hera-logo-black
Members

Your cart is currently empty!

Join HERA
Let’s korero
  • Technical supportTautoko hangarau
  • ResearchRangahau
  • Training & eventsWhakangungu me nga huihuinga
  • News + insightsRongo
  • About usMō mātou
Let’s korero
Members
Join HERA
fea-corroded plate
July 7, 2023

Assessing the remaining load carrying capacity of corroded steel


Corrosion often occurs in well-hidden, difficult to access locations in steel structures, where water and debris accumulate over time.

Regular inspections might overlook these areas and sometimes they are only discovered when severe loss of cross section has already occurred.

This is the time when structural engineers face the challenge of assessing the remaining capacity of the steel members/plates/connections and must decide what can be done. 

Advanced numerical tools allow the accurate mapping of in-situ corrosion (i.e., modelling corroded plates with varying thicknesses as measured), calculate the forces transferred through the structural steel and to predict the ultimate limit state (ULS). It is also possible to add welds and/or other plates/cleats/fasteners to an already stressed structure and to calculate the response (stress, strain, deformation, and others) of the strengthened structure, evaluating the benefits of different options. 

Initial imperfections can also be included in the non-linear static or dynamic simulations. HERA used Abaqus finite element software to assist a member company in this respect recently.

Assessing and extending the life of existing structures with such an issue saves resources in many fronts (costs, interruptions, sustainability, etc.).  

An illustrative example of a corroded plate and added repair weld is shown below. Only the bottom half of the repair weld and the resultant force transferred through the weld is shown for clarity. 

fea-corroded plate

Author

  • Nándor Magó

    Nándor Magó

    Finite Element Analyst

    Visit profile : Nándor Magó


←Previous: Resource: Construction 4.0 through a narrow & broad perspective
Next: Resource: Public governance in the context of Construction 4.0→

Follow our newsletter

Stay in the loop with our regular newsletter. Straight from our intellectual smelter, each issue contains plenty of education, inspiration, and connecting to what is important to our industry!

Subscribe


Industry awards

Our structure & governance

Our history

HERA Foundation

Venue hire

HERA House 
17 – 19 Gladding Place
Manukau City
Auckland


P O Box 76134
Manukau, Auckland 2241
New Zealand


Waeaatia (Call us):

+64 9 262 2885


General email enquiries:

info@hera.org.nz

Structural enquiries:

structural@hera.org.nz

Fabrication enquiries:

welding@hera.org.nz


@Copyright HERA 2024

Terms and conditions

Use of AI

Privacy policy

Refunds and returns

Site by Glue