...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Construction and Building Materials >Bond-dependent coefficient of glass- and carbon-FRP bars in normal- and high-strength concretes
【24h】

Bond-dependent coefficient of glass- and carbon-FRP bars in normal- and high-strength concretes

机译：中强度和高强度混凝土中玻璃纤维和碳纤维玻璃纤维筋的粘结依赖性系数

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 design of concrete members reinforced with fiber-reinforced-polymer (FRP) bars is typically governed by serviceability state rather than ultimate state. This necessitates verifying the crack width in FRP-reinforced concrete (FRP-RC) members at service load. Recent developments in the FRP industry led to the introduction of FRP bars with different surface configurations and mechanical properties, which are expected to affect their bond performance. In the absence of test data, the design codes and guides, however, recommend bond-dependent coefficient (k(b)) values considering the surface configurations. Thus, this study aims at investigating the kb values and verifying the dependency of the kb values on FRP bar type (glass [GFRP] and carbon [CFRP]), diameter, and concrete type, and strength limited to the first critical flexural-crack width. The investigation included 16 beams measuring 4250 mm long x 200 mm wide x 400 mm deep. The beams were reinforced with sand-coated GFRP bars, helically-grooved GFRP bars, and sand-coated CFRP bars and were fabricated with normal-and high strength concretes (NSC and HSC). The measured first critical-crack widths and measured strains were Used to assess the current k(b) values recommended in FRP design codes and guides. The findings did not support using the same k(b) value for FRP bars of different types (carbon and glass) with similar surface configurations. (C) 2016 Elsevier Ltd. All rights reserved.
机译：用纤维增强聚合物（FRP）钢筋增强的混凝土构件的设计通常取决于使用状态，而不是极限状态。这就需要在使用载荷下验证FRP钢筋混凝土（FRP-RC）构件的裂缝宽度。玻璃钢行业的最新发展导致引入了具有不同表面配置和机械性能的玻璃钢条，预计会影响其粘结性能。但是，在没有测试数据的情况下，设计规范和指南会建议结合表面构造的与粘合有关的系数（k（b））值。因此，本研究旨在调查kb值并验证kb值对FRP钢筋类型（玻璃[GFRP]和碳[CFRP]），直径和混凝土类型以及强度（仅限于第一个临界弯曲裂纹）的依赖性宽度。调查包括16条长4250毫米x宽200毫米x深400毫米的光束。梁用砂包GFRP筋，螺旋槽GFRP筋和砂CFRP筋加固，并用普通和高强度混凝土（NSC和HSC）制成。测量的第一临界裂纹宽度和应变被用于评估FRP设计规范和指南中建议的当前k（b）值。该发现不支持对具有相似表面构造的不同类型（碳和玻璃）的FRP筋使用相同的k（b）值。 （C）2016 Elsevier Ltd.保留所有权利。

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