AS 5100.8:2017

Sets out requirements and procedures for the repair or rehabilitation, extension of remaining service life, strengthening to restore capacity due to structural deterioration, strengthening to increase capacity for live load, and changing the function of and widening of existing bridges.

This Standard sets out minimum requirements and procedures to—(a) repair or rehabilitate a structure in order to restore it to its original or intended level of service;(b) extend the remaining service life of the structure;(c) strengthen a structure (because of structural deterioration) to restore its original capacity;(d) strengthen a structure to increase its capacity for live load (such as in response to a proposed increase in vehicle loads), barrier loading, collision loading, earthquake loading and other loading;(e) change the function of a structure (such as a road bridge to a pedestrian/cyclist bridge);(f) widen an existing structure; or (g) any combination of the above.Structures covered in this Part of the AS(AS/NZS) 5100 series include existing bridges (both superstructure and sub-structure) approach slabs, wing walls and buried culverts.NOTES: 1 Rehabilitation or strengthening may not be feasible for those structures that—(a) have substandard horizontal and vertical clearances;(b) have a poor alignment both on the structure and on the approaches;(c) have extensive deterioration of the substructure, including active scour undermining, pronounced seismic vulnerability, and/or questionable foundations;(d) have numerous deficiencies throughout the superstructure and/or substructure;(e) have deficient in situ strength; or(f) have structural systems that are non-redundant or incorporate poor details that require increased maintenance and inspection.2 All the requirements of this Standard may not be applicable to emergency response situations.

First published as AS 5100.8:2017.