Cost structure of materials in ribbed slabs with variable section height
Abstract
Cost structure of materials in ribbed slabs with variable section height
Incoming article date: 05.02.2022A new approach to the optimization of ribbed reinforced concrete slabs of variable height with prestressing reinforcement is proposed. The approach is based on the design situation, due to the requirements of the strength of normal and inclined sections with full compliance with the design and design requirements, taking into account the strength and cost indicators of the materials used. The paper studies the optimization of elements that operate in the range without the need to install the calculated compression reinforcement. The study was carried out on the basis of taking into account the regularities of the resistance of reinforced concrete and the main provisions of the regulatory documents governing design and development activities in the Russian Federation, as well as relevant works of domestic and foreign scientists relevant to research in this area. The research method used is a structural-analytical analysis using the correlation dependences of the studied factors. Analytical dependences and graphic materials are presented that establish the optimal parameters of the element at the minimum cost of materials in order to use them in design practice. Recommendations for design are given, providing a structure of minimal cost and meeting the requirements of strength and durability. The results of the work indicate that measures to reduce the cost of the slab should be aimed primarily at reducing the cost of prestressing reinforcement. The conducted studies provide an opportunity at the design stage to determine the directions for reducing the cost of the product and justify the choice by rationally assigning the height of the slab, as well as the variable use of concrete and reinforcement of various classes.
Keywords: reinforcement, normal section, inclined section, optimization, prestressing, strength, ribbed plate, cost