Principal Stress at Service Loads
Check the principal stresses at service loads 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.
|
Principal stress (Shear + Torsion) = |
|
From the Main Menu select PSC > PSC Design Result Table > Principal Stress at Service loads
Upon executing the PSC Design Result Table > Principal Stress at Service loads ( at the maximum torsion), Records Activation Dialog prompts. Click .jpg){kind=small}
after selecting the output entities such as elements, part number, Comp./Tens. Stress.
Refer to Usage of Table Tool and check the following data:
(t).jpg)
Elem: Element number
Part: Check location (I-End, J-End) of each element
Comp./Tens.: Compression or Tension Stress
LCom. Name: Load combination name.
Type: Displays the set of member forces corresponding to moving load case or settlement load case for which the maximum stresses are produced. If it is not defined then this field is left blank(-)
By default, member forces due to moving load case or settlement load case are not concurrent. In order to consider the concurrent member forces, namely, Fx, Fy, Fz, Mx, My and Mz each having its MAX. and MIN value, the program computes FT, FB, FTL, FBL, FTR, FBR for all these twelve sets.
For example: FT when Fx due to moving load is maximum is 30 N/mm2 and so on..
|
|
FT |
FB |
FTL |
FBL |
FTR |
FBR |
|
Fx- MAX |
30 |
40 |
25 |
35 |
35 |
30 |
|
Fx- MIN |
35 |
30 |
48 |
15 |
25 |
15 |
|
Fy- MAX |
30 |
32 |
37 |
26 |
28 |
21 |
|
Fy- MIN |
25 |
35 |
32 |
28 |
29 |
21 |
|
Fz- MAX |
18 |
15 |
19 |
14 |
15 |
10 |
|
Fz- MIN |
15 |
11 |
12 |
14 |
18 |
10 |
|
Mx- MAX |
1 |
2 |
4 |
1 |
2 |
3 |
|
Mx- MIN |
0.5 |
0.5 |
1 |
1 |
3 |
2 |
|
My- MAX |
18 |
19 |
15 |
22 |
21 |
18 |
|
My- MIN |
14 |
10 |
11 |
15 |
14 |
12 |
|
Mz- MAX |
3 |
9 |
12 |
11 |
8 |
9 |
|
Mz- MIN |
2 |
3 |
8 |
5 |
6 |
7 |
The set that results in maximum stress value FT, FB, FTL, FBL, FTR, FBR is displayed under 'Type' and the maximum stress value is displayed under FMAX. So as per above example, maximum stress value is 48, so it is displayed under FMAX, and it is from Fx-MIN set so under Type, Fx-MIN is displayed. All the values of this set will be displayed.
CHK: Principal stress check for service loads at maximum shear force.
Sig_P1: Principal Stress at the left top of top flange.
Sig_P2: Principal Stress at the right top of top flange.
Sig_P3: Principal Stress at the right bottom of bottom flange.
Sig_P4: Principal Stress at the left bottom of bottom flange.
Sig_P5: Principal Stress at the top of left web.(at Z1 Level)
Sig_P6: Principal Stress at the top of right web.(at Z1 Level)
Sig_P7: Principal Stress at the neutral axis in left web.(at Z2 Level)
Sig_P8: Principal Stress at the neutral axis in right web.(at Z2 Level)
Sig_P9: Principal Stress at the bottom of left web.(at Z3 Level)
Sig_P10: Principal Stress at the bottom of right web.(at Z3 Level)
Sig_MAX: The maximum Principal stress among P1-P10.
Sig_AP: Allowable principal stress at neutral axis in the web.
Note Allowable tensile principal stress limit for AASHTO LRFD (2012) and CSA-S6S1-2010
Principal tensile stress at neutral axis in web is determined based on the clause 5.9.4.2.2 of AASHTO LRFD (2012).
Principal tensile stress limit =
(ksi)
Where, f’c is specified compressive strength of concrete for the use in design.