Issue 70

H. A. Mohamed et alii, Frattura ed Integrità Strutturale, 70 (2024) 286-309; DOI: 10.3221/IGF-ESIS.70.17

Partial fracture

Splitting

High crushing and significant steel buckling

High grade of crushing

Steel buckling

Figure 9: Modes of failure of columns with 15% CR.

Ductility The capability of a structure's part to tolerate internal forces with high deformation is known as its ductility, and calculating the ductility value can provide a clear picture of the capacity for plastic deformation regarding column specimens. The proportion of the Δ u of the RC columns to the Δ y is defined as the ductility index (DI). Fig. 10 illustrates the ductility index decrease for each studied rubberized reinforced concrete column specimen, and Table 3 displays their data. The ductility index decreased as the CR ratio raised from 0% to 10%. Additionally, the ductility index was marginally lowered by an increase in the CR ratio from 10% to 15%. The decreasing was very significant in the instance of the rubberized reinforced concrete specimen with 15% of crumb rubber (R15%H1.8C), and medium in case of the specimen with 10% of crumb rubber (R10%H1.8C). The ductility index for the rubberized reinforced concrete specimens R15%H1.8C and R10%H1.8C

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