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019212 260__ $$b
000019212 506__ $$arestricted
000019212 520__ $$2eng$$aThe stiffness degradation and damping ratio characteristics of low-rise steel fiber-reinforced concrete (SFRC) walls subjected to shake table excitations is presented in this paper. Three fiber volume contents (0.55, 0.75, and 1 %) and fibers with aspect ratios (length-to-diameter ratio) of 64 and 80 were used to fabricate six SFRC walls. The results of two conventionally reinforced concrete (RC) walls are included as a benchmark. Wall performance is presented in terms of observed failure modes, measured lateral drift components, fundamental frequencies, damping factors, and stiffness decay relationships. The data show that larger drift ratios can be achieved as the fiber content increased, irrespective of the fiber type, and that fibers with a higher aspect ratio led to a greater number, smaller crack widths. Stiffness reductions in the order of 50% were observed for the SFRC walls at relatively small lateral drifts (0.1 to 0.2%). Nonetheless, SFRC walls showed smaller stiffness reductions than the companion RC walls over the entire range of drifts. Measured damping ratios for the SFRC walls showed wide scatter, but ranged between 6% at low drifts and as high as 12% after diagonal cracking at larger drifts. The conventionally reinforced concrete walls showed similar values at low drifts, but somewhat less values (10%) at larger drifts.

000019212 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019212 653__ $$asteel fibers; reinforced concrete walls; stiffness degradation; damping, period of vibration.

000019212 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019212 720__ $$aAlcocer, Sergio$$iPincheira, José$$iCarrillo, Julian
000019212 8560_ $$ffischerc@itam.cas.cz
000019212 8564_ $$s513798$$uhttps://invenio.itam.cas.cz/record/19212/files/3098.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3098.
000019212 962__ $$r16048
000019212 980__ $$aPAPER