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首页> 外文期刊>Magazine of Concrete Research >Analytical approach to factors affecting long- term tension stiffening
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Analytical approach to factors affecting long- term tension stiffening

机译：影响长期张力刚度的因素的分析方法

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摘要

It is widely accepted that tension stiffening of reinforced concrete reduces in the long term. In the codes of practice, this is accounted for by means of a modification in the empirical parameters to interpolate the average response of the reinforced member between the states I (uncracked) and II (bare steel). This average response is actually the result of the interaction of the different time-dependent mechanisms which develop in the element. In a tension member, the behaviour is mainly influenced by concrete creep and shrinkage and time-dependent bond deterioration. The role played by these processes is still unknown. An analytical approach is developed in this paper in order to understand the influence of such processes in the long-term decay of tension stiffening in tension members. The model is able to explain the experimental response of specimens tested in the literature and the results show the major influence of the time-dependent bond deterioration (bond creep and bond stiffness modification), rather than concrete creep and shrinkage.
机译：长期以来，钢筋混凝土的拉伸刚度降低已被广泛接受。在操作规范中，这是通过修改经验参数来解决的，以在状态I（未断裂）和II（裸钢）之间插补增强构件的平均响应。这种平均响应实际上是元素中不同时间相关机制相互作用的结果。在受拉构件中，其行为主要受混凝土蠕变和收缩以及与时间有关的粘结劣化的影响。这些过程所起的作用仍然未知。本文开发了一种分析方法，以了解此类过程对受拉构件中受拉刚度的长期衰减的影响。该模型能够解释文献中测试的样品的实验响应，结果表明，时间相关的粘结劣化（粘结蠕变和粘结刚度改变）的主要影响，而不是混凝土的蠕变和收缩。

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  • 来源
    《Magazine of Concrete Research》 |2010年第12期|p.869-878|共10页
  • 作者

    C. Zanuy;

  • 作者单位

    Department of Continuum Mechanics and Structures, E.T.S. Inge- nieros de Caminos, Canales y Puertos, Universidad Politecnica de Madrid, Madrid, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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