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Cyclic testing of low-strength plain concrete

机译:低强度普通混凝土的循环测试

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摘要

This study investigates the cyclic performance of low-strength plain concrete (LSPC) between 5 MPa and 10 MPa. In highly seismic regions, deficient reinforced concrete (RC) structures have low concrete strength and the seismic evaluation of such RC structures depends on knowledge of the stress-strain relation of confined and unconfined concrete. An experimental study was thus undertaken to determine the mechanical properties of LSPC. The test results indicate that the axial strain of LSPC at peak stress varied between 0.0025 and 0.0055 with respect to concrete strength and aggregate type. Furthermore, it was observed that the cyclic behaviour of LSPC cannot be simulated with a well-known model proposed in the literature. The model predicted the cyclic behaviour of LSPC in terms of residual strain and elastic modulus with a high error. In addition, the modulus of LSPC was not predicted by equations defined in the code. Finally, it was observed that the cyclic behaviours of LSPC significantly depend on the characteristics of the aggregate.
机译:本研究调查了5 MPa至10 MPa之间的低强度普通混凝土(LSPC)的循环性能。在高地震地区,不足的钢筋混凝土(RC)结构的混凝土强度低,这种RC结构的抗震性评估取决于对承压和非承压混凝土的应力-应变关系的了解。因此进行了实验研究以确定LSPC的机械性能。测试结果表明,LSPC在峰值应力下的轴向应变相对于混凝土强度和骨料类型在0.0025至0.0055之间变化。此外,已经观察到,LSPC的循环行为无法用文献中提出的众所周知的模型来模拟。该模型根据残余应变和弹性模量预测了LSPC的循环行为,具有很高的误差。另外,LSPC的模量不是由代码中定义的方程式预测的。最后,观察到LSPC的循环行为显着取决于聚集体的特征。

著录项

  • 来源
    《Magazine of Concrete Research》 |2015年第8期|379-390|共12页
  • 作者

    Ozcelik Ramazan;

  • 作者单位

    Akdeniz Univ, Dept Civil Engn, TR-07058 Antalya, Turkey;

  • 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

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