000021951 001__ 21951
000021951 005__ 20170622131313.0
000021951 04107 $$aeng
000021951 046__ $$k2017-06-15
000021951 100__ $$aOcchipinti, Giuseppe
000021951 24500 $$aREALISTIC 3D NONLINEAR DYNAMIC ANALYSIS OF EXISTING AND RETROFITTED MULTI-STOREY RC BUILDINGS SUBJECT TO EARTHQUAKE LOADING

000021951 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021951 260__ $$bNational Technical University of Athens, 2017
000021951 506__ $$arestricted
000021951 520__ $$2eng$$aThis paper presents a high fidelity numerical model developed to investigate the seismic performance of an original and retrofitted 10-storey reinforced concrete (RC) framed building. The analysed structure represents a typical existing building in Catania, Italy, which was designed according to old standards to resist gravity and wind loading but not earthquakes. The proposed numerical description adopts beam-column elements for beams and columns and special purpose shell elements for modelling RC floor slabs, both allowing for geometric and material nonlinearity. In order to model the influence of masonry infill, a novel macro-element is developed within a FE framework based on a discrete formulation. 3D nonlinear dynamic simulations are performed considering sets of natural accelerograms acting simultaneously along the two horizontal and the vertical directions and compatible with the design spectrum for the Near Collapse Limit State (NCLS). To improve computational efficiency, which is critical when investigating the nonlinear dynamic behaviour of large structures, the partitioning approach previously developed at Imperial College is adopted, enabling effective parallelisation on HPC systems. The numerical results obtained from the 3D nonlinear dynamic simulations are presented and discussed, focusing on the variation in time of the deformed shape, inter-storey drifts, plastic deformations and internal force distribution, considering or neglecting the infill panel contribution. The original structure showed a very poor seismic performance, where the consideration of the infill panel contribution leads to significant variation in the response. An effective strengthening solution utilising eccentric steel bracings with dissipative shear links is also illustrated and employed to retrofit the original structure. A detailed model of the retrofitting components is also proposed and implemented within the detailed model for the original building. The results of numerical simulations for the retrofitted structure confirm that the proposed solution significantly enhances the response under earthquake loading, allowing the structure to resist the design earthquake with only limited damage in the original RC beams and columns, highlighting the feasibility of retrofitting for this typical multi-storey RC building structure.

000021951 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021951 653__ $$a3D nonlinear dynamic analysis, seismic assessment of RC building, retrofitting strategies, eccentric steel bracings

000021951 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021951 720__ $$aOcchipinti, Giuseppe$$iMacorini, Lorenzo$$iCalio', Ivo$$iIzzuddin, Bassam
000021951 8560_ $$ffischerc@itam.cas.cz
000021951 8564_ $$s2454074$$uhttps://invenio.itam.cas.cz/record/21951/files/18445.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS18] Modeling the Nonlinear Behavior of Structures
.
000021951 962__ $$r21500
000021951 980__ $$aPAPER