Development of a rebar dowel anchorage system for attaching the California type 25 concrete barrier to existing bridges
Abstract
An anchorage system for attaching New Jersey-shaped concrete bridge replacement barrier onto existing concrete decks was developed. Initially dynamic pullout tests of rebar dowels were conducted to develop methods which would maximize pullout strengths. Ultimate pullout loads ranging from 25.0 kips to 34.8 kips were attained with individual no. 6 rebar dowels. Secondly, static load tests were performed on standards California Type 25 concrete barrier and replacement barriers to determine maximum horizontal loads which could be resisted. In preliminary tests, two 3-foot lengths of replacement barrier, attached with grouted no. 6 rebar dowels, withstood higher horizontal loads than did the standard Type 25 concrete barrier. A 16-foot-long replacement barrier withstood a maximum static horizontal load of 93 kips applied to a concentrated area about 26 inches above the deck surface.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- June 1979
- Bibcode:
- 1979STIN...8027534D
- Keywords:
-
- Bonding;
- Bridges (Structures);
- Concretes;
- Guards (Shields);
- Joints (Junctions);
- Dynamic Tests;
- Grout;
- Loads (Forces);
- Static Tests;
- Yield Strength;
- Engineering (General)