000019805 001__ 19805
000019805 005__ 20170118182337.0
000019805 04107 $$aeng
000019805 046__ $$k2017-01-09
000019805 100__ $$aGray, Michael
000019805 24500 $$aSeismic Response of Hybrid Ductile-Rocking Buckling Restrained Braced Frames With Cast Steel Supplemental Energy Dissipation Elements

000019805 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019805 260__ $$b
000019805 506__ $$arestricted
000019805 520__ $$2eng$$aThis paper presents numerical results on the seismic response of the design of a hybrid ductile-rocking (HDR) seismic force-resisting system. The HDR system consists of a code-designed buckling-restrained braced (BRB) frame with specially designed column-foundation connections that permit limited base rocking. The intent of the system is to economically improve the performance of BRB frames by reducing large concentrations of drift and damage at a few stories and reducing excessive residual deformations. The HDR system maintains the highly desirable limit on forces and accelerations that are typical of the response of BRB frames, in contrast to controlled rocking (CR) structures, where frame members are designed to remain elastic but can be overloaded by higher mode demands. This paper outlines the basic mechanics of the proposed HDR system and then presents an example design of a 6-storey BRB frame located in Los Angeles. The system is detailed with a column-foundation connection that includes a lockup device that ensures that the codified lateral resistance of the BRB frame can be achieved after the system locks up at a predetermined base rotation. Supplemental energy dissipation elements comprised of ductile cast steel yielding connectors are also included at the base of the structure to provide hysteretic damping to the rocking system. Results indicate that a significant reduction in drift concentrations, residual deformations, and cyclic damage can be achieved with the HDR system when compared to conventional BRB frames, while still controlling storey shear forces and accelerations as effectively as conventional BRB frames with a fixed base. This suggests that the HDR system offers an economical method for enhancing the performance of BRB frame structures.

000019805 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019805 653__ $$abuckling-restrained brace; rocking; residual; damage concentration; cast steel

000019805 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019805 720__ $$aGray, Michael$$iChristopoulos, Constantin$$iBinder, Justin
000019805 8560_ $$ffischerc@itam.cas.cz
000019805 8564_ $$s1097916$$uhttps://invenio.itam.cas.cz/record/19805/files/4450.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4450.
000019805 962__ $$r16048
000019805 980__ $$aPAPER