Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Full-Depth Shear-Key Performance in Adjacent Prestressed-Beam Bridges
Bridge decks supported by adjacent precast/prestressed-concrete beams have become increasingly popular in recent years due to their ease of consruction, shallow superstructure, and aesthetic appeal. In New York, such structures are built by placing a number of precast beams alongside one another and connecting them through grouted keyways called 'shear keys.' After the grout hardens, the beams are transversely post-tensioned and a composite, cast-in-place deck is poured over them. Before 1992, field inspection personnel frequently reported the appearance of longitudinal deck cracking over these partial-depth shear keys soon after construction. In response, a new system using full-depth shear keys with more transverse tendons was adopted in 1992. Since then, more than 100 such bridges have been built statewide. To evaluate their performance, a followup inspection survey was conducted in 1996 on 91 such bridges. Results indicate that frequency of shear-key-related deck cracking had been reduced significantly.
Full-Depth Shear-Key Performance in Adjacent Prestressed-Beam Bridges
Bridge decks supported by adjacent precast/prestressed-concrete beams have become increasingly popular in recent years due to their ease of consruction, shallow superstructure, and aesthetic appeal. In New York, such structures are built by placing a number of precast beams alongside one another and connecting them through grouted keyways called 'shear keys.' After the grout hardens, the beams are transversely post-tensioned and a composite, cast-in-place deck is poured over them. Before 1992, field inspection personnel frequently reported the appearance of longitudinal deck cracking over these partial-depth shear keys soon after construction. In response, a new system using full-depth shear keys with more transverse tendons was adopted in 1992. Since then, more than 100 such bridges have been built statewide. To evaluate their performance, a followup inspection survey was conducted in 1996 on 91 such bridges. Results indicate that frequency of shear-key-related deck cracking had been reduced significantly.
Full-Depth Shear-Key Performance in Adjacent Prestressed-Beam Bridges
J. Lall (Autor:in) / E. F. Dicocco (Autor:in) / S. Alampalli (Autor:in)
1997
34 pages
Report
Keine Angabe
Englisch
Damage Identification for Prestressed Adjacent Box-Beam Bridges
| Tema Archiv | 2014
| British Library Online Contents | 2017