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Assessment of Long-Time Behavior for Bridge Girders Retrofitted with Fiber Reinforced Polymer

Assessment of Long-Time Behavior for Bridge Girders Retrofitted with Fiber Reinforced Polymer
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摘要 Maintaining both the safety and serviceability of deteriorating highway bridge networks necessitates suitable BMS (bridge maintenance system) tools that can maximize cost effectiveness. Numerous experiments have been conducted to detect the long-term mechanical properties of the epoxy resin materials used in FRP (fiber reinforced polymers) strengthening and maintenance technique. Experiments were used to develop a short-term test and construct a model that can reliably predict the long-term behavior of epoxy resin. Furthermore, FEA (finite element analysis) models were developed, using the ANSYS software, to simulate three unstrengthened and FRP strengthened prestressed concrete girder bridges of different configurations. Models simulate the original and aged properties of construction and retrofitting materials under the application of AASHTO (American Association of State Highway and Transportation Officials) fatigue truck and a site-specific fatigue truck in different scenarios. These models were used to develop the bridge performance chart for the capacity of the bridge, with and without strengthening interventions, as a BMS tool. The results show an immediate significant improvement in the concrete tensile stress with the intervention of FRP strengthening.
机构地区 Department of Civil
出处 《Journal of Civil Engineering and Architecture》 2015年第9期1034-1046,共13页 土木工程与建筑(英文版)
关键词 Increasing heavy vehicle load bridge management FRP strengthening. 纤维增强聚合物 长时间行为 桥梁改造 复合材料 预应力混凝土梁桥 环氧树脂材料 FRP加固 ANSYS软件
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参考文献8

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  • 2Elfayoumy, A, 2015. Assessment of Long-Time Behavior for Bridge Girders Retrofitted with Fiber Reinforced Polymer (FRP) Using Accelerated-Time Concepts. A research project of University of Alabama.
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