• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Evaluation of crack-bridging strength degradation in SFRC structural beams under flexural fatigue
【24h】

Evaluation of crack-bridging strength degradation in SFRC structural beams under flexural fatigue

机译：弯曲疲劳下SFRC结构梁裂纹桥接强度降解的评价

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

Steel fiber reinforced concrete (SFRC) at the structural scale exhibits an enhanced fatigue performance compared to conventional reinforced concrete (RC) with lower stress levels and longer fatigue life. The steel fibers contribute to the crack-bridging strength of the concrete, but how this degrades in the tensile stress zone of an SFRC structural beam during flexural cyclic loading remains unknown. This makes the fatigue design and safety verification of SFRC beams an unexplored area. In this work, the degradation in crack-bridging strength of SFRC structural beams with 1.5% by volume of hooked-end steel fibers under different flexural fatigue stress levels is evaluated over the fatigue life using an inverse analysis method. The experimental flexural response is monitored during static and fatigue tests, and compared with the calculated one from the section analysis calculations through the execution of the inverse analysis method. Based on the results, the crack-bridging strength is shown to degrade gradually at different flexural fatigue stress levels over the fatigue life. Further, the residual flexural capacity at the end of fatigue life is shown to be little different from the original capacity obtained in static loading when the flexural fatigue stress level is low.
机译：与常规钢筋混凝土（RC）相比，钢纤维增强混凝土（SFRC）具有增强的疲劳性能，其应力水平降低，疲劳寿命更长。钢纤维有助于混凝土的裂缝桥接强度，但是如何在弯曲环状载荷期间在SFRC结构梁的拉伸应力区的抗拉应力区中仍然未知。这使得SFRC光束的疲劳设计和安全验证是未开发的区域。在这项工作中，在不同的弯曲疲劳应力水平下，在不同弯曲疲劳应力水平下，在不同弯曲疲劳应力水平下，在不同的弯曲疲劳应力水平下，在不同的弯曲疲劳钢纤维中的裂缝桥接强度的降解进行评估。在静态和疲劳试验期间监测实验弯曲响应，并通过执行逆分析方法与从截面分析计算的计算的一个相比。基于该结果，裂缝桥接强度显示出在疲劳寿命的不同弯曲疲劳应力水平下逐渐降解。此外，当弯曲疲劳应力水平低时，疲劳寿命结束时结束时疲劳寿命结束的抗弯曲能力与静载荷中获得的原始容量很小。

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