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OALib Journal期刊
ISSN: 2333-9721
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正交异性钢桥面新型复合铺装结构研究
Keywords: 道路工程,复合桥面铺装,有限元,正交异性钢桥,设计指标
Abstract:
针对正交异性钢桥面存在的主要破坏形式,提出其铺装层相应的4个主要设计指标铺装层表面拉应力、铺装层与钢桥面板层间剪应力、铺装层垂直压应变和铺装层剪应力。利用有限元方法,以铺装层与含加劲肋和纵横隔板的正交异性钢桥面局部梁段作为计算对象,进行有限元分析,分析各个设计指标随铺装过渡层模量和铺装层厚度的变化规律。首次提出以水泥基材料为过渡层、焊钉为剪力连接件和SMA13为表层的新型复合铺装系统,并进行了热相容试验、高温复合车辙试验和复合梁疲劳试验等一系列小型试件试验研究。研究结果表明,增大铺装过渡层模量或适当增加铺装层厚度,有助于降低正交异性钢桥面板的应力和应变,使铺装层总体受力越有利;与传统双层沥青混凝土铺装结构相比,新型复合铺装系统性能更优越。
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