基于栓钉连接的ECC钢桥面铺装结构界面特性分析

发布时间：2018-03-24 07:34

本文选题：钢桥面铺装　切入点：早强ECC　出处：《东南大学》2015年硕士论文

【摘要】：日益增加的交通量对我国道路的铺装质量提出了越来越高的要求,而钢桥面铺装对材料的要求更为严格。除了要求具备一般的路用性能之外,还要求能够实现与钢板之间的协同变形,具有与钢桥面板良好的连接性能,这也是铺装材料研究中的重点和难点。现阶段的钢桥面铺装主要以沥青混合料为主,其中以环氧沥青混凝土性能最佳,但其成本较高,施工复杂。研究证明,只有从铺装材料和铺装结构上进行技术创新,才有可能使钢桥面铺装产生质的进步。本文采用高延性水泥基复合材料(ECC)作为钢桥面铺装的一层,并采用栓钉连接。首先,本文总结国内外现阶段常用钢桥面铺装结构的性能特点及铺装病害形式,提出将ECC(高延性水泥基复合)材料应用于钢桥面铺装,又在总结钢—混凝土组合结构中常用连接方式的基础上提出了“基于栓钉连接的早强型ECC—钢桥面铺装”结构。其次,本文通过ECC材料的自愈合性能作为主要的衡量指标,通过控制变量的方法,对ECC配合比中采用的水泥及粉煤灰种类进行优选。同时,通过渗水试验验证了裂缝宽度越小材料的抗渗性能恢复越快。再次,本文由普通混凝土、砂浆和两种延性不同的ECC材料的推出试验发现抗压强度对ECC—H型钢组合结构界面承载力影响不大,破坏模式、ECC延性等有较大影响。最后,本文通过推出试验证明相比环氧粘结剂,栓钉连接具有较好的温度敏感性能,且本文中利用ABAQUS有限元软件建立了推出试验模型,对钢桥面铺装结构中普通混凝土—钢组合界面的模拟效果较好。
[Abstract]:The increasing traffic volume puts forward higher and higher requirements for the pavement quality of roads in our country, while the steel bridge deck pavement requires more strict requirements for materials. In addition to the general road performance requirements, It is also required to realize the cooperative deformation with steel plate and have good connection performance with steel bridge panel, which is also the key and difficult point in the research of pavement materials. At present, the main pavement of steel bridge deck is asphalt mixture. Among them, epoxy asphalt concrete has the best performance, but its cost is high and the construction is complicated. In this paper, the high ductile cement matrix composite material (Ecc) is used as the first layer of steel bridge deck pavement, and the steel bridge deck pavement is connected with bolt. This paper summarizes the performance characteristics and pavement disease forms of steel bridge deck pavement structure commonly used at home and abroad at present, and puts forward the application of Ecc (high ductile cement based composite) material to steel bridge deck pavement. On the basis of summing up the common connection methods of steel-concrete composite structures, the "early-strength ECC-steel bridge deck pavement" structure based on bolt connection is put forward. Secondly, the self-healing performance of ECC material is taken as the main measurement index. Through the method of controlling variables, the kinds of cement and fly ash used in ECC mixture ratio are selected. Meanwhile, the seepage test proves that the anti-seepage performance of the material with smaller crack width is recovered faster. Thirdly, the common concrete is used in this paper. The test of mortar and two kinds of ECC materials with different ductility shows that the compressive strength has little effect on the interfacial bearing capacity of ECC-H steel composite structure, and the failure mode has great influence on the ductility of ECC-H composite structure. Finally, this paper proves that compared with epoxy binder, the compressive strength has great influence on the ductility of ECC-H steel composite structure. In this paper, the ABAQUS finite element software is used to establish the test model, which can simulate the common concrete-steel composite interface in the steel bridge deck pavement structure.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.33

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