• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Flexural behavior of hybrid concrete-filled fiber reinforced polymer tube columns
【24h】

Flexural behavior of hybrid concrete-filled fiber reinforced polymer tube columns

机译：混杂混凝土纤维增强聚合物管柱的抗弯性能

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

The concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) system has been widely studied as a durable alternative design for bridge columns. Research has shown that utilizing a small number of longitudinal steel bars in the concrete core provides the energy dissipation characteristics required for resisting extreme loads, such as seismic and blast. However, the construction complexity associated with the addition of rebar discourages the implementation of this system. In a novel approach, this study proposes and investigates the structural performance of CFFTs with a hybrid glass/steel fiber reinforced tube. This hybrid CFFT (HCFFT) system integrates the required longitudinal steel reinforcement into the FRP shell in the form of 30-mu m fibers. This study details the experimental results from two CFFT and four HCFFT circular specimens tested under half-cyclic four-point bending. The effect of concrete slippage inside the tube was investigated. The flexural capacity, residual deformation, damage, and energy absorption capacity were experimentally evaluated. The HCFFT specimens exhibited higher energy absorption and lower degradations in stiffness compared to the CFFTs at comparable flexural deformations. Moment-curvature analysis was used to quantify the contribution of the concrete core when it is allowed to slide inside the tube.
机译：填充混凝土的纤维增强聚合物（FRP）管（CFFT）系统已被广泛研究作为桥柱的耐用替代设计。研究表明，在混凝土芯中使用少量纵向钢筋可提供抵抗极端载荷（例如地震和爆炸）所需的能量耗散特性。然而，与添加钢筋相关的构造复杂性阻碍了该系统的实施。本研究以一种新颖的方法提出并研究了玻璃/钢纤维混合管的CFFT的结构性能。这种混合CFFT（HCFFT）系统将所需的纵向钢筋加固以30微米的纤维形式集成到FRP外壳中。这项研究详细介绍了在半循环四点弯曲下测试的两个CFFT和四个HCFFT圆形样品的实验结果。研究了管内混凝土滑移的影响。实验评估了挠曲能力，残余变形，破坏和能量吸收能力。在相当的挠曲变形下，与CFFT相比，HCFFT样品显示出更高的能量吸收和更低的刚度降低。弯矩分析用于量化混凝土芯在管内滑动时的贡献。

著录项

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