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首页> 外文期刊>Engineering Structures >Seismic design of three damage-resistant reinforced concrete shear walls detailed with self-centering reinforcement
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Seismic design of three damage-resistant reinforced concrete shear walls detailed with self-centering reinforcement

机译：采用自定心钢筋详述三种抗损害钢筋混凝土剪力墙的地震设计

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摘要

Recent studies have shown that the innovative shear walls detailed with a type of self-centering reinforcement and fiber reinforced concrete are effective in reducing the permanent displacement and concrete damage compared to conventional concrete (RC) shear walls. However, more investigation is required into the seismic design parameters, such as the inelastic rotational capacity and plastic hinge length of innovative shear walls. This paper investigates the response of three innovative walls cast with fiber-reinforced composites and reinforced with steel rebars and a type of self-centering reinforcement consisting of shape memory alloy (SMA) bars, glass fiber reinforced polymer (GFRP) bars, or high-strength steel strands. The response of each innovative wall is compared to that of a conventional RC shear wall called the control wall. Then, the inelastic rotational capacity, plastic hinge length, and self-centering of the innovative walls are discussed within the framework of the seismic design codes of North America.It is shown that innovative walls can undergo significant inelastic rotational deformations due to the use of ductile reinforcements in their boundary elements SMA bars in the boundaries of steel-SMA reinforced wall and steel rebars in the steel-GFRP and the partially post-tensioned walls. The reinforcement with lower tensile strain capacities, such as PT strands and GFRP bars, were placed away from the boundaries of the steel-GFRP and the partially post-tensioned walls. It is also shown that the crack opening at the base of each innovative wall was greater in comparison to that of the control wall. This was due to the use of fiber-reinforced composites and self-centering reinforcements with low bonding stresses in the walls, which increased the rocking in the response of the innovative walls. It is shown that the plastic hinge in the steel-GFRP reinforced and post-tensioned walls was shorter than in the control wall since plastic strains were more concentration in steel rebars adjacent to the bases of the walls. In the steel-SMA reinforced wall, the plastic hinge length was longer than in the control wall due to the low bonding properties of the SMA bars compared to the control wall. The self-centering capacity of the innovative walls at different seismic performance levels is also discussed, and three improved self-centering objectives for the design of innovative walls are introduced.
机译：最近的研究表明，与传统混凝土（RC）剪切墙相比，采用一种自定心钢筋和纤维钢筋混凝土详述的创新剪力墙有效地降低永久性位移和混凝土损坏。然而，需要更多的调查来进入地震设计参数，例如创新剪力墙的无弹性旋转容量和塑料铰链长度。本文调查了三个创新墙体铸造的抗纤维复合材料的响应，并用钢钢筋和一种由形状记忆合金（SMA）棒，玻璃纤维增​​强聚合物（GFRP）棒或高玻璃纤维增​​强聚合物（GFRP）组成的自定心钢筋。强度钢绞线。将每个创新墙的响应与传统的RC剪切壁相比，称为控制壁。然后，在北美地震设计码的框架内讨论了非弹性旋转容量，塑料铰链长度和自定向墙体的框架内讨论了北美地震设计码的框架内。图示，由于使用，创新的墙壁可能会发生显着的无弹性旋转变形钢 - SMA加强墙和钢钢筋边界中的边界元素SMA条中的延展性增强钢 - GFRP和部分后柱墙壁。具有较低拉伸应变容量的加强件，例如Pt股和GFRP棒，远离钢-GFRP的边界和部分后柱壁。还示出了与控制壁的底座的裂缝开口更大。这是由于玻璃纤维增​​强复合材料和壁中具有低粘合应力的自定心增强材料，这增加了创新墙壁的响应中的摇摆。结果表明，钢-GFRP增强和后张紧壁中的塑料铰链比对照壁短短，因为塑料菌株在墙壁底座附近的钢钢筋中更浓度。在钢 - SMA加强壁中，由于与控制壁相比，由于SMA条的低键合性能，塑料铰链长度比控制壁更长。还讨论了在不同地震性能水平下创新墙壁的自定心能力，并介绍了三种改进的创新墙体设计的自定心目标。

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  • 来源
    《Engineering Structures》 |2020年第may15期|110277.1-110277.15|共15页
  • 作者

    Kian Mohammad J. Tolou; Cruz-Noguez Carlos A.;

  • 作者单位

    Univ Alberta Dept Civil & Environm Engn Edmonton AB Canada;

    Univ Alberta Dept Civil & Environm Engn Edmonton AB Canada;

  • 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
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