000020231 001__ 20231
000020231 005__ 20170118182401.0
000020231 04107 $$aeng
000020231 046__ $$k2017-01-09
000020231 100__ $$aShi, Zhongqi
000020231 24500 $$aNonsmooth Seismic Response Analysis of a Straight Bridge With Deck Rotation Induced By Abutment Impact

000020231 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020231 260__ $$b
000020231 506__ $$arestricted
000020231 520__ $$2eng$$aThe deck-abutment contact (e.g. pounding) during earthquake shaking often triggers the rotation of the deck. Contact at the deck level might alter dramatically the effective mechanical system activating unforeseen, in the design stage, behavior. This discrepancy between the assumed during design seismic behavior, and the actual seismic behavior governed by the nonsmooth planar deck dynamics, can be detrimental leading even to deck unseating/collapse. The impact-induced rotation mechanism is usually encountered in skew bridges, but it is observed also in straight bridges. As a reference, the 2013 experimental shake-table study of a four-span straight bridge by Saiidi et al. [1] showed unexpected large in-plane rotations. This resulted in significant residual displacement of the bents. The present paper simulates the response of that benchmark straight bridge in an attempt to capture the deck-abutment impact and the subsequent in-plane rotation. The study brings forward the (friction-based) physical mechanism behind the rotation of straight bridges which is usually ignored during design and analysis. In this context, it extends a previously established nonsmooth rigid body approach to account for the different excitations at the bottom of the bents and the abutments. The results shed light the role of friction on the impactinduced rotation mechanism, and underline the importance of devising practice-oriented procedures for considering during seismic design the potential in-plane deck rotation of even straight bridges. Finally, the study also investigates the sensitivity of the rotation with respect to the coefficient of friction value.

000020231 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020231 653__ $$anonsmooth dynamics, deck-abutment impact, deck rotation, concrete bridge, seismic response, pounding

000020231 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020231 720__ $$aShi, Zhongqi$$iDimitrakopoulos, Elias
000020231 8560_ $$ffischerc@itam.cas.cz
000020231 8564_ $$s1159714$$uhttps://invenio.itam.cas.cz/record/20231/files/796.pdf$$yOriginal version of the author's contribution as presented on USB, paper 796.
000020231 962__ $$r16048
000020231 980__ $$aPAPER