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Modelling strain penetration effects in RC walls with smooth steel bars

机译:用光滑的钢筋模拟RC墙中的应变穿透效应

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摘要

Reinforced-concrete (RC) dual wall-frame structures comprise an important proportion of the building stock in some European cities. However, many were constructed without seismic provisions and it is therefore important to assess their ability to withstand seismic events and to define strategies to reduce their potential vulnerability. This work focuses on the numerical simulation of the seismic behaviour of RC walls making use of fibre-based non-linear beam elements. Even though it is common to assume perfect bond between reinforcing bars and concrete, the relative bond-slip deformations between the two materials can contribute up to 40% of the total lateral deformation of columns when ribbed rebars are used and up to 90% in the case of smooth rebars. The aim of this paper is to provide a contribution towards understanding the importance of these effects in old RC walls and to provide indications regarding the use of a simplified bond-slip model.
机译:钢筋混凝土(RC)双壁框架结构在一些欧洲城市中占建筑存量的重要比例。但是,许多建筑物的建造没有地震规定,因此评估它们承受地震事件的能力并确定降低其潜在脆弱性的策略非常重要。这项工作着重于利用基于纤维的非线性梁单元对RC墙的抗震性能进行数值模拟。尽管通常假定钢筋和混凝土之间具有完美的粘结,但是当使用带肋钢筋时,两种材料之间的相对粘结-滑移变形可占柱总横向变形的40%,而在钢筋混凝土中则占90%。光滑的钢筋情况。本文的目的是为理解这些效应在旧钢筋混凝土墙中的重要性做出贡献,并为使用简化的粘结滑移模型提供指示。

著录项

  • 来源
    《Magazine of Concrete Research》 |2019年第18期|894-906|共13页
  • 作者单位

    Univ Lisbon, Inst Super Tecn, Dept Civil Engn Architecture & Georesources, CERIS, Lisbon, Portugal;

    Univ Lisbon, Inst Super Tecn, Dept Civil Engn Architecture & Georesources, CERIS, Lisbon, Portugal;

    Natl Lab Civil Engn LNEC, Lisbon, Portugal;

    Natl Lab Civil Engn LNEC, Lisbon, Portugal;

  • 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

    anchors anchorages; bond; modelling;

    机译:锚和锚地;债券;建模;

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