...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Magazine of Concrete Research >Recommendations for shotcrete on rock subjected to blasting vibrations, based on finite element dynamic analysis
【24h】

Recommendations for shotcrete on rock subjected to blasting vibrations, based on finite element dynamic analysis

机译：基于爆破振动的岩石上喷射混凝土的建议，基于有限元动力分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Shotcrete is sprayed concrete applied pneumatically on, for example, a rock surface to prevent fallout of rock blocks and thereby securing the arch-shape of a tunnel profile. A finite element model, especially adapted to the dynamic analysis of shotcrete on rock that is subjected to vibrations from blasting, has been developed and tested. The model consists of spring and beam elements that are used to simulate the behaviour of an elastic concrete area, bound to a rock surface through adhesion. This facilitates the calculation of a two-dimensional displacement field, using mode superposition and Duhamel's integral. The loads applied on the model are accelerations that give rise to inertia forces on the system. The accelerations are calculated from given weights of explosives, geometrical conditions and rock properties. The presented numerical examples demonstrate the response of shotcrete to vibrations, based on material data from an extensive literature survey. A series of calculations are compiled to give recommendations for how close to shotcrete blasting in rock can be allowed.
机译：喷射混凝土是通过气动方式喷涂在例如岩石表面上的喷射混凝土，以防止岩石块脱落，从而确保隧道轮廓的拱形。已经开发并测试了一种有限元模型，该模型特别适用于经受爆破振动的岩石上喷射混凝土的动态分析。该模型由弹簧和梁单元组成，用于模拟通过粘附力绑定到岩石表面的弹性混凝土区域的行为。使用模式叠加和Duhamel积分，这有助于二维位移场的计算。模型上施加的负载是加速度，该加速度会引起系统的惯性力。根据给定的炸药重量，几何条件和岩石特性计算加速度。所提供的数值示例基于大量文献调查中的材料数据，证明了喷射混凝土对振动的响应。汇编了一系列计算结果，为岩石中允许的喷射混凝土爆破提供了建议。

著录项

  • 来源
    《Magazine of Concrete Research》 |2005年第3期|p.123-133|共11页
  • 作者

    A. Ansell;

  • 作者单位

    Department of Civil and Architectural Engineering, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden;

  • 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 水泥工业;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号