000021766 001__ 21766
000021766 005__ 20170622131303.0
000021766 04107 $$aeng
000021766 046__ $$k2017-06-15
000021766 100__ $$aGeorgiev, Tzvetan
000021766 24500 $$aPERFORMANCE ASSESSMENT OF CONCENTRICALLY BRACED FRAMES WITH MODIFIED BRACES DEPENDING ON THE APPLIED BEAM-COLUMN JOINTS

000021766 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021766 260__ $$bNational Technical University of Athens, 2017
000021766 506__ $$arestricted
000021766 520__ $$2eng$$aConcentrically braced frames with crossed diagonals (X-CBFs) are a popular and traditional system in seismic resistant design. Their energy dissipation capacity is primarily provided by yielding of braces in tension and buckling in compression. An improved CBF configuration by introducing bracings with modified sections, resulting in low cycle fatigue endurance and enhanced ductility of the critical member, has been developed during an experimental and numerical research program. Apart from improved dissipative behaviour, proper structural seismic performance implies control over residual drifts and self-centering features of the seismic resistant systems. In that direction proper collaboration between the braces in CBF and contour frame has to be established and improvement of structural performance might be achieved by the engineer at a very affordable level. The beam-to-column joints and the column bases in the contour frame in CBF’s could be designed as rigid, semirigid or pinned. The connection behaviour has a major influence on the residual drifts of the system. That effect was investigated in series of braced frames with different types of joints. Numerical simulation by nonlinear time history analysis and a detailed comparison is presented. Recommendations for the joints stiffness in CBF with modified braces and assessment of their seismic performance are presented. Different techniques for modelling of the braces as Multi-linear Plastic Link with Pivot hysteresis type and three-hinge model are compared.

000021766 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021766 653__ $$aImproved seismic performance, CBF, Innovative systems, Non-linear analysis, Residual drifts.

000021766 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021766 720__ $$aGeorgiev, Tzvetan$$iRaycheva, Lora$$iZhelev, Dimo
000021766 8560_ $$ffischerc@itam.cas.cz
000021766 8564_ $$s974352$$uhttps://invenio.itam.cas.cz/record/21766/files/17857.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS09] WORKSHOP OF THE INNOSEIS PROJECT- Innovative anti-seismic devices for buildings
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000021766 962__ $$r21500
000021766 980__ $$aPAPER