000018836 001__ 18836
000018836 005__ 20170118182243.0
000018836 04107 $$aeng
000018836 046__ $$k2017-01-09
000018836 100__ $$aHassan, Wael
000018836 24500 $$aSeismic Performance of Shear Controlled Src Composite Columns

000018836 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018836 260__ $$b
000018836 506__ $$arestricted
000018836 520__ $$2eng$$aThis paper addresses experimentally the cyclic performance of older steel reinforced concrete (SRC) composite columns that resemble existing buildings and bridges of pre 1980s construction; prior to enforcing seismic details. Two test specimens representing exterior columns modeled based on a typical seismic design of a 20-story prototype gravity existing building are constructed and tested under quasi-static lateral displacement cyclic loading and high axial compression loads. The tested columns include non-seismic widely spaced hoops with 90 degree hooks; thus the columns are considered shear and confinement deficient. Test parameters include target failure mode and axial load ratio. The tests aim to quantify existing SRC columns seismic shear strength and deformability along with a preliminary attempt to establish backbone curve recommendations. The results show relatively early shear failure of the tested columns that can jeopardize the structural safety of an existing building under moderate to strong seismic shaking. The high axial loads seem to compromise the deformation capacity of the SRC columns and result in limited ductility and significant post-peak strength degradation. Based on the observed test results, retrofitting SRC shear controlled columns with high axial loads seems inevitable in areas of strong seismicity.

000018836 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018836 653__ $$aSRC columns; shear; seismic assessment; existing buildings; non-ductile concrete.

000018836 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018836 720__ $$aHassan, Wael$$iFarag, Mayer
000018836 8560_ $$ffischerc@itam.cas.cz
000018836 8564_ $$s1204154$$uhttps://invenio.itam.cas.cz/record/18836/files/2326.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2326.
000018836 962__ $$r16048
000018836 980__ $$aPAPER