Computational modeling and simulations for predicting the nonlinear responses of reinforced concrete beams

IF 1.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Multidiscipline Modeling in Materials and Structures Pub Date : 2023-05-22 DOI:10.1108/mmms-09-2022-0193
Pandimani Pandimani
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引用次数: 1

Abstract

PurposeThe ultimate capacity and ductility behavior of a reinforced concrete (RC) beam generally depends on its constituent material properties. This study aims to use ANSYS to accentuate the nonlinear parametric finite element (FE) simulations of RC sections under monotonic loading.Design/methodology/approachThe concrete matrix and steel reinforcement are the primary constituent materials of RC beams. The material properties such as tensile reinforcement area, tensile bars yield strength, concrete compressive strength and strain rate in tensile reinforcement at nominal strength have significantly influenced the ultimate response of RC beams. Therefore, these intensive parameters are considered in this study to ascertain their effect on the RC beam's ultimate behavior. The nonlinear response up to the ultimate load capacity and the crack evolutions of RC beams are predicted efficiently.FindingsThe parametric study reveals that increasing the tensile steel reinforcements (from Ast = 213–857 mm2) significantly improves the ultimate load capacity by 229% and yield deflections by 20%. However, it declines the ultimate deflection by 47% and ductility by 56% substantially. Varying the strain limit (?tn = 0.010–0.0015) of tensile reinforcement has proficiently increased the ultimate load-resisting capacity by 20%, whereas the ductility declined by 62%. When the concrete strength increases (from fck = 25–65 MPa), the cracking load increases profoundly by 51%, whereas the ultimate capacity has found an insignificant effect.Originality/valueThe load-deflection response plots extracted from the proposed numerical model exhibit satisfactory accuracy (less than 9% deviation) against the experimental curves available in the literature, which emphasizes the proficiency of the proposed FE model.
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钢筋混凝土梁非线性响应预测的计算建模与仿真
目的钢筋混凝土梁的极限承载力和延性通常取决于其组成材料的特性。本研究旨在利用ANSYS来强调钢筋混凝土截面在单调荷载下的非线性参数有限元模拟。设计/方法/方法混凝土基体和钢筋是钢筋混凝土梁的主要组成材料。受拉钢筋面积、受拉钢筋屈服强度、混凝土抗压强度和标称强度下受拉钢筋的应变速率等材料特性对RC梁的极限响应有显著影响。因此,本研究考虑了这些密集参数,以确定它们对RC梁极限性能的影响。有效地预测了钢筋混凝土梁在极限承载力下的非线性响应和裂缝演化。结果参数研究表明,增加受拉钢筋(Ast=213-857 mm2)可显著提高极限承载力229%和屈服挠度20%。然而,它大大降低了47%的极限挠度和56%的延性。改变受拉钢筋的应变极限(?tn=0.010–0.0015)可使极限承载力提高20%,而延性下降62%。当混凝土强度增加(从fck=25–65 MPa)时,开裂荷载大幅增加51%,而极限承载力的影响不大。原创性/价值从所提出的数值模型中提取的载荷-挠度响应图与文献中的实验曲线相比显示出令人满意的准确性(偏差小于9%),这强调了所提出的有限元模型的熟练程度。
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来源期刊
CiteScore
3.70
自引率
5.00%
发文量
60
期刊介绍: Multidiscipline Modeling in Materials and Structures is published by Emerald Group Publishing Limited from 2010
期刊最新文献
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