Experimental Investigations on Web Crippling Failure Modes of Aluminum Hollow and Composite Tubes

• 作者: Fernando Palacios Galarza Kang He Xixiang Chen Yu Chen
• 来源期刊: 结构耐久性与健康监测(英文)
• 学科: 工学
• 关键词: Web-crippling ALUMINUM HOLLOW SECTION ALUMINUM composite SECTION loading condition bearing length web SLENDERNESS ratio ULTIMATE capacity
• 年，卷（期）: 2018,（4）
• 页码范围: 299-322
• 页数: 24页
• 分类号: TP3

摘要

In order to study the web-crippling behavior of aluminum hollow sectionsubjected to concentrated load, sixteen aluminum hollow tubes with different loadingconditions, bearing length and web slenderness ratios were tested. This paper alsodiscussed a method to improve the web crippling strength of the aluminum hollowsections by infilling the mortar as composite section, and four aluminum compositesections were tested. The literature has reported lots of web crippling tests, but there isfew reports on web crippling behavior of aluminum composite sections. Interior-Ground(IG) and End-Ground (EG) loading conditions were adopted, with the specimens placedon the ground to simulate the load of floor joists. Specimens were also placed on abearing plate with end (ETF) or interior (ITF) bearing load. The influence of supportingconditions, loading positions, bearing length and web slenderness ratios on web cripplingultimate bearing capacity and ductility of aluminum hollow sections was studied. Theenhancements of infilling mortar were also evaluated. The results obtained from theexperiments show that infilling the mortar in aluminum hollow tubes is an effectivemethod for enhancing the ultimate capacity of the web, especially for specimens underInterior-Ground (IG) condition. Based on the results of parameter research, this paperproposes a series of design formulas for well predicting web crippling ultimate capacityof aluminum hollow and composite tubes under four different loading and boundaryconditions.