超高性能混凝土组合钢桥面承载性能试验研究
发布时间：2018-09-05 12:45
【摘要】：为了解超高性能混凝土组合钢桥面在静力作用下的裂缝扩展情况和承载能力,以某长江大桥正交异性钢桥面板构造细节为背景设计试验梁(单U肋),采用有限元分析和模型试验的方法研究超高性能混凝土组合钢桥面在静力加载过程中的裂缝扩展形态和位移、应变的变化规律。结果表明:加载至13%极限荷载时,中横隔板顶面附近观测到裂缝;达到极限荷载时,裂缝最大宽度达0.15mm;超高性能混凝土与钢结构能够协同工作;加载过程中超高性能混凝土的抗裂性能良好,达到极限承载能力时,钢结构先发生屈曲;在设计荷载作用下,超高性能混凝土铺装层能够满足耐久性要求,组合钢桥面具有较大的静力承载能力富余度。
[Abstract]:In order to understand the crack propagation and bearing capacity of composite steel deck of ultra-high performance concrete under static force, Based on the structural details of orthotropic steel bridge slab of a Yangtze River Bridge, the experimental beam (single U rib) was designed. The crack of the steel deck of ultra-high performance concrete composite steel bridge during static loading was studied by means of finite element analysis and model test. Joint expansion pattern and displacement, The variation of strain. The results show that cracks are observed near the top of the mid-transverse diaphragm when the ultimate load is 13%, the maximum width of the crack reaches 0.15 mm when the ultimate load is reached, and the super-high performance concrete and steel structure can work together. The crack resistance of UHPC during loading is good. When the ultimate bearing capacity is reached, the steel structure buckles first, and under the design load, the UHPC pavement can meet the durability requirements. The composite steel deck has a large excess of static bearing capacity.
【作者单位】： 中铁大桥科学研究院有限公司;桥梁结构健康与安全国家重点实验室;
【基金】：中国中铁重大科研课题(重大-24-2011)~~
【分类号】：U446.1
本文编号：2224319
[Abstract]:In order to understand the crack propagation and bearing capacity of composite steel deck of ultra-high performance concrete under static force, Based on the structural details of orthotropic steel bridge slab of a Yangtze River Bridge, the experimental beam (single U rib) was designed. The crack of the steel deck of ultra-high performance concrete composite steel bridge during static loading was studied by means of finite element analysis and model test. Joint expansion pattern and displacement, The variation of strain. The results show that cracks are observed near the top of the mid-transverse diaphragm when the ultimate load is 13%, the maximum width of the crack reaches 0.15 mm when the ultimate load is reached, and the super-high performance concrete and steel structure can work together. The crack resistance of UHPC during loading is good. When the ultimate bearing capacity is reached, the steel structure buckles first, and under the design load, the UHPC pavement can meet the durability requirements. The composite steel deck has a large excess of static bearing capacity.
【作者单位】： 中铁大桥科学研究院有限公司;桥梁结构健康与安全国家重点实验室;
【基金】：中国中铁重大科研课题(重大-24-2011)~~
【分类号】：U446.1
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