عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Using a finite element numerical model, the amount of coverage bending moment into concrete linings of irrigation canals were examined; based on minimum bending anchored into the concrete panels, the optimum structural dimensions of a trapezoidal canal were extracted. This study showed that the optimal size depends on the side slope and to the depth of the canal such that for canal depths greater than 4 meters, the optimal ratio of the depth of the canal to the width of bed is between 1 to 1.5. For canals with a 1:1 side slope, this ratio is around 1.5 and it is reducing by decreasing the amount of side slope, as for a canal with side slope equal to 1:2, the optimum ratio of depth of canal to width of bed approaching to one. This study also showed that the increasing of soil elasticity modulus has essential role in reducing of the amount of the anchored bending moments of concrete lining. In addition, the amount of acting anchor on the concrete cover has a direct relation to the canal side slope.