Function
- Check the internal forces and stresses of plate elements from the analysis results in a spreadsheet format table.
- Table Tool in midas Civil offers a variety of powerful built-in functions. Refer to Usage of Table Tool for detail directions.
Call
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Force & Stress]
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Force (Local)]
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Force (Global)]
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Force (Unit Length)]
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Stress (Local)]
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Stress (Global)]
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Strain (Local)]
From the main menu, select [Results] tab > [Type : Analysis result] > [Table] group > [Result Tables] > [Plate] > [Strain (Global)]
Input
When you execute the Plate > Force & Stress Table function, the Records Activation Dialog is displayed. Here, you can select the target nodes, elements, load conditions, construction stages, and more, and then click the OK button. If you click Cancel, the table will be generated for all the targets, which may take a considerable amount of time depending on the case.
Refer to Results Table of "Usage of Table Tool" for the usage of Records Activation Dialog.
Refer to Usage of Table Tool and check the following data:
1. Plate Force (Local)
Elem : Element number
Load : Unit load case/combination
Stage : Construction stage
Step : Sub-stage
Node : Node number
Fx : Element's internal force in the element's local x-direction
Fy : Element's internal force in the element's local y-direction
Fz : Element's internal force in the element's local z-direction
Mx : Bending moment about the element's local x-axis
My : Bending moment about the element's local y-axis
Mz : Bending moment about the element's local z-axis
2. Plate Force (Global)
Elem : Element number
Load : Unit load case/combination
Stage : Construction stage
Step : Sub-stage
Node : Node number
FX : Element's internal force in GCS X-direction
FY : Element's internal force in GCS Y-direction
FZ : Element's internal force in GCS Z-direction
MX : Bending moment about GCS X-axis
MY : Bending moment about GCS Y-axis
MZ : Bending moment about GCS Z-axis
When performing moving load analysis, only the member forces per unit length are required. Therefore, when using the Plate Force (Local, Global) Table to output nodal forces, the results will be displayed as '0' since they are not relevant in this case.
Elem : Element number
Load : Unit load case/combination
Stage : Construction stage
Step : Sub-stage
Node : Node number
Fxx : Axial force per unit width in the element's local x-direction
Fyy : Axial force per unit width in the element's local y-direction
Fxy : Shear force per unit width in the element's local x-y plane (In-plane shear)
Fmax : Maximum principal axial force per unit width
Fmin : Minimum principal axial force per unit width
Angle : Angle formed by the element's local x-axis and the axis of the maximum principal axial force
Mxx : Bending moment per unit width in the x-axis direction of the element coordinate system.
Myy : Bending moment per unit width in the y-axis direction of the element coordinate system.
Mxy : Torsional moment per unit width about the element's local x-y axes
Mmax : Maximum principal bending moment per unit width
Mmin : Minimum principal bending moment per unit width
Angle : Angle formed by the element's local x-axis and the axis of the maximum principal bending moment
Vxx : Shear force per unit width in the thickness (z) direction on the element's local y-z plane
Vyy : Shear force per unit width in the thickness (z) direction on the element's local x-z plane
4. Plate Stress (Local)
Elem : Element number
Load : Unit load case/combination
Node : Node number
Stage : Construction stage
Step : Sub-stage
Part : Top or bottom fiber of a plate element in the element's local z-direction
Sig-xx : Axial stress in the element's local x-direction
Sig-yy : Axial stress in the element's local y-direction
Sig-xy : Shear stress in the element's local x-y plane (In-plane shear)
Sig-Max : Maximum principal stress
Sig-Min : Minimum principal stress
Angle : Angle formed by the element's local x-axis and the axis of the maximum principal stress vector. Angle is not generated for Envelop Type load combination since concurrent stresses cannot be calculated for the Envelop Type load combination.
Sig-EFF : Effective stress (von-Mises Stress)
For the method of calculating principal stresses, effective stresses and maximum shear stresses for each load combination type, refer to the explanations at the bottom of the Combinations page.
5. Plate Stress (Global)
Elem : Element number
Load : Unit load case/combination
Stage : Construction stage
Step : Sub-stage
Node : Node number
Part : Top or bottom fiber of a plate element in GCS Z-direction
Sig-XX : Axial stress in GCS X-direction
Sig-YY : Axial stress in GCS Y-direction
Sig-ZZ : Axial stress in GCS Z-direction
Sig-XY : Shear stress in GCS X-Y plane
Sig-YZ : Shear stress in GCS Y-Z plane
Sig-XZ : Shear stress in GCS X-Z plane
Sig-Max : Maximum principal stress
Sig-Min : Minimum principal stress
ANG : Angle formed by GCS X-axis and the axis of the maximum principal stress vector. Angle is not generated for Envelop Type load combination since concurrent stresses cannot be calculated for the Envelop Type load combination.
Sig-EFF : Effective stress (von-Mises Stress)
The Stage and Step columns in the Analysis Result Table are produced for a construction stage analysis or Hydration Heat Analysis. The Step column is produced also for a geometric nonlinear analysis.
The calculation method for principal stress, von Mises stress, and maximum shear stress based on the load combination type is described in the "Combinations" section.
6. Wood Armer moment (Unit Length)
Elem : Element number
Load : Unit load case/combination
Stage : Construction stage
Step : Sub-stage
Node : Node number
Ma : Bending moment per unit width about a-axis
Mb : Bending moment per unit width about b-axis
Mab : Twisting moment per unit width about a-b axes
W-A Moment Top/Bot Dir1/2 : Wood Armer moment value for the respective preceding combination of moments.
1 Wood-Armer formula for skew reinforcement
Slab Design Forces
midas Civil provide design forces in the reinforcement directions for skew reinforcement according to the Wood-Armer formula.
From the analysis results, following plate forces about the local axis are calculated.
- mxx
- myy
- mxy
In order to calculate design forces in the reinforcement direction, angle α and φ will be taken as following figure:
x, y: local axis of plate element
1, 2: reinforcement direction
α: angle between local x-direction and reinforcement direction 1
φ: angle between reinforcement direction 1 and reinforcement direction 2
Firstly, internal forces (mxx, myy and mxy) are transformed into the a-b coordinate system.
Then, Wood-Armer moments are calculated as follows:
2
Values of Ma, Mb and Mab are repeated four times in the table, because for moving load analysis, midas Civil takes into account different combinations of concurrent forces in order to achieve maximum wood armer moment for top or bottom rebar parts in any specified direction. E.g. the combination of moments to be used for maximizing “top dir-1” and “bot dir-1” moments may be quite different since the concurrent forces required to maximize these moments can be different.