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CONCRETE TECHNOLOGYwww.cpi-worldwide.com CPI %u2013 Concrete Plant International %u2013 1 | 2026 49At the point of localization, the mean crack width across all specimens is significantly lower than at the maximum load. This highlights the progressive increase in crack width of the dominant crack within the transition region. Strain distribution and mean curvatureTo determine the strain distribution and the mean curvature, the region between the load application points (see Fig. 6) is subdivided. The edge strains are derived from the measured strain fields, and the normalized compression zone height %u03be is defined.If the measurement points lie approximately on the line y = ax + b (R %u2248 %u00b11), the mean cross-sectional curvature %u03ba can be calculated according to Equations (2) and (3), and the normalized compression zone height %u03be according to Eq. (4).Table 2: Crack widths, crack spacing V1. Table 3: Crack widths, crack spacing V2.((Tab. 2)) ((Tab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ab. 3)) +01-./56--7!\\\\\;01-./5 (+ #) (+ ($ %& #% $ $C9-./0)=>-./56--7 #*\%(\-?@0)=>-./56--7 (\(\) :=>5-./ 6--7 $\$\!\!# !$ !% !& '( ) *+,-./0123456--7 !\:1234 6--7 !\+,0123456--7 !\;012345 '+ #$\'& %) + #) %# %89-./0)<=23456--7 +\-?@0)<=23456--7 %\) :<=5234 6--7 '\-./01-./56--7 !\!\%\:1-./ 6--7 !\+01-./56--7 !\!\!\;01-./5 (% #! '& '# %+ '! + $B9-./0)<=-./56--7 +\-?@0)<=-./56--7 %\% %\) :<=5-./ 6--7 '\* )\Fig. 6: Positions of the measurement points for determining the strain distribution and curvature.