Specifics of Assessing the Strength and Crack Resistance of Prestressed Elements Without Transverse Reinforcement Along Inclined Sections

Abstract

A practical method for assessing the strength and moment of crack formation of prestressed bending elements without transverse reinforcement along inclined sections is substantiated in relation to improved standard racks for power transmission line supports with a voltage of 0.4-10 kV. The racks in question are produced using bench-type formless molding technology, which provides for their reinforcement only with longitudinal prestressed wire. The consumption of reinforcing steel for improved racks is 2.3 times less than for standard racks. A special feature of the proposed racks is operation without the formation of normal and inclined cracks. The standard calculation methodology represents the concept of calculating strength and crack resistance, which assumes the formation of cracks in bending elements - for the feasibility of calculations for crack opening and taking them into account when calculating the deformability of the element. The proposed method for assessing the strength and crack resistance of prestressed elements without transverse reinforcement along inclined sections, based on a normative representation, has a safe level of strength along inclined sections and the necessary potential for concrete resistance to the formation of inclined cracks.