钢板加固钢筋混凝土异形柱承载力数值模拟研究

发布时间：2018-08-22 11:22

【摘要】：钢板加固钢筋混凝土异形截面柱是由钢板和钢筋混凝土异形柱两部分组成的新型加固构件。异形柱是目前较为流行的一种柱体形式,并且广泛的应用于新型的建筑物中,钢板加固又是非常传统的加固方法。钢板和异形柱相互结合,充分的发挥了各自的优点。钢板通过加固受拉区混凝土柱,改善混凝土受力性能,提高构件承载能力,增强其抗震性能。相对而言,对钢筋混凝土异形截面柱力学性能的研究还很匮乏。本文将对钢筋混凝土异形截面柱建立有限元模型。作为加固混凝土异形截面柱子形式的一种,需研究钢板与受拉区混凝土之间的相互协同工作的效果。钢板加固钢筋混凝土异形截面柱力学性能研究,在此前没有相关试验和有限元模拟的研究,故本文所研究和阐述的是钢筋混凝土异形截面柱力学性能比较基本的力学性能,本文的主要研究工作包括:1.对钢筋混凝土异形截面柱进行截面形式设计。2.通过ABAUS建立钢筋混凝土异形截面柱有限元模型,并对该种模型的正确性加以验证,用该种模型进行偏压作用下的数值模拟。3.讨论研究拟定参数对构件力学性能的影响。通过改变偏心距、钢板厚度、配筋率、混凝土强度四个因素的方法,得到该加固形式对异形柱的承载力变化规律。4.基于ABAQUS分析的结果,最终确定偏心距、钢板厚度、配筋率、混凝土强度四个因素,对钢板加固钢筋混凝土异形截面柱力学性能研究偏心受压的极限承载力的影响规律。5.确定合理的偏心距、钢板厚度、配筋率、混凝土强度,提出工程设计建议。
[Abstract]:Reinforced concrete special-section column strengthened by steel plate is a new type of reinforcement member composed of steel plate and reinforced concrete special-shaped column. Special-shaped column is a popular column form, and widely used in new buildings, steel plate reinforcement is a very traditional reinforcement method. Steel plate and special-shaped column combine each other to give full play to their respective advantages. By strengthening concrete columns in tension zone, steel plate can improve the mechanical behavior of concrete, increase the bearing capacity of members and enhance its seismic performance. Relatively speaking, the study on the mechanical properties of reinforced concrete special-section columns is still very scarce. In this paper, the finite element model of reinforced concrete special-section columns is established. As a kind of reinforced concrete column with special-shaped section, the effect of synergistic work between steel plate and concrete in tensile area should be studied. The mechanical properties of reinforced concrete special-section columns strengthened by steel plates have not been studied by relevant tests and finite element simulation before, so the basic mechanical properties of reinforced concrete special-shaped cross-section columns are studied and elaborated in this paper. The main research work of this paper includes: 1. Section design of reinforced concrete special-section column. The finite element model of reinforced concrete special-section column is established by ABAUS, and the correctness of the model is verified. The influence of the parameters on the mechanical properties of the components is discussed. By changing the eccentricity, the thickness of steel plate, the ratio of reinforcement and the strength of concrete, the change law of bearing capacity of this reinforcement form on special-shaped columns is obtained. Based on the results of ABAQUS analysis, four factors such as eccentricity, thickness of steel plate, reinforcement ratio and strength of concrete are determined. The effect of eccentric compression on the ultimate bearing capacity of reinforced concrete special-section columns strengthened by steel plate is studied. Reasonable eccentricity, steel plate thickness, reinforcement ratio and concrete strength are determined, and engineering design suggestions are put forward.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU375.3
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本文编号：2196953