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Study of formwork pressure of wall under ultra-deep vibration

机译：超深振动下墙体模板压力的研究

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摘要

In order to design vertical formwork, an accurate model to predict the lateral pressure of fresh concrete is needed in construction practice. However, there have been few studies on the lateral pressure of concrete walls subjected to ultra-deep vibration and great differences exist on the determination of form pressures and vibration depth in the current national codes. This paper reports a test of four concrete wall specimens that was carried out to study the effect of ultra-deep vibration on the lateral pressure of fresh concrete and the distribution of lateral pressure at various heights of concrete walls. Based on the vibrating liquefaction and hydrostatic pressure balance theory, a calculation model of the lateral pressure of concrete under ultra-deep vibration is put forward, together with a derived formula for simplified calculation. The predictions of the model are compared with the experimental results, and it is shown that the proposed model is able to explain the experiment observations and predict with reasonable accuracy the lateral pressure in fresh concrete walls subjected to ultra-deep vibration.
机译：为了设计垂直模板，在施工实践中需要一个精确的模型来预测新鲜混凝土的侧向压力。然而，很少有关于混凝土墙的承受超深振动的侧向压力的研究，并且在现行的国家法规中，在确定模板压力和振动深度方面存在很大差异。本文报告了对四个混凝土墙试件的测试，以研究超深振动对新鲜混凝土的侧向压力以及不同高度的混凝土墙体的侧向压力的分布的影响。基于振动液化和静水压力平衡理论，提出了超深振动下混凝土侧压力的计算模型，并推导了简化计算的公式。将模型的预测结果与实验结果进行比较，结果表明所提出的模型能够解释实验观察结果，并能以合理的精度预测新混凝土墙体在超深振动下的侧向压力。

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  • 来源
    《Magazine of Concrete Research》 |2019年第8期|373-384|共12页
  • 作者

    Zhang Wenxue; Chen Ying; Li Yunkai; Huang Jian;

  • 作者单位

    Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China;

    Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China;

    Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China;

    Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China;

  • 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

    fresh concrete; pressure-related properties; vibration;

    机译：新鲜混凝土;压力相关性能;振动;

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