Desenvolvimento de uma planilha computacional para o dimensionamento e detalhamento de escadas helicoidais em concreto armado

Abstract

This work aimed to prepare a computational spreadsheet – written in Microsoft Office Excel software – to assist in the dimensioning, detailing and design of a helical stair in reinforced concrete. For this, during the work, it is explained the motivations to this case. Initially, general notions of the architectural elements that makes a circular staircase were introduced, such as steps, unevenness, railings, parapets, angle, among others. Subsequently, the study of the forces (oblique bending and shearing) to which the structure will be submitted are calculated, and, in sequence, the themes referring to the determination of the reinforcement used in the main beam of the staircase. As a last theoretical approach, her are qualified as a recommendation for detailing the helical ladder. After exposing the theoretical framework, the computational spreadsheet is presented to assist in the dimensioning, detailing and design of a helical ladder in reinforced concrete. For this purpose, bulletins are accepted as masses of work, their functions and configurations. In the last folder, a code is presented, here the user has a possibility to extract a usable script in CAD programs (in this work, Autodesk AutoCAD was used). After, there is the presentation of comments regarding the possible portability of the spreadsheet to a more sophisticated language and, finally, the final definitions are presented as limitations and possible future improvements for the spreadsheet.