000011650 001__ 11650
000011650 005__ 20141205155932.0
000011650 04107 $$aeng
000011650 046__ $$k2008-10-12
000011650 100__ $$aShing, P. Benson
000011650 24500 $$aTorsional Capacities of Cap Beams in Elevated Transportation Structures

000011650 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011650 260__ $$b
000011650 506__ $$arestricted
000011650 520__ $$2eng$$aThis paper investigates the torsional load capacities of two reinforced concrete cap beams in the elevated guideway structures. One beam has a regular configuration and the other has an irregular configuration. For each beam type, a 1/2-scale model was tested. The failure mechanisms of both beams were dominated by torsion. The load capacity of the regular beam was governed by the yielding of the main longitudinal reinforcement induced by a truss action. The capacity of the irregular beam was governed by a torsional crack through the columns zone, which can be attributed to the lack of confinement in the region. The large spacing of the top horizontal ties in the regular beam led to vertical splitting cracks when the beam was loaded through the shear keys. Nonlinear finite element analyses have been conducted on the beams. The finite element models are able to reproduce the nonlinear behaviors observed in the tests with reasonably good accuracy. Based on the experimental observations and numerical results, strut-&-tie models have been developed to evaluate the load capacities of the beams. Both types of models have indicated that the horizontal load resistance of a cap beam under bending and torsion will decrease with the decrease of the vertical load.

000011650 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011650 653__ $$aBent caps, reinforced concrete beams, finite element method, strut-&-tie model, torsion, earthquake performance

000011650 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011650 720__ $$aShing, P. Benson$$iKwon, Minho$$iMallare, Chip$$iRestrepo, Jose
000011650 8560_ $$ffischerc@itam.cas.cz
000011650 8564_ $$s307542$$uhttps://invenio.itam.cas.cz/record/11650/files/05-02-0141.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0141.
000011650 962__ $$r9324
000011650 980__ $$aPAPER