Cable-supported bridges are classified into cable-stayed and suspension bridges.  Suspension bridges are one of the main types of long-span bridges and possess significant benefits in terms of material properties and height-span ratio of the stiffening girders. Suspension bridges are comprised of main beams, tower piers, cables, and anchorages, with the anchorages playing the major role in anchoring the suspension bridge’s main cables. Based on the main cable anchoring method, suspension bridges are classified into self-anchored or earth-anchored.

In a self-anchored bridge type, the main cable is directly attached to the stiffening girder, whereas in the earth-anchored type, the main cable is directly attached to the bridge via anchorages at the beginning  and end locations.

Anchorages are vital parts of earth-anchored suspension bridges, and support the tension of the main cables . Anchorages for earth-anchored suspension bridges can be classified into gravity and tunnel types.

In this study proposing, the pull-out behaviour of a tunnel-type anchorage considering  both geometric and rock joint characteristics.

Keywords: bridge, concrete, anchorage, analysis, force, stress.