Xponexus Engineering

Punching Shear – Eurocode 2 (EN 1992-1-1)

Comprehensive punching shear check for slabs and pad footings, including: u0 face stress check, u1 at 2d, edge/corner truncation via geometry distances, opening reductions, optional moment-transfer magnification β, determination of uout, and EC2-style punching shear reinforcement sizing (Asw) with multiple rings.

u0 & vRd,max u1 (2d) & vRd,c Openings & edges β factor Shear studs/links uout
Scope note (important):
This calculator follows the common EC2 punching workflow and widely used expressions, but your project may require National Annex choices, rigorous β methods, FE-derived VEd distributions, and detailing rules (stud layouts, anchorage, edge distances, drops, etc.). Treat as design-assist, then verify against EC2 + NA + office standard.

Materials & partial factors

Concrete/steel auto-fill; adjust γ-factors and αcc per National Annex.

Auto-fill
Concrete
Steel
Shear parameters (EC2 style)

ρl is the mean flexural reinforcement ratio in orthogonal directions. This tool can compute it from As,x & As,y per metre, or accept a manual value.

Element, thickness & reinforcement for d and ρl

Supports slabs and pad footings. d is computed from cover + bar diameter (simplified).

d & ρ
Element type
Thickness & effective depth

For most slab/footing punching, d is taken to the tension reinforcement. Here we provide a practical computation + manual override.

Flexural reinforcement for ρl (per metre width)

EC2 punching expressions are commonly used with practical clamps on ρ (office-standard varies). Toggle if you prefer unbounded.

Loaded area (column/pedestal/wall stub) & slab edges

Internal/edge/corner behavior is captured by geometry distances to free edges (truncation).

u0/u1 geometry
Loaded area shape
Distances from column face to slab free edges

Put a large number (e.g. 99999) to represent “no nearby edge” (internal). For an edge column, set one side small. For a corner, set two adjacent sides small.

Control perimeter definition

EC2 allows reducing u for openings near the column (and sometimes for irregular boundaries). You can model openings explicitly below, or apply a manual Δu reduction.

Design actions at support

Provide the design vertical shear VEd. For footings you may subtract favorable soil pressure if your method permits (optional).

VEd + β
Design vertical shear
Moment transfer magnification β

EC2 simplified approach often uses β ≈ 1.15 / 1.40 / 1.50 for internal/edge/corner when stability does not rely on frame action and spans are similar. For rigorous β (biaxial), keep manual and input your computed β.

Openings near column (optional)

Full EC2 opening treatment uses “dead zones” (Fig. 6.14). Here you can either apply a conservative factor or a direct reduction in perimeter length based on your own dead-zone construction.

Punching shear reinforcement (studs/links) – EC2-style sizing

If vEd,1 > vRd,c at u1, design Asw per perimeter ring. Tool also estimates uout where vEd = vRd,c.

vRd,cs & uout
Provide shear reinforcement?

Detailing limits (e.g. sr ≤ 0.75d, first ring distance, rail spacing, anchorage) are not fully enforced here—use your office checks/EC2 detailing.

Shear reinforcement strength
Optional: Provided Asw per ring

Check summary

ULS punching
u0 (face) vEd ≤ vRd,max
u1 (basic) vEd ≤ vRd,c
Shear reinforcement vEd ≤ vRd,cs
Outer perimeter uout

Utilisation ratios

Perimeter vs demand (visual)

Detailed engineering report

Intermediate values printed for transparency and audit trail.