How to Design FRP Strengthening of an Existing Beam to TR55 (Step by Step, With Free Software)
Strengthening an existing beam with FRP per the UK Concrete Society's TR55 guidance starts with a step that has nothing…
Why Pile Cap Thickness Is Usually Governed by Shear, Not Bending
A Short, Deep Member Behaving Differently Than an Ordinary Slab Pile caps are relatively short-span, thick, heavily loaded members —…
How to Design an FRP-Reinforced Concrete Beam to CSA S806 (Step by Step, With Free Software)
A concrete slab reinforced with carbon FRP (CFRP) bars, designed to CSA S806, often finds its governing check isn't flexural strength…
Alkali-Silica Reaction: When the Aggregate Itself Is the Problem
A Deterioration Mechanism That Starts Inside the Aggregate, Not the Paste Most concrete durability problems discussed in this series —…
How to Design FRP Strengthening of an Existing Beam to fib Bulletin 40 (Step by Step, With Free Software)
Strengthening an existing, under-capacity concrete beam with externally bonded carbon FRP (CFRP) laminate, designed per fib Bulletin 40, introduces a failure mode…
Sulfate Attack: Why Some Soils and Groundwater Are Hostile to Ordinary Concrete
A Chemical Attack From Outside, Not a Loading Problem Sulfate attack is a durability mechanism distinct from the corrosion-driven deterioration…
How to Design an FRP-Reinforced Concrete Beam to ACI 440 (Step by Step, With Free Software)
A concrete beam reinforced with glass FRP (GFRP) rebar instead of steel, designed to ACI 440.1R, flips a familiar reinforced concrete…
How to Design a Prestressed Concrete Beam to CSA A23.3 (Step by Step, With Free Software)
A pretensioned prestressed concrete beam designed to CSA A23.3 needs a shear design approach that differs from ordinary reinforced concrete shear…
How to Design a Prestressed Concrete Beam to AS 3600 (Step by Step, With Free Software)
A post-tensioned beam designed to AS 3600 needs its long-term deflection checked under a load case that's easy to get wrong…
The Charles de Gaulle Terminal Collapse: A Design Pushed to Its Edge on Multiple Fronts at Once
A Striking, Architecturally Ambitious Structure, Less Than a Year Old In May 2004, a section of the recently opened Terminal…