With the Shearwall Parameters command, the design parameters used in the design of concrete and group shearwalls are determined. Concrete cover, maximum and minimum reinforcement interval and percentage etc. parameters are determined from the Shearwall Parameters window.
Location of Shearwall Parameters Dialog
Ribbon menu Analysis and Design tab Design Parameters title under Shearwall parameters by clicking on the command Shearwall Parameters can be found in the dialogue.
It determines with parameters which criteria the program will comply with in concrete design and rebar placement stage.
It is the distance from the center of gravity of the rebar inside the shearwall to the outer face of the concrete.
Min. percentage (longitudinal/transverse)
It is the ratio that determines the minimum value of the longitudinal and transverse rebar to be placed on the wall. The product of the gross area of the wall with the minimum percentage parameter determines the minimum rebar area. The program selects the rebar to be placed on the shearwall, not less than this area.
It is the ratio that determines the maximum value of the longitudinal rebar to be placed on the wall. The product of the gross area of the wall by the parameter of maximum percentage determines the maximum rebar area. The program compares the rebar that needs to be placed on the wall with this area. If the area of rebar to be placed on the shearwall is too much, a warning is given that the section is insufficient for the wall exceeding the pursmail value.
Min. transverse reinforcement interval
In the program, the range of the stirrup to be placed on the shearwall is selected not less than the value specified in this parameter.
Max. transverse reinforcement interval
In the program, the interval (s) of the stirrup to be placed on the shearwall is selected not to be more than the value specified in this parameter.
Min. reinforcement interval
It determines the minimum spacing between two longitudinal rebars. The program reinforces the wall so that the spacing between two longitudinal rebars is not less than the value entered in this parameter.
Max. reinforcement interval
It determines the maximum spacing between two longitudinal rebars. The program reinforces the wall so that the interval between two longitudinal rebars is not more than the value entered in this parameter.
Min. head rebar ratio (upper stories)
It is the ratio of the total vertical rebar area to the gross wall section area in each of the wall end zones except the critical wall zone.
Min. head rebar ratio (critical stories)
In the critical wall area, it is the ratio of the total vertical rebar area in each of the wall end regions to the gross wall section area.
Min. head percentage
It is the minimum ratio of the rebar to be placed in the shearwall heading area.
Min. short shearwall percentage
It is the longitudinal rebar ratio of the walls marked as short walls.
Min. body percentage
This parameter is the minimum ratio of the rebar to be placed in the shear area.
Min. dimension ratio
In vertical bearing elements of shearwall object, one dimension of which is equal to or greater than the value written in this line, rebar design is made according to the conditions of the shearwall element. Otherwise, rebar design is made according to column element conditions.
Transverse body steels type
When drawing the transverse rebar in wall openings, it is selected which type will be used. Tick the option you want to use.
Inside header bending options
It is selected whether the shearwall horizontal rebars will be square or not at the shearwall ends.
Friction shear calculation
For the friction shear calculation, the shear - friction coefficient value is selected from the table given for different situations.
Monolithic concrete = 1.4
Roughened surface = 1.0
Unprocessed surface = 0.6
Use upper story element reinforcements as minimum on lower story
If the option is selected, if there is more rebar in the upper story than the lower story, the rebar of the walls in the lower story is taken as much as the upper story.
Use long head regions outside of critical section
If the option is selected, the end zone rebars and the length of the end zone calculated for the critical zone on the wall are continued throughout the entire story, also except the critical zone.
Calculate required reinforcement using fiber model
If marked, the required longitudinal reinforcement area in reinforced concrete shearwall is calculated by defining appropriate concrete and reinforcement models and section fiber in the shearwall cross section.
Use shear strength contribution of neighbour shearwall boundary areas
If marked, the shear strength contribution of adjacent headings in the walls is taken into account.