Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rating Precast Prestressed Concrete Bridges for Shear
Shear capacity of real-world prestressed concrete girders designed in the 1960's and 1970's is a concern because AASHTO Standard Specifications (AASHTO-STD) employed the quarter-point rule for shear design, which is less conservative for shear demands than today's AASHTO LRFD. Shear tests were conducted on two full sized AASHTO Type II girders, one of which had been in service for nearly forty years before being replaced due to irreparable damage. The comparison of nominal shear capacities according to the 11th Edition AASHTO-STD (1973), AASHTO LRFD (2004), ACI 318-08 including provisions for strut and tie models is carried out. By examining the ratios of nominal shear capacity to demands for each code, considering all load and resistance factors, these code-lo-code comparisons are better able to identify girders that may be deficient according to today's standards than a direct comparison of nominal capacities alone. Experimental results for shear capacity of real-world girders are compared with the codes' nominal capacities to check if the girders are structurally sufficient.
Rating Precast Prestressed Concrete Bridges for Shear
Shear capacity of real-world prestressed concrete girders designed in the 1960's and 1970's is a concern because AASHTO Standard Specifications (AASHTO-STD) employed the quarter-point rule for shear design, which is less conservative for shear demands than today's AASHTO LRFD. Shear tests were conducted on two full sized AASHTO Type II girders, one of which had been in service for nearly forty years before being replaced due to irreparable damage. The comparison of nominal shear capacities according to the 11th Edition AASHTO-STD (1973), AASHTO LRFD (2004), ACI 318-08 including provisions for strut and tie models is carried out. By examining the ratios of nominal shear capacity to demands for each code, considering all load and resistance factors, these code-lo-code comparisons are better able to identify girders that may be deficient according to today's standards than a direct comparison of nominal capacities alone. Experimental results for shear capacity of real-world girders are compared with the codes' nominal capacities to check if the girders are structurally sufficient.
Rating Precast Prestressed Concrete Bridges for Shear
J. S. Pei (Autor:in) / R. D. Martin (Autor:in) / C. J. Sandburg (Autor:in) / T. H. K. Kang (Autor:in)
2008
123 pages
Report
Keine Angabe
Englisch
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