Function
- Generate a table summarizing the structural adequacy for the webs in beams with longitudinal stiffeners in the cross-section. The table contains two tabs to show the summary for the yielding of the web panels, the buckling of web panels, and longitudinal web stiffeners.
Call
From the main menu, select [Rating] tab > [Type : Steel Bridge] > [Assessment Code : CS454/20] > [Results] group > [Assessment Result Tables] > [Web Panel Reserve Factor (Beams with L. Stiffeners)]
Input
1. Web Yielding tab
Element : Element ID
Part : The i- or j-end of the element, giving the Node ID at that end in square brackets [Node ID]
Rating Case : The relevant Load Combinations for Assessment.
Sig_yw : The nominal yield stress for the web material.
Sig_1e_SV : The summation of the longitudinal stress (Eq. a, Clause 9.11.3, BS5400:3) due to SV load model.
Tau_SV : The average shear stress due to SV load model.
Sig_1e_DL : The summation of the longitudinal stress (Eq. a, Clause 9.11.3, BS5400:3) due to combined dead load and superimposed dead load.
Tau_DL : The average shear stress due to combined dead load and superimposed dead load.
Sig_1e_ST : The summation of the longitudinal stress (Eq. a, Clause 9.11.3, BS5400:3) due to ALL Model 2 loading.
Tau_ST : The average shear stress due to ALL Model 2 loading.
A : Structural Adequacy – calculated as the assessment resistance over the assessment load effects (RA*/SA*).
Psi : Reserve Factor against a special vehicle load model with the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.
Psi* : Reserve Factor against a special vehicle load model without the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.
Check : An overall indication whether the section passed all checks and is OK or Not Good (NG).
Structural adequacy (A), Psi, and Psi* are calculated as follows. The value of Sig_2 is assumed to be zero.
Psi x S* + SD* + SST* = RA*, Psi is determined with back-calculation from the equation.
Psi* x S* + SD* = RA*, Psi* is determined with back-calculation from the equation.
2. Web Buckling tab
Element : Element ID
Part : The i- or j-end of the element, giving the Node ID at that end in square brackets [Node ID]
Rating Case : The relevant Load Combinations for Assessment.
Stiffener/Flange : Components for the assessment.
Sig_yw : The nominal yield stress for the web material.
K1 : Axial coefficient
Kb : Bending coefficient
Kq : Shear coefficient
Sig_1_SV : The mean longitudinal stress on a cross-section of the panel due to SV load model.
Sig_b_SV : The average values of the maximum longitudinal stress due to in-plane bending of the individual panel due to SV load model.
Tau_SV : The average shear stress due to SV load model.
Sig_1_DL : The summation of the longitudinal stress (Eq. a, Clause 9.11.3, BS5400:3) due to combined dead load and superimposed dead load.
Sig_b_DL : The summation of the longitudinal stress (Eq. a, Clause 9.11.3, BS5400:3) due to combined dead load and superimposed dead load.
Tau_DL : The average shear stress due to combined dead load and superimposed dead load.
Sig_1_ST : The summation of the longitudinal stress (Eq. a, Clause 9.11.3, BS5400:3) due to ALL Model 2 loading.
Sig_b_ST : The summation of the longitudinal stress (Eq. a, Clause 9.11.3, BS5400:3) due to ALL Model 2 loading.
Tau_ST : The average shear stress due to ALL Model 2 loading.
A : Structural Adequacy – calculated as the assessment resistance over the assessment load effects (RA*/SA*).
Psi : Reserve Factor against a special vehicle load model with the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.
Psi* : Reserve Factor against a special vehicle load model without the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.
Check : An overall indication whether the section passed all checks and is OK or Not Good (NG).
Structural adequacy (A), Psi, and Psi* are calculated as follows.
Psi x S* + SD* + SST* = RA*, Psi is determined with back-calculation from the equation.
Psi* x S* + SD* = RA*, Psi* is determined with back-calculation from the equation.
3. Stiffener tab
Element : Element ID
Part : The i- or j-end of the element, giving the Node ID at that end in square brackets [Node ID]
Rating Case : The relevant Load Combinations for Assessment.
Sig_ls : The limiting stiffener stress.
Sig_se_SV : The stress at the effective stiffener area (Clause 9.11.5.2, BS5400:3) due to SV load model.
Sig_se_DL : The stress at the effective stiffener area (Clause 9.11.5.2, BS5400:3) due to combined dead load and superimposed dead load.
Sig_se_ST : The stress at the effective stiffener area (Clause 9.11.5.2, BS5400:3) due to ALL Model 2 loading.
A : Structural Adequacy – calculated as the assessment resistance over the assessment load effects (RA*/SA*).
Psi : Reserve Factor against a special vehicle load model with the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.
Psi* : Reserve Factor against a special vehicle load model without the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.
Check : An overall indication whether the section passed all checks and is OK or Not Good (NG).
Structural adequacy (A), Psi, and Psi* are calculated as follows.
Psi x S* + SD* + SST* = RA*, Psi is determined with back-calculation from the equation.
Psi* x S* + SD* = RA*, Psi* is determined with back-calculation from the equation.