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Seismic Performance of High-Ductile Fiber-Reinforced Concrete Short Columns

机译:高延展岩纤维钢筋混凝土短柱的地震性能

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摘要

This study mainly aims to investigate the effectiveness of high-ductile fiber-reinforced concrete (HDC) as a means to enhance the seismic performance of short columns. Six HDC short columns and one reinforced concrete (RC) short column were designed and tested under lateral cyclic loading. The influence of the material type (concrete or HDC), axial load, stirrup ratio, and shear span ratio on crack patterns, hysteresis behavior, shear strength, deformation capacity, energy dissipation, and stiffness degradation was presented and discussed, respectively. The test results show that the RC short column failed in brittle shear with poor energy dissipation, while using HDC to replace concrete can effectively improve the seismic behavior of the short columns. Compared with the RC short column, the shear strength of HDC specimens was improved by 12.6–30.2%, and the drift ratio and the energy dissipation increases were 56.9–88.5% and 237.7–336.7%, respectively, at the ultimate displacement. Additionally, the prediction model of the shear strength for RC columns based on GB50010-2010 (Chinese code) can be safely adopted to evaluate the shear strength of HDC short columns.
机译:本研究主要旨在探讨高延展岩纤维钢筋混凝土(HDC)作为提高短柱地震性能的手段的效果。在横向循环载荷下设计和测试了六个HDC短柱和一个钢筋混凝土(RC)短柱。提出和讨论了材料类型(混凝土或HDC),轴向载荷,搅拌比和剪切跨度比对裂纹图案,滞后行为,剪切强度,变形容量,能量耗散和刚度降解的影响。试验结果表明,脆性剪切的RC短柱具有较差的能量耗散,同时使用HDC更换混凝土可以有效地提高短柱的地震行为。与RC短柱相比,HDC样本的剪切强度提高了12.6-30.2%,漂移比和能量耗散的增加分别在最终位移下分别为56.9-88.5%和237.7-336.7%。另外,可以安全采用基于GB50010-2010(中文代码)的RC列剪切强度的预测模型来评估HDC短柱的剪切强度。

著录项

  • 作者

    Mingke Deng; Yangxi Zhang;

  • 作者单位
  • 年度 2018
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  • 原文格式 PDF
  • 正文语种 eng
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