超高性能混凝土装配式道路板承载特性研究及工程应用  

Research on the Bearing Characteristics and Engineering Application of Ultra-High Performance Concrete Prefabricated Road Slabs

作　　者：罗磊 尹新龙[2] 于磊 杨智诚 杨永民 LUO Lei;YIN Xin-long;YU Lei;YANG Zhi-cheng;YANG Yong-min(Guangdong Keyuan Engineering Supervision Consulting Co.,Ltd.,Guangzhou 510170,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;College of Urban and Rural Construction,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;Institute of Sustainable Building and Energy Conservation,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China)

机构地区：[1]广东省科源工程监理咨询有限公司,广州510170 [2]广东省水利水电科学研究院,广州510635 [3]仲恺农业工程学院城乡建设学院,广州510225 [4]仲恺农业工程学院可持续建筑与节能研究所,广州510225

出　　处：《广东水利电力职业技术学院学报》2024年第2期5-8,13,共5页Journal of Guangdong Polytechnic of Water Resources and Electric Engineering

基　　金：广东省自然科学基金面上项目(2022A1515010853);广东省住建厅科技项目(2023-K49-103119)。

摘　　要：装配式道路板在各类工程均具良好应用前景。为此根据超高性能混凝土(UHPC)材料特性制备了UHPC装配式道路板,对其承载特性开展研究并在实际工程中进行应用验证。结果表明,制备的UHPC装配式道路板在承载力试验中,加载至120 kN前未见明显裂缝,直至360 kN,裂缝宽度激增,挠度增速加快,其破坏极限为368 kN。道路板明显裂缝产生于150kN,此时受拉区混凝土依然工作;荷载超过360 kN后细裂缝形成底贯通裂缝,荷载施加处以及板侧处裂缝达到1.0 mm以上。道路板受压区混凝土在荷载0 kN到120 kN混凝土应变的增幅明显小于后期混凝土应变,且板中部荷载混凝土一直处于弹性应变中,直到预制板破坏。道路板显示出优异的承载能力,在实际工程应用中效果良好。Prefabricated road slabs have promising applications in various types of engineering.This study prepared Ultra-High Performance Concrete(UHPC)prefabricated road slabs based on the characteristics of UHPC materials,and conducted research on the bearing characteristics of road slabs with validation through practical engineering applications.The results show that the prepared UHPC prefabricated road slabs exhibited no apparent cracks during the bearing capacity test up to 120kN.However,cracks started to appear significantly and the deflection increased rapidly when the load reached 360kN,with the ultimate failure occurring at 368kN.Cracks in the road slabs became evident at 150kN,although the concrete in the tension zone continued to function.Beyond 360kN,fine cracks developed,leading to bottom-through cracks,with cracks at the load application point and the sides of the panel exceeding 1.0 mm.The increase in concrete strain in the compression zone of the road slabs from 0kN to 120kN was significantly smaller than the later-stage concrete strain,and the concrete in the middle of the slab remained in elastic strain until the prefabricated slab failed.The road slabs demonstrated excellent load-bearing capacity,and their performance in practical engineering applications was satisfactory.

关 键 词：超高性能混凝土 装配式道路版 承载特性 

分 类 号：TU528[建筑科学—建筑技术科学]