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原文传递 Continuous Beams of Aluminum Alloy Tubular Cross Sections. I: Tests and FE Model Validation

题名：	Continuous Beams of Aluminum Alloy Tubular Cross Sections. I: Tests and FE Model Validation
其他题名：	ABAQUS Version 6.10-1[Computer software].Hibbit,Karlsson&Sorensen,Pawtucket,RI.
正文语种：	英文
作者：	Mei-Ni Su
关键词：	Aluminum alloys;Continuous beams;Experimental investigation;Indeterminate structures;Numerical models;Plastic design;Square and rectangular hollow sections;Testing;Tubular sections;Metal and composite structures
摘要：	The aims of this study are to generate experimental data and develop numerical models for aluminum alloy continuous beams, and to utilize the results to underpin the development of revised design methods for indeterminate structures. This paper presents an experimental program and finite-element (FE) analyses for two-span continuous beams (i.e., five-point bending) of square and rectangular hollow sections (SHSs and RHSs). The experimental program comprised 27 five-point bending tests with three different positioning of loads. The testing procedures and key results are reported. The test specimens were manufactured by extrusion, with 18 of grade 6061-T6 and 9 of grade 6063-T5 heat-treated aluminum alloys. The test specimens were nonslender sections, and mostly of Class 1 proportions. Generally, the specimens failed by the formation of a collapse mechanism comprising three plastic hinges. The distances between the supports and the loading points were varied in order to form the first plastic hinge in different locations, to achieve different load levels between the first hinge and collapse, and to change the rotation demands on the first hinge that formed. The FE models were developed and failure was defined as either when a plastic collapse mechanism was formed or the material fracture strain was reached on the tension flange, whichever occurred first. The numerical models were first validated against the experimentally obtained load-deflection responses, as well as the failure modes. The experimental and FE ultimate loads were both found to be beyond the theoretical loads corresponding to the formation of the first hinge as well as the calculated plastic collapse loads. A key characteristic of aluminum alloy, strain hardening, is shown to be particularly significant in both the experimental program and the numerical investigation. The validated FE models are used to generate numerical results through parametric studies in the companion paper. The development of design rules for indeterminate aluminum alloy structural systems is then described.
出版年：	2015
论文唯一标识：	P-26Y2015V141N09025
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)ST.1943-541X.0001214
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	141
期：	09
页码：	277-283