结构工程
参数统计
有限元法
屈曲
倾斜角
非线性系统
材料科学
工程类
数学
统计
物理
量子力学
作者
Rabab Allouzi,Awni Abu-Shamah,Amer Alkloub
出处
期刊:Multidiscipline Modeling in Materials and Structures
[Emerald (MCB UP)]
日期:2022-08-04
卷期号:18 (4): 688-707
标识
DOI:10.1108/mmms-05-2022-0079
摘要
Purpose Concrete-filled double-skin tubular (CFDST) columns have been gaining significant attention since these columns proved to be more efficient compared to concrete-filled steel-tubular (CFST) columns. This paper presents a tool to design slender CFDST columns with/without inclination. Design/methodology/approach First, 3D nonlinear finite element (FE) models of twenty-two straight CFDST columns are calibrated and it is found that FE results are in good agreement with the experimental outcomes. This is validated based on available experimental data. Subsequently, a parametric study is conducted by adjusting each calibrated FE model to account for three different angles of inclination. These models are used to quantify the effective length factor of these inclined columns. Findings It is found that FE results are in good agreement with the experimental outcomes. An equation is developed in this paper to calculate the characteristic concrete compressive strength for the design of straight CFDST columns. In addition, an equation is presented for engineering practice to calculate the effective length factor at different inclination angles and slenderness ratios to design CFDST columns. The predicted load capacity compares well with the experimental results of straight columns and FE results of inclined columns. Originality/value Advancement in the structural design procedure is required as a response to the continuous innovations in architectural design. Designers might introduce an inclination in columns in buildings or bridges, and there are no available guidelines to design them.
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