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| Titel: |
Impact of using higher strength concrete on the design of prestressed concrete bridges |
| Auteur: |
Gergess, Antoine N. Sen, Rajan |
| Verschenen in: |
Bridge structures |
| Paginering: | Jaargang 10 (2014) nr. 2-3 pagina's 77-85 |
| Jaar: |
2014-11-07 |
| Inhoud: |
AASHTO highway live loads are sometimes increased to idealize more realistic traffic conditions. Certain regions in the Middle East require increasing the AASHTO HL93 live loads by a 1.5 factor based on comparisons with the British Standards HA + HB live loads. Even in the US, the AASHTO live loads may not always represent modern state-legislated truck configurations. This paper shows the impact of using higher strength concrete on the design of precast, prestressed girders subjected to stringent loading and environmental conditions. A parametric study that relates the girder size and spacing to the span length for HL93 and 1.5 × HL93 live loads as a function of the concrete 28-day strength and environmental classifications is conducted for this purpose. It is shown that increasing the 28-day concrete strength from 40 (5800) to 50 MPa (7200 psi) allow increasing the HL93 live load by 50% and reducing the service load tension stress limit from 0.5$\surd{\rm f}^{\prime}$c, MPa (6$\surd{\rm f}^{\prime}$c, psi) to zero without drastically changing the precast girder size and configuration. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 6 gevonden artikelen
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