Punching shear verification is a program that checks the Failure Limit State of concrete for punching shear in flat and waffle slabs exposed to concentrated loads from rectangular or circular supports.
The program can check slabs with or without transverse punching shear reinforcement, takes into account the presence of openings or lightweight zones in the slab, and the position of the supports (internal, edge or corner).
The concrete codes implemented in Punching shear verification are the following:
More concrete codes will be implemented in upcoming versions.
CYPECAD checks the Failure Limit State of concrete for punching shear using two methods: Point tangential stress check and Check in accordance with the design standards. The latter method is that used by the 'Punching shear verification' program.
Punching shear verification is located in the Structural elements group of the main CYPE program menu. Once selected, the data introduction process for a new job (File > New) is carried out in two phases:
The general data of a new job is introduced with help from an assistant which is executed automatically once a new job is created (File > New), and the name and description of the job have been provided.
The assistant asks for the following data:
Once the data introduction using the assistant has concluded, the same data can be edited using the options within the General data menu (Materials, Combinations and Loadcases) or using the corresponding icons from the toolbar: (Materials), (Combinations) and (Loadcases).
To introduce a support, users must select List of supports from the General data menu or press the button from the toolbar. The List of supports dialogue box will appear where users can create, duplicate or delete supports, as well as select the created support which is to be viewed on screen. When a support is created, users define its section type, its dimensions and the location of the supports which are to be introduced in the job.
Users will only view the selected column on-screen. Using the button of the toolbar, users can view the other supports that have already been defined.
To edit the data of a support which has already been introduced, use the Support option from the General data menu or the button from the toolbar.
In both cases, users must indicate the reinforcement provided in a specific width, which depends on the selected code.
Once the data has been introduced, the viewed support can be checked on-screen using the Check option in the General data menu or the button from the toolbar.
The program carries out the punching shear check using the following steps:
Using the Check option in the General data menu or the button from the toolbar, the following results can viewed on-screen or in a report:
Displayed with these perimeters is their centre of gravity with its corresponding colour.
The reports display all the checks carried out on the geometric and resistance specifications, and that the reinforcement distribution is in accordance with the selected code.
When the Check option in the General data menu or the button from the toolbar is selected, the program asks "Would you like to view the complete report of the assessed checks?". If the answer is yes, the report will be displayed on-screen and can be printed or exported to various formats. Only the report of the support currently viewed on-screen will be exported or printed.
To obtain the verification reports of all the supports of the job in a single document, the Job report option must be selected (File > Print).
Using the Job drawing option (File > Print), users can configure and generate drawings of all the supports of the job. These drawings display the details of the selected reinforcement and its take-off.