Deflection of composite cellular beams

IF 4 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Steel and Composite Structures Pub Date : 2021-01-01 DOI:10.12989/SCS.2021.41.2.223

Hnin Wai Hlaing, P. Panedpojaman

{"title":"Deflection of composite cellular beams","authors":"Hnin Wai Hlaing, P. Panedpojaman","doi":"10.12989/SCS.2021.41.2.223","DOIUrl":null,"url":null,"abstract":"The deflection of composite (cellular) beams is important for serviceability purposes. However, the available methods to predict the deflection are inaccurate. This research aims to propose a method for predicting the deflection with improved accuracy. The proposed deflection consists of contributions from overall flexural behavior and Vierendeel bending. In addition to the slip action, a reduction factor for computing the effective moment of inertia is investigated and used to compute the flexural deflection. The Vierendeel deformation was determined based on shear deflection of a virtual cantilever beam. No local composite action is conservatively assumed in the cantilever beam. Over 700 three-dimensional finite element (FE) models were simulated to investigate the reduction factor and limitations of the proposed method. The FE model was validated against 13 experimental load-deflection curves from the literature. The proposed method is suitable for predicting the deflection of composite cellular beams having the spacing ratio 1.35 or higher and the span ratio higher than 5. For such cases, the deflection estimate is from 0.90 to 1.05 times the FE deflection. The web-post deformation and the global shear deflection affect the prediction accuracy. In comparison to other methods, the proposed method is more accurate in predicting the deflection.","PeriodicalId":51177,"journal":{"name":"Steel and Composite Structures","volume":"41 1","pages":"223"},"PeriodicalIF":4.0000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Steel and Composite Structures","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.12989/SCS.2021.41.2.223","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

The deflection of composite (cellular) beams is important for serviceability purposes. However, the available methods to predict the deflection are inaccurate. This research aims to propose a method for predicting the deflection with improved accuracy. The proposed deflection consists of contributions from overall flexural behavior and Vierendeel bending. In addition to the slip action, a reduction factor for computing the effective moment of inertia is investigated and used to compute the flexural deflection. The Vierendeel deformation was determined based on shear deflection of a virtual cantilever beam. No local composite action is conservatively assumed in the cantilever beam. Over 700 three-dimensional finite element (FE) models were simulated to investigate the reduction factor and limitations of the proposed method. The FE model was validated against 13 experimental load-deflection curves from the literature. The proposed method is suitable for predicting the deflection of composite cellular beams having the spacing ratio 1.35 or higher and the span ratio higher than 5. For such cases, the deflection estimate is from 0.90 to 1.05 times the FE deflection. The web-post deformation and the global shear deflection affect the prediction accuracy. In comparison to other methods, the proposed method is more accurate in predicting the deflection.

查看原文本刊更多论文

复合蜂窝梁的挠度

复合(蜂窝)梁的挠度是重要的使用目的。然而，现有的预测挠度的方法是不准确的。本研究旨在提出一种提高挠度预测精度的方法。提出的挠度由整体弯曲行为和纵向弯曲的贡献组成。除滑移作用外，还研究了计算有效惯性矩的折减系数，并将其用于计算弯曲挠度。基于虚拟悬臂梁的剪切挠度，确定了悬臂梁的竖向变形。在悬臂梁中不保守地假定局部复合作用。通过对700多个三维有限元模型的仿真，研究了该方法的折减系数和局限性。根据文献中的13条荷载-挠度试验曲线对有限元模型进行了验证。该方法适用于预测间距比大于等于1.35且跨比大于5的复合蜂窝细胞梁的挠度。对于这种情况，挠度估计为有限元挠度的0.90 ~ 1.05倍。桩网变形和整体剪切挠度影响预测精度。与其他方法相比，该方法对挠度的预测精度更高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Steel and Composite Structures 工程技术-材料科学：复合

CiteScore

8.50

自引率

19.60%

发文量

审稿时长

7.5 months

期刊介绍： Steel & Composite Structures, An International Journal, provides and excellent publication channel which reports the up-to-date research developments in the steel structures and steel-concrete composite structures, and FRP plated structures from the international steel community. The research results reported in this journal address all the aspects of theoretical and experimental research, including Buckling/Stability, Fatigue/Fracture, Fire Performance, Connections, Frames/Bridges, Plates/Shells, Composite Structural Components, Hybrid Structures, Fabrication/Maintenance, Design Codes, Dynamics/Vibrations, Nonferrous Metal Structures, Non-metalic plates, Analytical Methods. The Journal specially wishes to bridge the gap between the theoretical developments and practical applications for the benefits of both academic researchers and practicing engineers. In this light, contributions from the practicing engineers are especially welcome.