000020087 001__ 20087
000020087 005__ 20170118182354.0
000020087 04107 $$aeng
000020087 046__ $$k2017-01-09
000020087 100__ $$aMacrae, Gregory
000020087 24500 $$aStraightening of Low-Damage Steel Buildings With Residual Displacements

000020087 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020087 260__ $$b
000020087 506__ $$arestricted
000020087 520__ $$2eng$$a The residual interstory drift ratio (RISDR) of a three story 2-D steel frame building structure is studied under the same ground motions records applied twice. The records were chosen such that during the first shake the residual drift was close to 1%. Before the second shake the building is fitted with tension-only braces to encourage dynamic re-straightening. The tension-only braces are steel rods which yield in tension and carry no force in compression. It is shown that increasing the story strength of the structure by adding tension-only braces can straighten the structure. However, over-straightening may also occur causing significant residual drifts in the opposite direction. Increasing brace stiffness while maintaining the same strength causes the residual interstory drift ratio (RISDR) of the structure to first decrease and then increase slightly. At high brace stiffnesses the RISDR becomes almost constant and independent of stiffness. For the particular case studied, the optimal increase of story strength and stiffness was 35% and 10% respectively for the shaking considered. With the addition of a brace with these characteristics, instead of the second shake approximately doubling the residual displacement, it reduces by about 100%, effectively straightening the structure.

000020087 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020087 653__ $$aEffect of subsequent shakes; Dynamically re-straightening; Tension braces; Story strength and stiffness increase

000020087 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020087 720__ $$aMacrae, Gregory$$iRad, Ali Abdolahi
000020087 8560_ $$ffischerc@itam.cas.cz
000020087 8564_ $$s1071109$$uhttps://invenio.itam.cas.cz/record/20087/files/529.pdf$$yOriginal version of the author's contribution as presented on USB, paper 529.
000020087 962__ $$r16048
000020087 980__ $$aPAPER