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首页> 外文会议>International Conference on Composite Construction in Steel and Concrete; 20040718-23; Mpumalanga(ZA) >SHORT- AND LONG-TERM TESTS OF THE STRENGTHENING OF CONCRETE FLOOR PANELS WITH EXTERNAL BONDED REINFORCEMENT
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SHORT- AND LONG-TERM TESTS OF THE STRENGTHENING OF CONCRETE FLOOR PANELS WITH EXTERNAL BONDED REINFORCEMENT

机译：外部粘结钢筋加固混凝土面板的短期和长期测试

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摘要

The paper describes experiments which were made at the Faculty of Civil Engineering of Brno University of Technology. Short- and long-term experiments are dealt with. The short-term experiments serve as a base for design of strengthening. The long-term experiment investigates the influence of time on the strengthened elements and on the changes in their behaviour. The short-term experiment presents series of the tests of concrete specimens, on which distinct lengths of CFRP glued reinforcement were applied. These specimens demonstrate the behaviour of the reinforcing element under tension and the adhesion between individual layers in the reinforcement area. Strains of the reinforcement are recorded together with the mode of failure of the specimens. For the long-term experiments failed RC floor panels were used. The panels were subsequently strengthened with several different types of reinforcement (CFRP strips, carbon and glass fabric). Already reinforced floor panels were stored and exposed to the long-term loading at different levels. Another factor affecting the behaviour of these panels was climatic conditions. The results of the experiments have shown that the deformations and deflections caused by the temperature changes have a reversible character. The evaluation of the measured values is given.
机译：本文介绍了布尔诺工业大学土木工程学院进行的实验。处理短期和长期实验。短期实验是加强设计的基础。长期实验研究了时间对强化元素及其行为变化的影响。短期实验介绍了一系列混凝土试样的测试，在这些试样上应用了不同长度的CFRP胶粘钢筋。这些样品证明了增强元件在张力下的行为以及增强区域中各层之间的附着力。记录钢筋的应变以及样本的破坏模式。对于长期实验，使用了失败的RC地板。随后，用几种不同类型的增强材料（CFRP条，碳纤维和玻璃纤维）对面板进行增强。已存储的加固地板面板已长期处于不同水平的负荷之下。影响这些面板行为的另一个因素是气候条件。实验结果表明，温度变化引起的变形和挠度具有可逆性。给出了测量值的评估。

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