不锈钢管海砂混凝土纯弯力学性能研究

发布时间：2018-03-05 14:48

本文选题：不锈钢　切入点：钢管混凝土　出处：《福建农林大学》2017年硕士论文　论文类型：学位论文

【摘要】：不锈钢管海砂混凝土结合了不锈钢和海砂两种材料的优点,既解决了河砂资源短缺、普通钢管混凝土耐久性差的问题,又充分继承了普通钢管混凝土承载力高、强度高、抗震性能优越、耐高温性能突出以及韧性与塑性好等结构优点。目前,国内外关于不锈钢管混凝土纯弯试件的研究主要集中在河砂混凝土和再生混凝土方面,而关于不锈钢管海砂混凝土纯弯力学性能的研究还未曾报道过,也没有可参考的相关规范。但从未来建筑的发展需求来看,不锈钢管海砂混凝土发展与应用具有广阔的前景,因此研究不锈钢管海砂混凝土具有重要的工程意义。本文从试验和理论两方面对不锈钢管海砂混凝土纯弯力学性能进行系统深入的研究分析。本文开展的具体工作有以下几个方面:1、综述了不锈钢管海砂混凝土的发展历程,概括了国内外关于本文相关课题的研究现状,阐明了本文的研究目的和开展的研究内容。2、以截面形式、混凝土类型和剪跨比为主要参数,进行了 24个不锈钢管混凝土纯弯力学试验研究。分析了各试验参数对不锈钢管海砂混凝土的荷载与变形关系曲线、抗弯承载力和抗弯刚度的影响规律。并对比分析了各规范计算的抗弯承载力、初始抗弯刚度和使用阶段抗弯刚度与试验结果的差异。3、基于有限元软件建立了可用于不锈钢管海砂混凝土纯弯作用下的有限元分析模型,有限元模型的计算结果和试验结果吻合良好。4、利用有限元模型对不锈钢管海砂混凝土和普通钢管混凝土进行了工作机理分析和参数分析,明晰了荷载与变形曲线以及不锈(钢管)和核心混凝土之间接触应力的差异以及各参数对其的影响规律。
[Abstract]:The stainless steel tube sea sand concrete combines the advantages of stainless steel and sea sand, which not only solves the problems of the shortage of river sand resources and the poor durability of ordinary concrete filled steel tube, but also inherits the high bearing capacity and high strength of ordinary steel tube concrete. At present, the researches on pure bending specimens of stainless steel tube concrete are mainly focused on river sand concrete and recycled concrete. However, the research on the pure bending mechanical properties of stainless steel tubular sea sand concrete has not been reported, and there are no relevant specifications for reference. However, the development and application of stainless steel tubular sea sand concrete have a broad prospect in view of the development demand of the future building. Therefore, it is of great engineering significance to study the concrete of stainless steel tube sea sand. In this paper, the mechanical properties of pure bending of sea sand concrete made of stainless steel tube are studied and analyzed systematically and deeply from the aspects of experiment and theory. In this paper, the development course of stainless steel tube sea sand concrete is summarized in the following aspects: 1. This paper summarizes the current situation of research on this subject at home and abroad, and clarifies the purpose and content of this paper. The main parameters are section form, concrete type and shear span ratio, and the main parameters are the form of section, the type of concrete and the ratio of shear to span. The pure bending mechanical tests of 24 stainless steel tube concrete tubes were carried out. The relationship curves of load and deformation between the test parameters and the sea sand concrete of stainless steel tubes were analyzed. The influence law of flexural bearing capacity and flexural stiffness is analyzed, and the flexural bearing capacity calculated by each code is compared and analyzed. Based on the difference between the initial bending stiffness and the test results, a finite element analysis model for pure bending of stainless steel tube sea sand concrete was established based on the finite element software. The calculated results of the finite element model are in good agreement with the experimental results. Using the finite element model, the working mechanism analysis and parameter analysis of the stainless steel tube sea sand concrete and the ordinary steel tube concrete are carried out. The load and deformation curves, the difference of contact stress between stainless steel tube and core concrete and the influence of each parameter on it are clarified.
【学位授予单位】：福建农林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528

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