000009808 001__ 9808
000009808 005__ 20141205153156.0
000009808 04107 $$aeng
000009808 046__ $$k2008-10-12
000009808 100__ $$aDall'Asta, Andrea
000009808 24500 $$aA Design Method for Steel Frames Equipped with Buckling Restrained Braces

000009808 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009808 260__ $$b
000009808 506__ $$arestricted
000009808 520__ $$2eng$$aIn this paper a design method for buckling-restrained braced steel frames is examined. The proposed method aims to obtain an uniform yielding of all Buckling Restrained Braces (BRBs), thus avoiding concentration of plastic deformation at some storey level. This is a critical point in the design since BRBs usually have very low hardening in post-elastic response, especially if they are used in steel frames with pinned joints. An optimal distribution of column stiffness and of brace stiffness can be preliminarily defined from the free vibration equations of an equivalent shear-deformable cantilever. This continuum model permits to obtain closed form solutions that can be adopted for the design of structures with regular mass distribution over the height. A similar procedure is directly applied to discrete models. An optimal solution for the equivalent SDOF system is achieved by using force-based or displacement based design approaches. Being the proposed method based on the first vibration mode, dynamic analysis are performed and discussed in order to evaluate the reduction of performance in the nonlinear range deriving from higher vibration modes.

000009808 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009808 653__ $$aBuckling restrained braces, braced steel frames, design method.

000009808 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009808 720__ $$aDall'Asta, Andrea$$iRagni, Laura$$iZona, A.
000009808 8560_ $$ffischerc@itam.cas.cz
000009808 8564_ $$s299610$$uhttps://invenio.itam.cas.cz/record/9808/files/S14-016.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S14-016.
000009808 962__ $$r9324
000009808 980__ $$aPAPER