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Fire performance of bolted connections in laminated veneer lumber

机译：层积单板木材中螺栓连接的防火性能

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摘要

This paper describes an investigation into the fire performance of bolted tensile connections in laminated veneer lumber (LVL) made from radiata pine. The capacity of the bolted connections depends on the embedment strength of the wood and on the yield moment of the bolts. The purpose of the research was to develop a prediction method for the time to failure of the connections when exposed to fire. An experimental investigation was carried out on the axial tensile strength of three types of bolted connections that utilized either wood or steel splice plates. Some specimens were tested at ambient temperatures while similar specimens were tested in fire conditions with a constant applied load. In addition, single-bolted connections were tested under constant elevated temperature conditions to determine the embedment strength of the LVL. Connections with no steel plates, or with steel plates slotted between the timber members, performed better than those with exposed steel. A simplified design approach is proposed, using an extension of the Johansen formulae, such that the embedment strength of the LVL depends on the temperature in the bolt.
机译：本文介绍了由辐射松制成的层压单板木材（LVL）中螺栓拉伸连接的防火性能的研究。螺栓连接的能力取决于木材的嵌入强度以及螺栓的屈服力矩。研究的目的是开发一种预测方法，以预测连接到火时失效的时间。对使用木或钢拼接板的三种类型的螺栓连接的轴向拉伸强度进行了实验研究。一些标本在环境温度下进行测试，而相似的标本在持续施加负载的火灾条件下进行测试。此外，在恒定的高温条件下对单螺栓连接进行了测试，以确定LVL的嵌入强度。在没有钢板的情况下，或在木材构件之间开槽的钢板的连接，其性能要优于裸露的钢板。使用Johansen公式的扩展，提出了一种简化的设计方法，这样LVL的嵌入强度取决于螺栓中的温度。

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  • 来源
    《Fire and materials》 |2009年第5期|223-243|共21页
  • 作者

    P. J. Moss; A. H. Buchanan; M. Fragiacomo; P. H. Lau; T. Chuo;

  • 作者单位

    Department of Civil Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand;

    Department of Civil Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand;

    Department of Architecture and Planning, University of Sassari, Alghero, Italy;

    Arup Fire, Perth, WA, Australia;

    Beca Fire International, Wellington, New Zealand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    timber; bolted connection; fire tests; laminated veneer lumber; embedment strength; charring rate;

    机译：木材;螺栓连接;防火测试;层压单板木材;包埋强度;烧焦率;

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