Anchorage of longitudinal reinforcement: the design anchorage length l_{bd}
Eurocode 2 part 1-1: Design of concrete structures 8.4.4 (1)
The design anchorage length is:
l_{bd} = α_{1} α_{2} α_{3} α_{4} α_{5} l_{b,rqd} ≥ l_{b,min} | (8.4) |
where:
- α_{1} α_{2} α_{3} α_{4} α_{5} are given in Table 8.2
- α_{1}
- is for the effect of the form of the bars assuming adequate cover
- α_{2}
- is for the effect of concrete minimum cover
- α_{3}
- is for the effect of confinement by transverse reinforcement
- α_{4}
- is for the influence of one or more welded transverse bars (Φ_{t} ≥ 0,6Φ) along the design anchorage length l_{bd}
- α_{5}
- is for the effect of the pressure transverse to the plane of splitting along the design anchorage length l_{bd}
The product (α_{2} α_{3} α_{5}) ≥ 0,7 (8.5) - l_{b,rqd}
- is the basic required anchorage length
- l_{b,min}
- is the minimum anchorage length, if no other limitation is applied:
• for anchorages in tension: l_{b,min} ≥ max{0,3l_{b,rqd}; 10Φ; 100 mm} (8.6) • for anchorages in compression: l_{b,min} ≥ max{0,6l_{b,rqd}; 10Φ; 100 mm} (8.7)
This application calculates the design anchorage length l_{bd} from your inputs. Intermediate results will also be given.
First, change the following option if necessary: