000018257 001__ 18257
000018257 005__ 20170118182214.0
000018257 04107 $$aeng
000018257 046__ $$k2017-01-09
000018257 100__ $$aLu, Xilin
000018257 24500 $$aOptimization of Buckling Restrained Braced Frame Under Seismic Loading

000018257 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018257 260__ $$b
000018257 506__ $$arestricted
000018257 520__ $$2eng$$aThis study proposes a design procedure for the optimization of buckling restrained braced frames (BRBF) subjected to seismic loading. The stiffness distribution of the buckling restrained braces (BRBs) is optimized at the system-level. The parameters of a BRB component can be obtained according to the optimized stiffness. The seismic excitation is represented as a zero-mean filtered white noise and is formulated in the augmented state space with the BRBF structure. The hysteretic behavior of the BRB components are represented by the Bouc-Wen model and linearized to fit the state space formulation. The optimization objective is defined in terms of stationary structural responses. In the illustrative example, ductility and interstory drift are considered as the optimization objectives. The optimized results are compared with the common design practice according to the equivalent lateral force (ELF) procedure as specified by ASCE-7. The optimal BRBF design with minimized interstory drift response is similar to the design obtained by the ELF procedure, which, however, usually results in soft stories and nonuniform energy dissipation along the height. To uniformly distribute and minimize the ductility demand of the BRBF, the optimized design tends to distribute the stiffness inversely proportional with height and more stiffness is distributed at the first floor.

000018257 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018257 653__ $$aStructural optimization; buckling restrained braced frame; seismic response, stochastic loading

000018257 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018257 720__ $$aLu, Xilin$$iJr., Billie F. Spencer$$iFermandois-Cornejo, Gaston$$iXu, Jiaqi
000018257 8560_ $$ffischerc@itam.cas.cz
000018257 8564_ $$s382086$$uhttps://invenio.itam.cas.cz/record/18257/files/1117.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1117.
000018257 962__ $$r16048
000018257 980__ $$aPAPER