000021990 001__ 21990
000021990 005__ 20170622131316.0
000021990 04107 $$aeng
000021990 046__ $$k2017-06-15
000021990 100__ $$aSilva, Luís C.
000021990 24500 $$aA DISCRETE MACRO-MODEL USING HOMOGENIZATION WITH STRAIN-RATE DEPENDENCY FOR THE OUT-OF-PLANE STUDY OF MASONRY PANELS SUBJECTED TO IMPACT LOADING

000021990 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021990 260__ $$bNational Technical University of Athens, 2017
000021990 506__ $$arestricted
000021990 520__ $$2eng$$aIn recent decades, a great deal of effort has been made to develop solutions to reduce destructive damage and casualties due to blast loads and impacts, also in light of a major protection of the built heritage against terrorist attacks. In the present study, a simple and reliable Homogenization approach coupled with a Rigid Body and Spring Model (HRBSM) accounting for high strain rate effects is utilized to analyse masonry panels subjected to impact load. The homogenization approach adopted relies into a coarse FE discretization where bricks are meshed with a few elastic constant stress triangular elements and joints are reduced to interfaces with elastic-plastic softening behaviour including friction, a tension cut-off and a cap in compression. Strain rate effects are accounted for assuming the most meaningful mechanical properties in the unit cell variable through the so-called Dynamic Increase Factors (DIFs), with values from literature data. The HRBS model, which has been implemented at structural level in the commercial code ABAQUS resorts on a discretization into rigid quadrilateral elements with homogenized bending/torque non-linear springs on adjoining edges. The model is tested on a masonry parapet subjected to a standardized impact. A number of previous results obtained by literature models are available for comparison, as well as experimental data. Satisfactory agreement is found between the present results and existing literature in the field, both experimental and numerical.

000021990 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021990 653__ $$aMasonry, out-of-plane, homogenization, blast and impact load, DEM.

000021990 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021990 720__ $$aSilva, Luís C.$$iMilani, Gabriele$$iLourenço, Paulo B.
000021990 8560_ $$ffischerc@itam.cas.cz
000021990 8564_ $$s807263$$uhttps://invenio.itam.cas.cz/record/21990/files/18576.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS27] Advanced numerical methods for historical masonry monuments preservation in seismic zone
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000021990 962__ $$r21500
000021990 980__ $$aPAPER