...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>PCI Journal >Long-span hybrid precast concrete bridge girder using ultra-high-performance concrete and normalweight concrete
【24h】

Long-span hybrid precast concrete bridge girder using ultra-high-performance concrete and normalweight concrete

机译：采用超高性能混凝土和普通重量混凝土的大跨度混合预制混凝土桥梁梁

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

Ultra-high-performance concrete (UHPC) is an engineered cementitious material with superior mechanical and durability properties compared with normalweight concrete (NWC). By taking advantage of these enhanced properties, a long-span hybrid girder design using standard girder shapes with UHPC in the end zone regions is proposed. Experimental studies were carried out to investigate the behavior of a UHPC-to-NWC interface with 0.2 in. (5 mm) roughness under shear and flexural loading. The results of the experimental studies were used to calibrate the necessary parameters required for developing a three-dimensional (3-D) finite element analysis (FEA) model for a hybrid girder. Structural performance of a 205 ft (623 m) long, 95 in. (2400 mm) deep Precast Concrete Economical Fabrication Committee standard bulb-tee (PCEF-95) hybrid girder was investigated using 3-D PEA models and compared with a girder designed with NWC. The hybrid girder exhibited better performance in terms of end zone cracking compared with the traditional concrete girder. Significant reduction in shear and end zone reinforcement was achieved in the hybrid girder compared with the NWC girder. The details regarding the feasibility of the proposed hybrid girder concept, the results from the interface tests, and the PEA study are presented in this paper.
机译：超高性能混凝土（UHPC）是一种工程胶结材料，与普通重量混凝土（NWC）相比具有卓越的机械和耐久性能。通过利用这些增强的特性，提出了在端部区域使用UHPC的标准桁架形状的大跨度混合桁架设计。进行了实验研究，以研究在剪切和挠曲载荷下粗糙度为0.2英寸（5毫米）的UHPC-NWC界面的行为。实验研究的结果用于校准开发混合梁的三维（3-D）有限元分析（FEA）模型所需的必要参数。使用3-D PEA模型研究了205英尺（623 m）长，95英寸（2400 mm）深的预制混凝土经济结构委员会标准球泡三通（PCEF-95）混合梁的结构性能，并与设计的梁进行了比较与NWC。与传统的混凝土梁相比，混合梁在端区开裂方面表现出更好的性能。与NWC大梁相比，混合大梁的剪力和端区加固明显减少。本文详细介绍了拟议的混合梁概念的可行性，界面测试的结果以及PEA研究。

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