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Analysis of steel-reinforced concrete-filled steel tubular and concrete-filled steel tubular columns under cyclic loading

机译:循环荷载下钢筋混凝土钢管柱和钢管混凝土柱的分析

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摘要

In recent decades, concrete-filled steel tubular (CFST) and steel-reinforced concrete-filled steel tubular (SRCFST) structural members have been widely used in the construction of modern buildings and bridges. However, there is a limited finite element analyses and experiments under cyclic loading. These composite constructions ideally combine the advantages of both steel tube and concrete, namely the speed of construction and high strength. Moreover, they have lighter weight, higher bending stiffness, and better cyclic performance than the reinforced concrete construction. In this respect, a new form of composite column, steel reinforced concrete filled steel tubular column (SRCFST), has been proposed to further enhance load capacity, stiffness and cyclic performance. The new column consists of a steel reinforced concrete inside and a steel tube outside. Therefore, in this study, cyclic performance of two CFST and four SRCFST columns are examined based on review of existing studies and ABAQUS software. Eventually, a holistic comparison in cyclic features of these two types of columns and a parametric study on axial load levels are carried out which results in the higher axial load level, stiffness and deformability in SRCFST columns. Apart from load levels consequences, it is observed that the SRCFST column has a higher stiffness and ductility than those of the CFST column preliminary due to confining effect of steel section inside.
机译:在最近的几十年中,钢管混凝土(CFST)和钢管混凝土(SRCFST)结构构件已广泛用于现代建筑和桥梁的建筑中。然而,在循环载荷下有限的有限元分析和实验。这些复合结构理想地结合了钢管和混凝土的优点,即建造速度和高强度。而且,与钢筋混凝土结构相比,它们具有更轻的重量,更高的弯曲刚度和更好的循环性能。在这方面,已经提出了一种新形式的复合柱,即钢筋混凝土填充钢管柱(SRCFST),以进一步提高承载能力,刚度和循环性能。新的立柱由内部的钢筋混凝土和外部的钢管组成。因此,在本研究中,在回顾现有研究和ABAQUS软件的基础上,研究了两个CFST和四个SRCFST色谱柱的循环性能。最终,对这两种类型的柱的循环特性进行了整体比较,并对轴向载荷水平进行了参数研究,从而导致SRCFST柱具有更高的轴向载荷水平,刚度和可变形性。除了载荷水平的影响外,还可以观察到SRCFST立柱具有比CFST立柱更高的刚度和延性,这是由于内部钢截面的约束作用所致。

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    Mahlouji Javid;

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  • 年度 2013
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