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Limits to the strength design of reinforced concrete shells and slabs

机译：限制钢筋混凝土壳和板的强度设计

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摘要

One of the most important works in the ultimate limit state design of reinforced concrete plates or shells subjected to flexure and membrane actions is the one provided by Brondum-Nielsen (1974). Therein, the author divides the shell element into three layers; the outer layers withstand a state of membrane forces located on their middle surfaces. The forces at the centroid of the reinforcement, in both directions, have been obtained from equilibrium, and the steel area needed is computed by dividing these tension forces by the steel yield stress,ƒ_y. An extension to the strain plane hypothesis widely used in the strength design of RC beams and columns is presented, aiming at RC strength design of shells and slabs. As a result, limits to the application of the Bromdum-Nielsen procedure are given in this work since it cannot always be guaranteed that the stress in the steel is f_y as the original method proposes. A new method based on the computation of the balance point in the beam flexure design is developed to check the limits of application of Brondum-Nielsen's approach. The Upper Bound Theorem of plasticity guaranties that the obtained forces are on the safe side. Examples are provided.
机译：Brondum-Nielsen（1974）提供的一项在钢筋混凝土板或壳体受弯曲和膜作用的极限状态设计中最重要的工作之一。在本文中，作者将外壳元素分为三层：外层承受位于其中间表面的膜力状态。钢筋的质心在两个方向上的力都是通过平衡获得的，所需的钢面积通过将这些拉力除以钢的屈服应力ƒ_y来计算。提出了一种在钢筋混凝土梁和柱的强度设计中广泛使用的应变平面假说的扩展，旨在进行壳和平板的钢筋混凝土强度设计。结果，在这项工作中限制了Bromdum-Nielsen程序的应用，因为不能总是保证钢中的应力为原始方法所建议的f_y。开发了一种基于梁弯曲设计中平衡点计算的新方法，以检查Brondum-Nielsen方法的应用范围。可塑性的上限定理保证所获得的力在安全侧。提供示例。

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  • 来源
    《Engineering Structures》 |2014年第3期|184-194|共11页
  • 作者

    Enrique Hernandez-Montes; Juan F. Carbonell-Marquez; Luisa M. Gil-Martin;

  • 作者单位

    Department of Structural Mechanics, University of Granada (UGR), Campus Universitario de Fuentenueva s, 18072 Granada, Spain;

    Department of Structural Mechanics, University of Granada (UGR), Campus Universitario de Fuentenueva s, 18072 Granada, Spain;

    Department of Structural Mechanics, University of Granada (UGR), Campus Universitario de Fuentenueva s, 18072 Granada, 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
  • 中图分类
  • 关键词

    Reinforced concrete; Shell; Slab; Optimization; Balance point;

    机译：钢筋混凝土;贝壳;板优化;平衡点;

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