STUDY ON IMPROVING METHODS FOR HIGH MASONRY U-SHAPED ABUTMENT
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摘要: 石砌U型高桥台是西部山区公路建设中广泛采用的结构形式,也是一种受力复杂的砌体结构,在填土荷载和车辆荷载作用下经常发生局部开裂破坏这一有规律性的病害。为研究U型高桥台破坏机理并相应提出改进措施,解决局部开裂破坏问题,以模型试验及三维有限元数值模拟为研究手段,在分析常规U型高桥台破坏机理基础上,研究U型高桥台采用钢筋混凝土圈梁、前侧墙交界处倒角加固改进措施后的变形、破坏规律,分析改进措施的有效性。Abstract: Masonry U-shaped high abutment is a widely adopted structural form in western mountainous area.The partial cracks of regulation destroy often take place under the effect of earth fill and vehicle loading.In order to study the destruction mechanism of U-shaped high abutment and put forward improving methods to resolve the problem of partial cracks, the strength and destruction mechanism of the un-reinforced U-shaped abutment and reinforced U-shaped abutment are analyzed by model testing and finite element method simulation.As a result, the destruction mechanism of U-shaped high abutment is clear, and the validity of the improving method is also analyzed.
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