PSI - Issue 72

Denys Mykhailovskyi et al. / Procedia Structural Integrity 72 (2025) 315–322

319

t u

u

t    2

wt 2 ,

w t ( ) ,

M b y wt ,

f

u du

.

(6)

wt ,

u

t

0

Fig.4 shows the stressed deformed state for a reinforced wooden beam and the action of internal and external forces as well as the distribution of internal stresses in wood.

Fig. 4 Stages of the stress-deformed state of a passively reinforced bending wooden element with metal materials

The equation includes internal forces existing in wood and reinforcing materials

             0, 0; , , , , , , , , t сs s c i wc wt t сs s c wt wc M M M M M N N N N

(7)

Equation for determining internal forces in metal reinforcing material and carbon tape: - internal forces in metal reinforcement:   с s c s c s s c N A f u , , , , 

(8)

  s c с s c s c s s c M A f u y , , , , , 

(9)

-

internal forces in carbon tape:   t сs t сs t сs t сs N A f u , , , , 

(10)

  t сs t сs t сs t сs u y , , , ,

t сs M A f , 

(11)