Shear strengthening of existing concrete bridges
Shear strengthening of existing concrete bridges
复制标题
现有混凝土桥梁的抗剪加固
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Ibell
中科院分区：
文献类型：
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作者：
P. Valerio;T. Ibell
现有混凝土桥梁的抗剪承载力往往不足，无法满足现行规范要求。这通常是由于交通负荷增加、原始设计中的抗剪强度不足或恶劣环境导致材料劣化造成的。本文讨论了现有混凝土桥梁的新型抗剪加固。建议将垂直钢或纤维增强塑料棒插入预先钻孔并使用环氧树脂固定到位。这种方法的优点是只需要进入混凝土桥梁（或板）的拱腹，从而在加固过程中保持顶面不受损坏。这使得桥梁可以在加固工程期间使用，而交通相对不受下面正在进行的工程的阻碍。此外，该方案不需要螺纹杆和板，解决了与现有剪切强化方案相关的臭名昭著的安装和维护问题。十个实验室...
The shear capacity of existing concrete bridge beams is often inadequate and unable to meet current code requirements. This is often due to increased traffic loads, inadequate shear-resistance provision in the original design or deterioration of materials due to aggressive environments. This paper deals with a new type of shear strengthening for existing concrete bridges. It is proposed that vertical steel or fibre-reinforced plastic bars be inserted into pre-drilled holes and fastened in place using epoxy resin. This method has the advantage that only the soffit of the concrete bridge beam (or slab) is required for access, allowing the top surface to remain undamaged during strengthening. This could allow the bridge to be used during strengthening works, with traffic relatively unhindered by work being carried out below. Further, no threaded bars and plates are required in this scheme, solving the notorious installation and maintenance problems associated with present shear-strengthening schemes. Ten lab...