椭圆形钢管混凝土构件纯弯力学性能研究

发布时间：2018-06-16 06:23

本文选题：钢管混凝土 + 椭圆形截面　；参考：《沈阳建筑大学》2013年硕士论文

【摘要】：本文从试验和理论两个方面对椭圆形钢管混凝土力学性能进行了研究与分析,并在试验与理论分析的基础上,结合以往有关矩形、圆形、方形等其它截面形式的钢管混凝土构件力学性能的研究成果,建议了椭圆形钢管混凝土构件的承载力实用计算方法。本文进行了以下几个方面的研究工作：进行了8个纯弯试验研究。分析了剪跨比、外钢管厚度及长轴长度等参数对构件承载能力、延性及破坏形态的影响,并对其力学性能做出评价。在由试验数据确定的材料属性及有限元模型的基础上,利用非线性有限元分析软件ABAQUS,对所进行的试验建立有限元计算模型。将试验研究结果与有限元计算结果进行比较,并对有限元模型进行调整以达到试验结果与有限元分析结果相吻合,使有限元模拟的正确性得证。进而,利用ABAQUS进行更进一步的模拟分析,对影响椭圆形钢管混凝土构件力学性能的参数(如：剪跨比、材料强度、外钢管厚度、长轴长度和短轴长度)进行深入分析。建议了椭圆形钢管混凝土构件的承载力实用计算方法,并利用所建议的承载力计算式对试验和模拟算例的承载力进行计算,结果吻合良好,承载力计算方法的可靠性与实用性得证。
[Abstract]:In this paper, the mechanical properties of elliptical concrete-filled steel tube are studied and analyzed from two aspects of experiment and theory. On the basis of experimental and theoretical analysis, combined with the previous rectangular, circular, Based on the research results of the mechanical properties of concrete filled steel tube members with square and other cross-section the practical calculation method of bearing capacity of elliptical concrete-filled steel tubular members is suggested. In this paper, the following aspects of the research work are carried out: 8 pure bending tests have been carried out. The influence of the shear span ratio, the thickness of outer steel tube and the length of long axis on the bearing capacity, ductility and failure mode of the member is analyzed, and its mechanical properties are evaluated. Based on the material properties and the finite element model determined by the test data, the finite element calculation model is established by using the nonlinear finite element analysis software Abaqus. The experimental results are compared with the results of finite element calculation, and the finite element model is adjusted to achieve a good agreement between the test results and the results of finite element analysis, so that the correctness of the finite element simulation can be verified. Furthermore, the parameters affecting the mechanical properties of elliptical concrete-filled steel tube members (such as shear span ratio, material strength, thickness of outer steel tube, length of long axis and length of short axis) are deeply analyzed by Abaqus. The practical calculation method of bearing capacity of elliptical concrete-filled steel tube members is suggested, and the bearing capacity of test and simulation examples is calculated by using the suggested calculation formula. The results are in good agreement with each other. The reliability and practicability of the calculation method of bearing capacity are proved.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.9

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