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首页> 外文会议>Third International Conference on Earthquake Resistant Engineering Structures ERES Ⅲ, 3rd, Sep, 2001, Malaga >Retrofitting of large water retaining structures to withstand earthquakes
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Retrofitting of large water retaining structures to withstand earthquakes

机译：改造大型挡水结构以抵抗地震

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摘要

In many parts of the world, large water-retaining structures, including dams, were built during 1910-1960. Many of these dams have experienced alkali-silica reactions within the concrete and also have exhibited a lack of bonding stresses across horizontal construction lift surfaces. This is a result of using old construction techniques. With advancement of knowledge in earthquake engineering, these dams have been found to fail the modern seismic safety criteria. All such structures must now be analyzed for gravity-, reservoir-, temperature-, and earthquake-induced loads. The author has carried out several studies on different dams and has found that many dams are unsafe for earthquake conditions. Several methods for retrofitting exist, including strengthening of the dam by the use of epoxy-coated post-tensioning cables. This paper provides a case study of a 64.6-meter high double curvature thin dam structure that has been re-strengthened by the use of vertical post-tensioned cables. This paper summarizes various laboratory, field, construction, and performance studies for such large water-retaining structures. The techniques described here are applicable to other dam structures that are threatened by their exposure to maximum credible earthquakes.
机译：在世界许多地区，1910-1960年间建造了大型水保结构，包括水坝。这些大坝中的许多在混凝土中经历了碱-硅石反应，并且在水平施工举升面之间也缺乏粘结应力。这是使用旧的施工技术的结果。随着地震工程学知识的发展，已发现这些水坝未达到现代地震安全标准。现在必须分析所有这些结构的重力，水库，温度和地震引起的载荷。作者对不同的水坝进行了几项研究，发现许多水坝在地震条件下是不安全的。存在几种翻新方法，包括通过使用环氧涂层的后张拉电缆来加固大坝。本文提供了一个案例研究，该案例研究了一个64.6米高的双曲率薄坝结构，该结构已通过使用垂直后张拉电缆进行了加固。本文总结了此类大型保水结构的各种实验室，现场，构造和性能研究。此处描述的技术适用于其他受最大可信地震威胁的大坝结构。

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