FEATURES OF CALCULATION OF THE STRENGTH OF NORMAL SECTIONS OF REINFORCED CONCRETE BENT ELEMENTS WITH AREAS OF RELATIVE RESISTANCE

Abstract

Discusses the features of the solution of some problems of calculating the strength of normal section of bendable reinforced concrete elements of rectangular section with single and double non-stressed reinforcement using the relative areas of resistance. Shows the impact on the reinforcement elements of concrete strength and geometric dimensions of the cross section. The proposed relations for determination of the min-imum concrete strength, minimum cross-section dimensions, the minimum single or double bending rein-forcement concrete elements depending on the external influence and position of the reinforcement along the height of the section. We consider the calculation of reinforced concrete elements with mixed reinforcement of stretched zone reinforcement of different classes, which are often found in the strengthening of reinforced concrete structures. The obtained dependences allow to solve problems of direct and inverse design of the normal section of bendable reinforced concrete elements with single and double reinforcement, getting economical solutions.