Wall Design

Using the results obtained from the analysis of the entire structure and additional design data, automatically design concrete wall members according to the following design codes: American Concrete Institute (ACI318-89, ACI318-95, ACI318-99, ACI318-02 & ACI318-05), Canadian Standards Association(CSA-A23.3-94), British Standard (BS8110-97) and European Standard (ENV 1992-1-1:1992 & EN 1992-1-1:2004).

Architectural Institute of Japan (AIJ-WSD99), Architectural Institute of Korea (AIK-USD94), Korean Society of Civil Engineers (KSCE-USD96), Korean Concrete Institute ((KCI-USD03 &KCI-USD99), Architectural Institute of Korea (AIK-WSD2K), China Standard((GB50010-02),Taiwan Standard (TWN-USD92)  and Indian Standard (IS456:2000) are available upon request.

From the Main Menu select Design > Concrete Code Design > Wall Design.

Shortcut key : [Ctrl]+4

The automatic design results "sorted by Wall ID+Story" are based on the maximum axial forces, biaxial moments and shear forces calculated at the element locations, I & J, in accordance with the load combinations for concrete design. Factored strength ratios with respect to the design strengths are evaluated on the basis of P-M interaction diagrams.

The automatic design results "sorted by Wall ID" are based on the maximum vertical rebar ratios extracted from the P-M diagrams considering Wall ID+Story for each element, sectional locations and the load combinations for concrete design.

The results appear in blue when the automatic design for the given lengths and thicknesses are satisfactory, otherwise they appear in red which represent the results are unsatisfactory.

The automatic design results are produced in the unit system selected by the user.

The automatic design provides optimal rebar sizes and spacings satisfying the rebar (vertical, horizontal) spacing and the rebar ratios. The user may enter the rebar information (vert. reinf. -max. 5 types, end rebar size, horizontal rebar size).

When the user elects not to enter the rebar data, the program automatic ally uses #4 for the vertical rebars, #3 for end rebars and #3 for horizontal rebars.

ACI318-02 RC-Wall Design Results Dialog Box

Wall ID+Story: Wall number and story

WID: Wall number entered by the user

Story: Story name defined in the structural analysis model

SEL: Select members for redesign and production of results

Wall Mark: Designation for shear wall member

Lw: Length of shear wall member

HTw: Story height of shear wall member

hw: Thickness of shear wall member

f'c: Design compressive strength of concrete

fy: Design yield strength of vertical rebars

fys: Design yield strength of horizontal rebars

CHK: Status of automatic design results (Results are produced in the state for convenience)

= "OK": Automatic design results satisfy the design strength for the factored axial force, moment and shear force

= "P**": Automatic design results do not satisfy the design axial strength for the factored axial force

= "*M*": Automatic design results do not satisfy the design strength for the factored moment

= "**V": Automatic design results do not satisfy the design strength for the factored shear force

= "PM*": Automatic design results do not satisfy the design strength for the factored axial force and moment

= "*MV": Automatic design results do not satisfy the design strength for the factored moment and shear force

= "P*V": Automatic design results do not satisfy the design strength for the factored axial force and shear force

= "PMV": Automatic design results do not satisfy the design strength for the factored axial force, moment and shear force

Pu: Factored compression (tension) force acting on the shear wall member under the load combination displayed in LCB (Mu)

= Pu > 0: Compressive axial force acting in the member's axial direction

= Pu < 0: Tensile axial force acting in the member's axial direction

Mc, LCB: Factored bending moment and the corresponding load combination that produces the maximum rebar ratio in the P-M

interaction diagram.

As-V: Vertical rebar quantity (LengthUnit 2 / LengthUnit x 100 ) calculated by the program. The larger of the calculated rebar

area and the minimum rebar quantity specified in the codes is presented. The end rebars are separately identified by number

and spacing and excluded from AsV.

Note
Required shear reinforcing area is expressed in the unit system being used.  For units, mm, cm and m, the area is expressed in mm2/m, cm2/m and m2/m respectively.  If the units are in and ft, the area is expressed in in2/ft and ft2/ft respectively.

V-Rebar: Optimum placement of vertical rebars, AsV, using the rebar sizes entered by the user.

The following are displayed for V-Rebar based on the automatic design results :

= #xx @yyy", "Dxx @yyy"

xx is the designated standard rebar size, yyy is the rebar spacing (unit: inch).

= "Not Use"

Rebar sizes satisfying the minimum rebar spacing specified in the codes do not exist.

Vu, LCB: Maximum factored shear force occurring in the relevant wall element and the corresponding load combination.

As-H: Reinforcing steel section area (LengthUnit 2 / LengthUnit x 100 ) required for the horizontal shear force calculated by

the program. The larger of the calculated rebar area and the minimum rebar quantity specified in the codes is presented.

Note
Required shear reinforcing area is expressed in the unit system being used.  For units, mm, cm and m, the area is expressed in mm2/m, cm2/m and m2/m respectively.  If the units are in and ft, the area is expressed in in2/ft and ft2/ft respectively.

H-Rebar: The required rebar spacing based on AsH using the standard size for horizontal rebars entered by the user.

The following are displayed for H-Rebar based on the automatic design results :

= #xx @yyy, "Dxx @yyy"

xx is the standard rebar size designation and yyy is the rebar spacing (unit: inch).

= "Failure"

Note

  is stipulated by IS456:2000 as follows:

End-Rebar: Optimal placing of end-rebars automatically calculated using the rebar diameter equal to or larger than the rebar size entered by the user.

The following are displayed in End-Rebar based on the automatic design results.

= "nn-Dxx@yyy", "nn-#xx@yyy"

nn is the number of end rebars, xx is the standard rebar size and yyy is the rebar spacing (unit: mm).

= "Not Use"

The minimum rebar spacing specified in the codes can not be satisfied or the wall member length is insufficient to reinforce.

Bar Layer: Number of layers for vertical rebars. Only 2 layers are used.

Common Control

Display the applicable code and design method (selected among Method1, Method2, Method3 & Method4) for automatic design.

"Sorted by Wall ID+Story" displays the design results including the maximum vertical rebar ratios obtained from the P-M interaction diagrams and factored shear forces at the positions (I&J) based on all the load combinations.

"Sorted by Wall ID" displays the design results of the maximum vertical rebar ratios obtained from the P-M interaction diagrams and factored shear forces by examining all the shear wall members attributed to the relevant lengths and thicknesses. Since the results do not pertain to a single element, "Wall ID+Story" is "0".

Once Wall ID is selected, SEL controls every "Wall ID+Story" pertaining to the same "Wall ID".

 : Display the unit system selected by the user.

:Update the rebar quantity for each "Wall ID+Story" in the rebar design data.

The updated rebar data are used for strength verification.

 : Select all members

 : Cancel the selection of all members

Redesign the selected members. When the redesign is executed from the results displayed by section properties, all the members

attributed to the same sections are included. This option can be used even when the rebar splice data is changed.

Note

When modifying design parameters ('Modify Concrete Material', etc.) that can affect all the design results, this option cannot be used since the design results will be deleted.

 : Display detail automatic design results

 : Display simplified automatic design results

 : Produce the automatic design results in summary calculations for the selected members.

 : Produce the automatic design results in detail calculations for the selected members.

The design results "Sorted by Wall ID+Story" support the detail calculations.

 : Produce the summary list of automatic design results for the selected members.

"Sorted by Wall ID" produces the results pertaining to the maximum vertical reinforcing, representing all the walls of same ID's.

Plot the results and the corresponding P-M interaction diagram applicable for the factored axial force and biaxial moments.

All: Produce all the auto-designed results in the Design Results dialog box

OK: From the auto-designed results, display only the design results that have met the design requirements (OK) in the Design Results dialog box

NG: From the auto-designed results, display only the design results that have not satisfied the design requirements (NG) in the Design Results dialog box

 : Check in the option to select and highlight the selected members in Model View.

 : Close the dialog box

Sorting output results

 : Sort design results by Wall Marks and the stories of Wall ID

Select the sorting reference.

Select a unit system for output.

List for Selecting

List the names of wall members to be selected

List for Printing

List the names of the selected wall members

Select the story sorting sequence (ascending or descending)

SEL: Select the stories for which the results are to be produced

Story: Assigned floors

 : Send the selected Wall ID or Wall Mark from List for Selecting to List for Printing

 : Remove the selected Wall ID or Wall Mark from List for Printing

 : Select all stories

 : Cancel the selection of all stories

Produce the summary list of the design results for the selected members. Produce the maximum values for each Wall Mark or Wall ID at the selected story.

Produce the required reinforcing quantity for each Wall Mark or Wall ID at the selected story.

 : Close the dialog box