Béton armé (RC) Manuel de conception (AS 3600, EN 2, ACI 318)

Détails

Once the user has chosen the desired design code, Options de données supplémentaires Ce formulaire de données supplémentaires contient tous les paramètres à utiliser pour analyser une certaine “Détails” onglet comme le montre la figure ci-dessous. The units will be chosen automatically by program based on the chosen design code (Options de données supplémentaires Ce formulaire de données supplémentaires contient tous les paramètres à utiliser pour analyser une certaine 2 – Options de données supplémentaires Ce formulaire de données supplémentaires contient tous les paramètres à utiliser pour analyser une certaine 318 – Options de données supplémentaires Ce formulaire de données supplémentaires contient tous les paramètres à utiliser pour analyser une certaine).

Options de données supplémentaires Ce formulaire de données supplémentaires contient tous les paramètres à utiliser pour analyser une certaine, the user can fill the information for the project details, tel que

• Un nom de projet;
• Un identifiant de projet;
• Le nom de votre société;
• Le designer;
• Le client; et
• Toute autre note que vous souhaitez inclure

Ces informations seront insérées dans le rapport de conception généré.

Factors and Settings

In Analysis Settings, the user has to define the necessary number of iterations that will be considered by program during the searching of section compressed depth. This value of compressed depth will be used for calculation of the ultimate flexure for considered section. The analysis here is based on the following procedures:

• Assume the neutral axis depth, X (initial value d – efective depth)
• Calculate concrete compression force, steel tension and compression force
• Check equilibrium of force components
• The above procedure will be repeated while the sum of compression forces is not equal to tension forces

Aussi, the iterative procedure is used for the calculation of neutral axis depth in case of serviceability limit state, où la forme triangulaire du béton comprimé est utilisée. Généralement 40 les itérations suffisent. Ultimate flexure is calculated as M_ultime = F_c ∙ a_c + F_cs ∙ a_cs + F_s ∙ a_s. Des informations détaillées sur les calculs sont décrites dans le rapport de conception de sortie.

Lorsque l'utilisateur doit s'occuper de la conception des membres de la colonne, en cas d'action d'une force axiale avec flexion, le module de conception considère la courbe d'interaction N-M. To consider this curve internally program needs the necessary number of intermediate points. Typically there are three main points: tension axiale maximale, compression axiale maximale et condition équilibrée. Then intermediate points are considered from balanced condition to maximum tension and from balanced condition to maximum compression. Par défaut, le programme considère 40 points, bien que l'utilisateur ait la liberté de modifier ceci.

In the case of axial force with biaxial flexure the program considers 3D N-Mx-My interaction surfaces based on “Bresler Load Contour Method”. The program considers a set of M-N curves separately and then by the load contour method generates 3D surfaces. Detailed information about these calculations are described in output design report.

In the case of the AS 3600 code de conception, the reinforcement class must be selected. This will be reflected in the calculation of the strength reduction factor φ

In the case of the EN 2 code de conception, the Partial Safety Factors must be defined. These factors will be reflected in the calculation of ultimate strength forces.

For servicability limit state checks, like crack control, the long term effect in concrete should be considered. The user is able to define necessary Creep Parameters like the age of creep beginning and ending, Relative Humidity (EN 2 code) or Arid Environment (AS 3600 code).

Membrures

In the Standalone module, the user is able to define the desired number of members, which can be established with beam or column type. Pour chaque barre, la longueur libre doit être définie. If the member is a column type, une entrée supplémentaire est nécessaire pour la longueur efficace.

Dans le logiciel SkyCiv Beam, where only beam type members are considered, l'utilisateur doit entrer le coefficient de déflexion typique. Ce coefficient sera utilisé pour le calcul de la flèche de la poutre avec ouverture de fissure en section.

Shown below are some examples of typical deflection coefficients that represent different cases of beam flexure.

lancer le module de conception

For each member to be designed the section type, material properties and reinforcement, must be defined. For the section, the section type must be chosen and its dimensions defined. For the reinforcements, the longitudinal and shear reinforcement (étriers) must be defined. The user is able to arrange rebars at any longitudinal and transverse position inside the member. If shear reinforcement is not defined during the section design check, the program will consider shear capacity with only longitudinal reinforcement. dernièrement, the material strength properties for concrete and steel, as well as limited crack width, must be defined.

Once all the data is defined for the member, the user must process to save the configuration by clicking the “sauver” bouton. This is necessary for the RC layout to be applied, autrement, they will not be saved for design check.

Les forces

For the standalone version of this module, the forces are defined manually in tables. Below are two tables: one is for forces that will be considered for ultimate limit state checks and the other for serviceability limit state checks. The forces are defined for each section of the member and the number of sections along the member is not limited. Clicking on the “Add New Point” button allows the user to define the position (as a % of length along the member) and the set of forces acting on that location along the member.

In the SkyCiv Beam, the forces are defined automatically based on the beam analysis performed by the module. Dans le cas présent, the user may just define the desired number of sections to be designed and specify their positions along the member.

Encore une fois, once all the data is defined, l' “sauver” button must be clicked, otherwise they will not be saved for the design check.

Combinaisons

If the user wants to consider load combinations, he/she must define the load type for each load that is applied to the beam model.

In the Combinations tab, the user can define all the necessary load combinations for strength and serviceability checks. Par défaut, the program generates a set of standard load combinations based on the chosen design code. They can be edited and extended by the user. In particular load combination, a value not equal to zero must be inputted for a specific load type to be considered. Sur ce, the load type will not be considered in the combination at all.

Once the table is completed or has been properly filled by the user, it is necessary to save the work by clicking the “sauver” bouton.

Résultats

After completing all the necessary information for the design of the concrete member, the user can finally proceed with the design by clicking the “Vérifier la conception” bouton. In the Results tab, the user may view the design checks and capacity ratios. In the design module, il existe des ratios de capacité pour chaque contrôle séparé comme le contrôle de flexion, contrôle de la force de cisaillement, contrôle des fissures et etc.. Pour un examen plus approfondi du calcul de conception, clicking the report-icon at the end of the row will generate a detailed design report of the checks performed by the module. Le rapport comprend toutes les formules de contrôle avec tous les paramètres décrits et les calculs manuels détaillés par rapport à la conception de la section en béton armé.