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Load Distribution and Fatigue Cost Estimates of Heavy Truck Loads on Louisiana State Bridges.
| 题名： | Load Distribution and Fatigue Cost Estimates of Heavy Truck Loads on Louisiana State Bridges. |
| 作者： | Saber, A. |
| 关键词： | Bridges; Cost Estimates; Fatigue; Girders; Heavy Load; Highways; Impact; Load Distribtuion; Load Testing; Louisiana; Monitoring; Slab; Trucks; Weigh-in-motion |
| 摘要： | The bridge in this study was evaluated and a monitoring system was installed to investigate the effects of heavy loads and the cost of fatigue for bridges on state highways in Louisiana. Also, this study is used to respond to Louisiana Senate Concurrent Resolution 35 (SCR-35). The superstructure of the bridge in this study was evaluated for safety and reliability under four different kinds of truck configuration and loads hauling sugarcane. The bridge model was verified by performing live load tests using 3S3 trucks with a gross vehicular weight (GVW) of 100,000 lb. on the structure. The bridge finite element model was analyzed under the different kinds of loading and the effects were listed and compared. The results of the analyses show that the pattern of response of the bridge under the different cases follows the same trend. Among the four different cases of loading configurations, case 4, which was GVW =148,000 lb. and a vehicle length of 92 ft., produced the largest tensile and compressive stresses in the members. The results from the bridge deck analyses confirm that the bridge deck is under a stable stress state, whether the stresses are in the tension zone or the compression zone. The heavy load as indicated in SCR-35 will cause damage to bridges. |
| 报告类型： | 科技报告 |
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