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首页> 外文会议>IABSE Conference: Structural Engineering: Providing Solutionso Global Challenges >Design and Behaviour of Prestressed Ultra-High Performance Concrete Channel Girders Using Local Materials
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Design and Behaviour of Prestressed Ultra-High Performance Concrete Channel Girders Using Local Materials

机译：采用局部材料的预应力超高性能混凝土河道梁的设计与性能

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摘要

Two full-scale prestressed bridge girders were designed, cast, and tested in flexure. The firstrnutilizes non-proprietary ultra-high performance concrete (138 MPa, UHPC) mixture proportionsrndeveloped using materials local to the state of New Mexico, USA. Steel fibres were added to thernUHPC at 1.5% by volume. The second was designed using high performance concrete (66 MPa)rnmixture proportions common to New Mexico bridge design. Through comparative analyses ofrnvaried design parameters including material properties, reduction of section geometry, reducedrnmild steel reinforcement, and the use of high strength steel fibres, this investigation providesrnevidence of the improved strength and ductility characteristics of UHPC and demonstrates therncontribution of steel fibre reinforcement to flexural and tensile capacity. The results will aidrndevelopment of design tools and recommendations for implementation of UHPC into local bridgerndesign.
机译：设计，浇铸和测试了两个全尺寸预应力桥梁大梁，并进行了弯曲测试。第一种使用非专有的超高性能混凝土（138 MPa，UHPC）混合物比例，这种比例是使用美国新墨西哥州当地的材料开发的。将钢纤维以1.5体积％的量加入到theUHPC中。第二种是使用新墨西哥州桥梁设计中常见的高性能混凝土（66 MPa）混合比设计的。通过对各种设计参数的比较分析，包括材料性能，截面几何形状的减小，低碳钢增强材料的减少以及高强度钢纤维的使用，本研究提供了UHPC强度和延展性改善的证据，并证明了钢纤维增强材料对弯曲和弯曲的贡献。拉伸能力。结果将有助于开发设计工具和建议，以将UHPC实施到本地桥梁设计中。

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