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POSSIBLE SOLUTIONS BEFORE AND IMMEDIATELY AFTER EARTHQUAKE PROF. CLAUDIO MODENA MATERIALS The mechanical properties of stone masonry are derived from the table C8A.2.1 of the Circolare 2 febbraio 2009, n. 617 C.S.LL.PP. “Istruzioni per l’applicazione delle «Nuove norme tecniche per le costruzioni», which gives a range of values of the principal mechanical parameters of different kind of masonry. After a detailed critical survey of the masonry walls <strong>and</strong> in situ inspections of the building it was <strong>possible</strong> to identify two different masonry typologies MASONRY TYPOLOGY A Squared blocks stone masonry with good texture MASONRY TYPOLOGY B Irregular stone masonry with inner core MECHANICAL PROPERTIES OF MASONRY [TAB. C8A.2.1] ƒm [N∙cm -2 ] 0 [N∙cm -2 ] E [N∙mm -2 ] G [N∙mm -2 ] min max min max min max min max 260 380 5,6 7,4 1500 1980 500 660 21 ƒm [N∙cm -2 ] 0 [N∙cm -2 ] E [N∙mm -2 ] G [N∙mm -2 ] min max min max min max min max 200 300 3,5 5,1 1020 1440 340 480 20 w [kN∙ m -3 ] w [kN∙ m -3 ] MASONRY TYPOLOGY A MASONRY TYPOLOGY B MASONRY TYPOLOGY A MASONRY TYPOLOGY B GROUND FLOOR FIRST FLOOR POSSIBLE SOLUTIONS BEFORE AND IMMEDIATELY AFTER EARTHQUAKE
POSSIBLE SOLUTIONS BEFORE AND IMMEDIATELY AFTER EARTHQUAKE PROF. CLAUDIO MODENA DEFINITION OF THE SEISMIC ACTION PARAMETERS VALUES Ground Type A / Reference peak ground acceleration on type A ground a gR 0.132 g Soil Factor S 1.00 Periods defining the elastic response spectrum T B T C T D 0.15 s 0.4 s 2.0 s Importance Factor γ I 1.2 Behaviour Factor q 1.5 SA 0,45 0,40 0,35 0,30 0,25 0,20 0,15 Peak ground geographic coordinates 0,10 acceleration a gR longitude latitude 0,05 Jerusalem 0.132 35°12'E 31°47'N 0,00 SAel SAd 0 1 2 3 T(s) 4 POSSIBLE SOLUTIONS BEFORE AND IMMEDIATELY AFTER EARTHQUAKE
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Velocità sonica (m/s) Velocità so
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