聚氨酯—钢板夹层结构正交异性桥面板弯曲及稳定性能试验研究
发布时间：2018-08-01 08:17
【摘要】：聚氨酯-钢板夹层结构桥面板是在两层钢板之间注入聚氨酯核芯，由弹性体芯材与钢板内表层牢固粘接而形成复合结构。现已在国外用于新铺桥面板、桥面板的更换与桥面板的修复加固等应用中。目前由于这种聚氨酯-钢板夹层结构桥面板尚未在国内应用，并且无相应的设计规范及准则，为此本文以模型试验为基础，进行聚氨酯-钢板夹层结构桥面板弯曲受力及稳定极限承载力性能研究，进一步揭示聚氨酯-钢板夹层结构桥面板的一些特点，为聚氨酯-钢夹层结构技术在国内的应用提供可靠的依据。 首先，本文以现有分析理论为基础，重点介绍了夹层板的受力分析及稳定分析理论。同时作为对比和参考，介绍了普通正交异性钢桥面板的受力分析及稳定分析理论。在此基础上，对聚氨酯-钢板夹层结构正交异性钢桥面板的受力性能进行研究。 其次，依据现有的一些工程实例构造进行取值，根据模型相似原理进行了试验方案的设计，并制作试验模型，进行试验研究。并将试验值与有限元计算值进行对比分析，得到聚氨酯-钢板夹层结构正交异性钢桥面板的弯曲受力性能，有限元分析结果与试验值比较吻合。 再次，在对模型进行一般的弯曲性能试验的基础上，进行了模型失稳极限承载力的试验研究，得出了模型在轴向压力和车轮均布荷载作用下的稳定极限承载力，其结果与采用弧长法计算的有限元分析结果较为接近。试验结果表明聚氨酯-钢板夹层结构正交异性钢桥面板的整体稳定性较好，在轴向荷载作用下，桥面板的U肋首先出现了屈曲现象。 最后，，研究了聚氨酯-钢板夹层结构正交异性钢桥面板在参数变化下的稳定极限承载力性能。主要考虑了以下几个影响因素：夹层板钢板厚度的影响、夹层板芯层厚度的影响以及U肋数量的影响。借助有限元软件对这些影响因素进行分析，主要研究了在各参数变化情况下的屈曲模态以及失稳极限荷载。对计算结果进行了对比分析，得到了不同参数对聚氨酯-钢板夹层结构正交异性钢桥面板稳定极限承载力的影响程度。 总之，本文在聚氨酯-钢板夹层结构正交异性钢桥面板体系的结构设计、一般受力性能以及稳定极限承载力方面所做的研究工作，对我国聚氨酯-钢板夹层结构桥面板体系的设计和研究具有一定的参考意义。
[Abstract]:Polyurethane-steel sandwich structure bridge deck is a composite structure formed by solid bonding of elastomer core and inner surface layer of steel plate by injecting polyurethane core between two layers of steel plate. It has been used in the application of new deck, replacement of deck and repair and reinforcement of deck. Because this kind of polyurethane steel plate sandwich structure bridge deck is not yet used in our country, and there is no corresponding design code and criterion, this paper is based on the model test. The bending force and ultimate bearing capacity of polyurethane steel plate sandwich structure bridge deck were studied, and some characteristics of polyurethane steel plate sandwich structure bridge deck plate were revealed. It provides a reliable basis for the application of polyurethane-steel sandwich structure technology in China. Firstly, based on the existing analysis theory, the stress analysis and stability analysis theory of sandwich plate are introduced. At the same time, as a comparison and reference, the stress analysis and stability analysis theory of orthotropic steel bridge slabs are introduced. On this basis, the mechanical properties of orthotropic steel bridge panels with polyurethane-steel sandwich structure are studied. Secondly, according to some existing engineering examples, the test scheme is designed according to the similarity principle of the model, and the test model is made, and the experimental research is carried out. The bending behavior of orthotropic steel bridge panel with polyurethane steel plate sandwich structure is obtained by comparing the experimental results with the calculated values of finite element method. The results of finite element analysis are in good agreement with the experimental values. Thirdly, on the basis of the general bending performance test of the model, the ultimate bearing capacity of the model is studied, and the stability ultimate bearing capacity of the model under axial pressure and uniform wheel load is obtained. The results are close to the results of finite element analysis calculated by arc length method. The experimental results show that the overall stability of the orthotropic steel bridge slab with polyurethane steel sandwich structure is good. Under axial load, the U-rib of the deck slab first appears buckling phenomenon. Finally, the stability ultimate bearing capacity of orthotropic steel bridge panels with polyurethane-steel sandwich structure is studied. The following factors are considered: the thickness of sandwich plate, the thickness of core layer and the number of U ribs. With the help of finite element software, the buckling modes and the buckling limit loads under the varying parameters are studied. The calculation results are compared and analyzed, and the influence of different parameters on the ultimate bearing capacity of orthotropic steel bridge slab with polyurethane steel plate sandwich structure is obtained. In a word, this paper studies the structural design, general mechanical properties and ultimate bearing capacity of orthotropic steel bridge panel system with polyurethane steel plate sandwich structure. It has certain reference significance for the design and research of the bridge deck system of polyurethane-steel sandwich structure in China.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.31
本文编号：2156925
[Abstract]:Polyurethane-steel sandwich structure bridge deck is a composite structure formed by solid bonding of elastomer core and inner surface layer of steel plate by injecting polyurethane core between two layers of steel plate. It has been used in the application of new deck, replacement of deck and repair and reinforcement of deck. Because this kind of polyurethane steel plate sandwich structure bridge deck is not yet used in our country, and there is no corresponding design code and criterion, this paper is based on the model test. The bending force and ultimate bearing capacity of polyurethane steel plate sandwich structure bridge deck were studied, and some characteristics of polyurethane steel plate sandwich structure bridge deck plate were revealed. It provides a reliable basis for the application of polyurethane-steel sandwich structure technology in China. Firstly, based on the existing analysis theory, the stress analysis and stability analysis theory of sandwich plate are introduced. At the same time, as a comparison and reference, the stress analysis and stability analysis theory of orthotropic steel bridge slabs are introduced. On this basis, the mechanical properties of orthotropic steel bridge panels with polyurethane-steel sandwich structure are studied. Secondly, according to some existing engineering examples, the test scheme is designed according to the similarity principle of the model, and the test model is made, and the experimental research is carried out. The bending behavior of orthotropic steel bridge panel with polyurethane steel plate sandwich structure is obtained by comparing the experimental results with the calculated values of finite element method. The results of finite element analysis are in good agreement with the experimental values. Thirdly, on the basis of the general bending performance test of the model, the ultimate bearing capacity of the model is studied, and the stability ultimate bearing capacity of the model under axial pressure and uniform wheel load is obtained. The results are close to the results of finite element analysis calculated by arc length method. The experimental results show that the overall stability of the orthotropic steel bridge slab with polyurethane steel sandwich structure is good. Under axial load, the U-rib of the deck slab first appears buckling phenomenon. Finally, the stability ultimate bearing capacity of orthotropic steel bridge panels with polyurethane-steel sandwich structure is studied. The following factors are considered: the thickness of sandwich plate, the thickness of core layer and the number of U ribs. With the help of finite element software, the buckling modes and the buckling limit loads under the varying parameters are studied. The calculation results are compared and analyzed, and the influence of different parameters on the ultimate bearing capacity of orthotropic steel bridge slab with polyurethane steel plate sandwich structure is obtained. In a word, this paper studies the structural design, general mechanical properties and ultimate bearing capacity of orthotropic steel bridge panel system with polyurethane steel plate sandwich structure. It has certain reference significance for the design and research of the bridge deck system of polyurethane-steel sandwich structure in China.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.31
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