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PERFORMANCE LEVEL 3 BRIDGE RAILINGS.
| 题名： | PERFORMANCE LEVEL 3 BRIDGE RAILINGS. |
| 作者： | Menges-WL; Buth-CE; Bullard-DL Jr.; McDevitt-CF |
| 关键词： | BRIDGE-RAILINGS; DESIGN-FEATURES; CONTAINMENT-; REDIRECTION-; HEAVY-VEHICLES; TRUCKS-; BUSES-VEHICLES; PERFORMANCE-TESTS |
| 摘要： | Many existing bridge railings have been designed to restrain and redirect passenger vehicles. Because of specific site conditions, some locations along the nation's highways require that bridge railings contain and redirect heavier vehicles, such as commercial trucks and buses. These sites include areas where the consequences of failure to contain a vehicle would be severe. Examples include bridges that are grade separation structures crossing heavily congested traffic lanes, areas of reduced radius of curvature, elevated ramps near schools or hospitals, and other areas where additional protection is needed to prevent heavier vehicles from penetrating or rolling over the bridge railing. According to the 1989 American Association of State Highway and Transportation Officials (AASHTO) "Guide Specifications for Bridge Railings", these sites require Performance Level 3 (PL3) bridge railings. Two PL3 bridge railings were developed under a recently completed pooled funds study sponsored by the Federal Highway Administration, the District of Columbia, and 23 states. The 1.07-m (42-in.) F-shape bridge railing and the 1.07-m (42-in.) concrete parapet were tested and evaluated according to the PL3 requirements of the 1989 AASHTO guide. Both bridge railings performed acceptably. |
| 总页数： | Transportation Research Record. 1995. (1500) pp92-101 (30 Phot., 6 Fig., 5 Tab., 7 Ref.) |
| 报告类型： | 科技报告 |
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