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CFRP confinement of bridge columns damaged by premature concrete deterioration: a case study in Texas

机译：CFRP约束过早损坏混凝土的桥梁柱：以德克萨斯州为例

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摘要

In 1998, the Texas Department of Transportation (TxDOT) identified two concrete distress mechanisms occurring on its bridge over Lake Ivie in the west central part of the state: alkali-silica reaction (ASR) and delayed ettringite formation (DBF), collectively referred to by TxDOT as premature concrete deterioration (PCD). The agency sponsored two research projects to investigate the problem. One focused on determining the remaining capacity of PCD-damaged concrete members with a case study of the Lake Ivie bridge and the other assessed treatments that could be applied to members with PCD damage. Based on findings of the study, TxDOT applied a system that waterproofed the damaged columns and then confined them using resin-bonded carbon fibre reinforced polymer (CFRP) fabric strips. This paper describes the efforts of TxDOT to mitigate PCD damage for its Lake Ivie bridge.
机译：1998年，得克萨斯州交通运输部（TxDOT）确定了在州西部中部伊维湖上的桥上发生的两种具体的遇险机理：碱-硅反应（ASR）和延迟钙矾石形成（DBF），统称为被TxDOT视为混凝土过早劣化（PCD）。该机构赞助了两个研究项目来调查这个问题。其中一项重点是通过对艾维湖大桥的案例研究来确定受PCD损坏的混凝土构件的剩余承载力，另一项评估则适用于受PCD损坏的构件。根据研究结果，TxDOT应用了一种对受损柱进行防水处理，然后使用树脂粘结的碳纤维增强聚合物（CFRP）织物条将其封闭的系统。本文介绍了TxDOT减轻其Ivie湖大桥PCD损坏的努力。

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