000018642 001__ 18642
000018642 005__ 20170118182233.0
000018642 04107 $$aeng
000018642 046__ $$k2017-01-09
000018642 100__ $$aKuang, J.S.
000018642 24500 $$aInfluence of Axial Compression Ratio on Drift Capacity of RC Columns

000018642 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018642 260__ $$b
000018642 506__ $$arestricted
000018642 520__ $$2eng$$aRC columns in modern buildings are often subject to high compression force, which can lead to premature compression failure and reinforcement buckling. To ensure adequate drift capacity can be achieved, several design codes limit the allowed axial force to strength ratio (AFR) specific to a ductility class. Nevertheless, there is no consensus on what are the suitable limits to use in preventing the undesirable failures of the vertical members. Some design codes even do not limit the AFR in design. To resolve this issue, this paper presents a scientific revisit on the AFR effect on RC columns, which is conjugated with a comprehensive statistical analysis of 474 sets of experimental data. It was found that the drift capacity of the columns decreases with increasing AFR. In particular after AFR > 40, increasing amount of confining reinforcement is no longer as effective in enhancing the drift capacity as it is in the low AFR level. Yet, the lateral strength increase with increasing AFR. To guarantee desirable seismic performances of RC columns, the AFR should be limited in the design. The results also suggest that different AFR limits may be used for slender and short RC columns due to different failure mechanisms.

000018642 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018642 653__ $$aaxial force ratio; shear column; drift capacity; lateral strength; design codes

000018642 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018642 720__ $$aKuang, J.S.$$iYuen, Y.P.$$iKobya, V.
000018642 8560_ $$ffischerc@itam.cas.cz
000018642 8564_ $$s1319962$$uhttps://invenio.itam.cas.cz/record/18642/files/19.pdf$$yOriginal version of the author's contribution as presented on USB, paper 19.
000018642 962__ $$r16048
000018642 980__ $$aPAPER