Eurocode 7 (2024)
Eurocode 7 2024 — VC3 + M2, Seismic
EN 1998-5:2024Revision 2Required FoS ≥ 1Seismic design situation
Use it in Slope
In a design, choose it under Analyze → Design factor set, and the PDF report runs it too.
Checked against the standard · Not yet validated
Known limitations
- ψ2 is 0.3 for every variable load; EN 1990 gives ψ2 per load category (0.3 for imposed loads A/B, 0 for road traffic TS, snow and wind).
- The consequence class enters through the seismic action (EN 1998-5:2024 Tables 4.2–4.4), not through kM.
- Reinforcement is unfactored (Slope convention, not validated): EN 1997-3's reinforcement tables cover fundamental situations only; the absence of a factor does not show the unfactored capacity is adequate.
- The cyclic undrained strength τcy,u (γτcy,u = 1.25) has no input.
Values
Actions
| Soil weightγ | Unfavorable | ×1.00 |
| Favorable | ×1.00 | |
| Permanent loadγG | Unfavorable | ×1.00 |
| Favorable | ×1.00 | |
| Variable loadγQ | Unfavorable | ×0.30 |
| Favorable | ×0.00 | |
| Seismic coefficientγE | ×1.00 | |
Resistance
| Earth / global resistanceγRe | ÷1.00 | |
Materials
| Effective cohesionγc′ | ÷1.00 | |
| Friction (tanφ′)γφ | ÷1.00 | |
| Undrained strength (cu)γcu | ÷1.00 | |
| Shear strength (other models)— | ÷1.00 | |
Sources
Document: EN 1998-5:2024
Actions
| Factor | Value | Source |
|---|---|---|
| Soil weight — unfavorable | ×1.00 | 7.2.2.2(7), PDF p37 · Not yet validated |
| Soil weight — favorable | ×1.00 | 7.2.2.2(7), PDF p37 · Not yet validated |
| Permanent load — unfavorable | ×1.00 | 7.2.2.2(7), PDF p37 · Not yet validated |
| Permanent load — favorable | ×1.00 | 7.2.2.2(7), PDF p37 · Not yet validated |
| Variable load — unfavorable | ×0.30 | EN 1990:2023, 8.3.4.4, Formula (8.16); Table A.1.7, PDF p59, p73 · Slope convention · Not yet validated — ψ2 = 0.3 for every variable load (imposed loads A/B); EN 1990 gives ψ2 per load category. |
| Variable load — favorable | ×0.00 | EN 1990:2023, 8.3.4.4, Formula (8.16), PDF p59 · Slope convention · Not yet validated — The seismic combination takes accompanying variable actions only; a helping one is omitted. |
| Seismic coefficient | ×1.00 | 7.2.2.2, Table 7.1, PDF p37 · Slope convention · Not yet validated — Slope applies kh and kv as entered: enter kh = αH = (βH/χH)·PGA/g. |
Materials
| Factor | Value | Source |
|---|---|---|
| Effective cohesion | ÷1.00 | 6.5(2) NOTE, PDF p34 · Not yet validated |
| Friction (tanφ′) | ÷1.00 | 6.5(2) NOTE, PDF p34 · Not yet validated |
| Undrained strength (cu) | ÷1.00 | 6.5(2) NOTE, PDF p34 · Not yet validated |
| Shear strength (other models) | ÷1.00 | 6.5(2) NOTE, PDF p34 · Slope convention · Not yet validated — 6.5(2) sets every listed soil factor to 1.0; other strength models take 1.0 as well. |
Resistance
| Factor | Value | Source |
|---|---|---|
| Earth / global resistance | ÷1.00 | 7.2.2.2(7), PDF p37 · Not yet validated |