The Experts below are selected from a list of 1743 Experts worldwide ranked by ideXlab platform
Ben Young - One of the best experts on this subject based on the ideXlab platform.
-
Compressive strengths of concrete-filled double-skin (circular Hollow Section outer and Square Hollow Section inner) aluminium tubular Sections:
Advances in Structural Engineering, 2019Co-Authors: Feng Zhou, Ben YoungAbstract:Experimental and numerical investigations of concrete-filled double-skin aluminium stub column with a circular Hollow Section as the outer skin and a Square Hollow Section as the inner skin are pre...
-
experimental study of ferritic stainless steel tubular beam column members subjected to unequal end moments
Journal of Structural Engineering-asce, 2016Co-Authors: Ou Zhao, Leroy Gardner, Ben YoungAbstract:AbstractThis paper presents a comprehensive experimental study of the buckling behavior of ferritic stainless steel tubular Section beam-column structural members subjected to unequal end moments. Testing was carried out on two cold-formed and seam-welded cross Sections—one rectangular Hollow Section (RHS) 100×40×2 and one Square Hollow Section (SHS) 60×60×3 made of grade AISI 410 (EN 1.4003) stainless steel. The experimental investigation included a series of material tensile coupon tests, initial local and global geometric imperfection measurements and 24 beam-column tests under unequal end moments. The experimental setup and procedures are described, and the test observations, including the key test results, the load-deformation histories, and the failure modes, are fully reported. The experimental results were carefully analyzed and then compared with the design strength predictions determined according to the current European code, American specification, and Australian/New Zealand standard for stain...
-
experimental and numerical studies of ferritic stainless steel tubular cross Sections under combined compression and bending
Journal of Structural Engineering-asce, 2016Co-Authors: Ou Zhao, Barbara Rossi, Leroy Gardner, Ben YoungAbstract:AbstractAn experimental and numerical study of ferritic stainless steel tubular cross Sections under combined loading is presented in this paper. Two Square Hollow Section (SHS) sizes—SHS 40×40×2 and SHS 50×50×2 made of Grade EN 1.4509 (AISI 441) stainless steel—were considered in the experimental program, which included 2 concentrically loaded stub column tests, 2 four-point bending tests, and 14 eccentrically loaded stub column tests. In parallel with the experimental investigation, a finite-element (FE) study was also conducted. Following validation of the FE models against the test results, parametric analyses were carried out to generate further structural performance data. The experimental and numerical results were analyzed and compared with the design strengths predicted by the current European stainless steel design code EN 1993-1-4 and American stainless steel design specification SEI/ASCE-8. The comparisons revealed that the codified capacity predictions for ferritic stainless steel cross secti...
-
Experimental Investigation of Aluminum Alloy Stub Columns with Circular Openings
Journal of Structural Engineering-asce, 2015Co-Authors: Ran Feng, Ben YoungAbstract:AbstractThis paper describes a test program on a wide range of aluminum alloy Square Hollow Section stub columns containing central circular openings. A total of 28 compression tests was conducted by applying uniform axial load to the specimens, which were fabricated by extrusion of Square Hollow Sections using 6061-T6 heat-treated aluminum alloys. The column strengths; failure modes (including local buckling failure and material yielding failure); strain distribution along the quarter of Square Hollow Sections at midheight of the columns; and load versus axial shortening curves of test specimens were obtained from the experimental investigation. The test results were compared with the design strengths calculated by using the current design rules given in the design specifications and design rules proposed by other researchers for perforated carbon steel structural members. It is shown that most of the current design rules for perforated carbon steel structural members are generally inappropriate, with co...
-
Tests and Design of Aluminum Tubular Sections Subjected to Concentrated Bearing Load
Journal of Structural Engineering-asce, 2009Co-Authors: Feng Zhou, Ben Young, Xiao Ling ZhaoAbstract:This paper presents a series of tests on high strength aluminum Square Hollow Sections subjected to concentrated bearing load. A total of 64 web-bearing tests was conducted. The test specimens were fabricated by extrusion using 6061-T6 heat-treated aluminum alloy. The tests were carried out under end and interior loading conditions, where the specimens were seated on a fixed solid steel base plate. These tests closely simulated the support condition of the floor joist members seated on solid foundation. The test results were compared with the design strengths obtained using the American Aluminum Design Manual and European code for aluminum structures. It was shown that the design strengths predicted by these codes are either quite conservative or unconservative. Furthermore, the Australian Standard AS4100 and British Standard BS5950 Part 1 were used for aluminum Square Hollow Section with sharp corners. The design rules of steel codes were modified to predict the web-bearing strength based on this study. ...
Xiao Ling Zhao - One of the best experts on this subject based on the ideXlab platform.
-
capacity of high strength Square Hollow Section steel tube filled with concrete and hardwood timber
International Symposium for Tubular Structures, 2018Co-Authors: Hui Jiao, Xiao Ling Zhao, Ghanbari T GhazijahaniAbstract:This paper presents a study on the compressive behavior of a composite structural member that consist of steel, concrete and hardwood timber. Samples were created in such a way that a hardwood timber core was placed in the middle of each SHS tube before concrete was filled in the tube. A total of 14 samples, with the timber diameter ranging from 30 mm to 80 mm, were tested under axial compression. The test results were compared with those of Hollow steel tubes and fully concrete filled tubes. The aim of this study was to explore the feasibility of utilizing the fast-growing planation hardwood resources in Australia to produce innovative structural members for the construction industry.
-
Stress-Concentration Factors in Circular Hollow Section and Square Hollow Section T-Connections: Experiments, Finite-Element Analysis, and Formulas
Journal of Structural Engineering-asce, 2013Co-Authors: Lewei Tong, Hong-zhi Zheng, Fidelis Rutendo Mashiri, Xiao Ling ZhaoAbstract:AbstractNodal T-connections made up of circular Hollow Section (CHS) braces and Square Hollow Section (SHS) chords (CHS-SHS T-connections) have the advantage that they do not require complex brace end preparation when compared with CHS-CHS T-connections. The stress-concentration factors (SCFs) in CHS-SHS T-connections have also been found to be lower than those in SHS-SHS T-connections by previous researchers. At present, no parametric equations have been developed for determination of SCFs for the design of CHS-SHS T-connections. In this investigation, eight CHS-SHS T-connections with unique nondimensional parameters were strain gauged for determination of strain-concentration factors (SNCFs) and therefore SCFs. A three-dimensional finite-element model was then developed using the ANSYS software to simulate the stress distribution at the brace-chord welded interface under axial force and in-plane bending in the brace. Validation of the model was carried out by comparing the SNCFs determined from the expe...
-
Square Hollow Section (SHS) T-joints with concrete-filled chords subjected to in-plane fatigue loading in the brace
Thin-walled Structures, 2010Co-Authors: Fidelis Rutendo Mashiri, Xiao Ling ZhaoAbstract:Abstract In recent years, there has been an increased use of concrete-filled composite tubular joints in bridge construction. The reliability of these joints under fatigue therefore need to be investigated to avoid any catastrophic failures. In this paper, Hollow Section T-joints made up of Square Hollow Section (SHS) chords and braces are investigated. The chords of the SHS–SHS T-joints were concrete-filled thereby forming welded composite tubular T-joints. The SHS–SHS T-joints with concrete-filled chords were strain gauged and tested under static loading to determine stress concentration factors (SCFs) at hot spot locations, where cracks are likely to propagate. Fatigue tests of the welded composite joints were also carried out under cyclic in-plane bending in the brace to obtain stress range vs. number of cycles (S–N) data. The maximum stress concentration factor (SCF) at hot spot locations in a welded composite tubular T-joint was found to be generally lower than the maximum SCF in an empty (or called unfilled) Hollow Section SHS–SHS T-joint. Fatigue failure in welded composite tubular T-joints occurred through the initiation and propagation of cracks at weld toes in either the chord or brace member, with the majority of tests exhibiting the first visual crack at weld toes in the chord. The welded composite tubular T-joints were found to have better fatigue strength compared to the empty Hollow Section SHS–SHS T-joints. Design rules are recommended for the SHS–SHS T-joints with concrete-filled chords through analysis of fatigue test data using the hot spot stress method.
-
Tests and Design of Aluminum Tubular Sections Subjected to Concentrated Bearing Load
Journal of Structural Engineering-asce, 2009Co-Authors: Feng Zhou, Ben Young, Xiao Ling ZhaoAbstract:This paper presents a series of tests on high strength aluminum Square Hollow Sections subjected to concentrated bearing load. A total of 64 web-bearing tests was conducted. The test specimens were fabricated by extrusion using 6061-T6 heat-treated aluminum alloy. The tests were carried out under end and interior loading conditions, where the specimens were seated on a fixed solid steel base plate. These tests closely simulated the support condition of the floor joist members seated on solid foundation. The test results were compared with the design strengths obtained using the American Aluminum Design Manual and European code for aluminum structures. It was shown that the design strengths predicted by these codes are either quite conservative or unconservative. Furthermore, the Australian Standard AS4100 and British Standard BS5950 Part 1 were used for aluminum Square Hollow Section with sharp corners. The design rules of steel codes were modified to predict the web-bearing strength based on this study. ...
-
behaviour of steel beam to concrete filled shs column frames finite element model and verifications
Engineering Structures, 2008Co-Authors: Wenda Wang, Xiao Ling ZhaoAbstract:This paper presents the behaviour of the composite frame with concrete-filled Square Hollow Section (SHS) columns to steel beam. Finite element modeling (FEM) was developed to carry out the behaviour of composite frames under a constant axial load on columns and a lateral cyclic load on the frame. Accurate material and geometrical nonlinear for confined concrete and steel were considered in the analysis. The finite element program ABAQUS was adopted. A damage plastic model for concrete and elasto-plastic model for steel were used respectively. Six composite frame tests were carried out to verify the FE model. Each test frame specimen consisted of two concrete-filled SHS columns and a steel beam to represent an interior frame in a building. The results obtained from the finite element model were verified against those obtained from the experimental results.
Dong-kil Shin - One of the best experts on this subject based on the ideXlab platform.
-
crashworthiness of aluminum cfrp Square Hollow Section beam under axial impact loading for crash box application
Composite Structures, 2014Co-Authors: Dong-kil Shin, Jun Beom KwonAbstract:Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid Square Hollow Section beam were investigated under dynamic axial crushing load for crash box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body crash test model. Each different direction of carbon fibers offers respective crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.
-
crashworthiness of aluminum cfrp Square Hollow Section beam under axial impact loading for crash box application
Composite Structures, 2014Co-Authors: Dong-kil Shin, Jun Beom KwonAbstract:Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid Square Hollow Section beam were investigated under dynamic axial crushing load for crash box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body crash test model. Each different direction of carbon fibers offers respective crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.
-
Crashworthiness of aluminum/CFRP Square Hollow Section beam under axial impact loading for crash box application
Composite Structures, 2014Co-Authors: Hee Chul Kim, Dong-kil Shin, Jung Ju Lee, Jun Beom KwonAbstract:Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid Square Hollow Section beam were investigated under dynamic axial crushing load for crash box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body crash test model. Each different direction of carbon fibers offers respective crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.
-
characteristics of aluminum cfrp short Square Hollow Section beam under transverse quasi static loading
Composites Part B-engineering, 2013Co-Authors: Dong-kil ShinAbstract:Abstract Energy absorption capability and bending collapse behavior of an aluminum (Al)/carbon fiber reinforced plastic (CFRP) short Square Hollow Section (SHS) beam were investigated under transverse quasi-static loading. The Al SHS beam was reinforced by CFRP, and the specimen was co-cured via an autoclave curing process. Three-point bending test was performed with five different lay-up sequences and three different laminate thicknesses. Stable bending collapse accompanying plastic hinge was observed in all specimens. Individual bending collapse behaviors were different depending on the lay-up sequences. The specific energy absorbed (SEA) was improved by up to 29.6% in the Al/CFRP SHS beam specimen with a [0/+45°/90°/−45°] n lay-up sequence and laminate thickness of 1.168 mm (thickness ratio of Al: CFRP = 1: 0.87, 8 plies of prepreg) compared to the Al SHS beam. The SEA was not related with damage area of the Al/CFRP SHS beam. Finite element analysis and theoretical analysis based on Kecman’s model were performed to investigate the effect of reinforcement by CFRP on the Al SHS beam.
-
Characteristics of aluminum/CFRP short Square Hollow Section beam under transverse quasi-static loading
Composites Part B-engineering, 2013Co-Authors: Hee Chul Kim, Dong-kil Shin, Jung Ju LeeAbstract:Abstract Energy absorption capability and bending collapse behavior of an aluminum (Al)/carbon fiber reinforced plastic (CFRP) short Square Hollow Section (SHS) beam were investigated under transverse quasi-static loading. The Al SHS beam was reinforced by CFRP, and the specimen was co-cured via an autoclave curing process. Three-point bending test was performed with five different lay-up sequences and three different laminate thicknesses. Stable bending collapse accompanying plastic hinge was observed in all specimens. Individual bending collapse behaviors were different depending on the lay-up sequences. The specific energy absorbed (SEA) was improved by up to 29.6% in the Al/CFRP SHS beam specimen with a [0/+45°/90°/−45°] n lay-up sequence and laminate thickness of 1.168 mm (thickness ratio of Al: CFRP = 1: 0.87, 8 plies of prepreg) compared to the Al SHS beam. The SEA was not related with damage area of the Al/CFRP SHS beam. Finite element analysis and theoretical analysis based on Kecman’s model were performed to investigate the effect of reinforcement by CFRP on the Al SHS beam.
Ou Zhao - One of the best experts on this subject based on the ideXlab platform.
-
experimental study of ferritic stainless steel tubular beam column members subjected to unequal end moments
Journal of Structural Engineering-asce, 2016Co-Authors: Ou Zhao, Leroy Gardner, Ben YoungAbstract:AbstractThis paper presents a comprehensive experimental study of the buckling behavior of ferritic stainless steel tubular Section beam-column structural members subjected to unequal end moments. Testing was carried out on two cold-formed and seam-welded cross Sections—one rectangular Hollow Section (RHS) 100×40×2 and one Square Hollow Section (SHS) 60×60×3 made of grade AISI 410 (EN 1.4003) stainless steel. The experimental investigation included a series of material tensile coupon tests, initial local and global geometric imperfection measurements and 24 beam-column tests under unequal end moments. The experimental setup and procedures are described, and the test observations, including the key test results, the load-deformation histories, and the failure modes, are fully reported. The experimental results were carefully analyzed and then compared with the design strength predictions determined according to the current European code, American specification, and Australian/New Zealand standard for stain...
-
experimental and numerical studies of ferritic stainless steel tubular cross Sections under combined compression and bending
Journal of Structural Engineering-asce, 2016Co-Authors: Ou Zhao, Barbara Rossi, Leroy Gardner, Ben YoungAbstract:AbstractAn experimental and numerical study of ferritic stainless steel tubular cross Sections under combined loading is presented in this paper. Two Square Hollow Section (SHS) sizes—SHS 40×40×2 and SHS 50×50×2 made of Grade EN 1.4509 (AISI 441) stainless steel—were considered in the experimental program, which included 2 concentrically loaded stub column tests, 2 four-point bending tests, and 14 eccentrically loaded stub column tests. In parallel with the experimental investigation, a finite-element (FE) study was also conducted. Following validation of the FE models against the test results, parametric analyses were carried out to generate further structural performance data. The experimental and numerical results were analyzed and compared with the design strengths predicted by the current European stainless steel design code EN 1993-1-4 and American stainless steel design specification SEI/ASCE-8. The comparisons revealed that the codified capacity predictions for ferritic stainless steel cross secti...
Paul Grundy - One of the best experts on this subject based on the ideXlab platform.
-
fatigue tests and design of thin cold formed Square Hollow Section to plate t connections under cyclic in plane bending
Journal of Structural Engineering-asce, 2002Co-Authors: Fidelis Rutendo Mashiri, Xiao Ling Zhao, Paul GrundyAbstract:Thin-walled tubular Sections (\it<4 mm) are increasingly being used in the road transportation industry and agricultural industry for applications such as lighting poles, traffic sign supports, truck trailers, swing-ploughs, haymakers, and linkage graders. These structures are subjected to fatigue loading and some failures have been observed. Both the International Institute of Welding and International Committee for the Development and Study of Tubular Construction fatigue guides for welded tubular joints apply only to tubes with a thickness above 4 mm. This paper deals with the fatigue design of tube-to-plate \iT joints under cyclic in-plane bending using the classification method. Forty-eight specimens, made up by welding a Square Hollow Section tube (\it<4 mm) to a plate, are fatigue tested. The effects of in-line galvanizing, steel grade, stress ratio, and tube wall thickness on the fatigue life of these joints are investigated. The design stress range-to-number of cycles (\iS–\iN) curves, derived from the least Squares method of analysis, show that the \iS–\iN curves for the tube-to-plate joints lie above the existing \is–\iN curves in the Australian, European, and Canadian standards.
-
Fatigue tests and design of thin cold-formed Square Hollow Section-to-plate T connections under cyclic in-plane bending
Journal of Structural Engineering-asce, 2002Co-Authors: Fidelis Rutendo Mashiri, Xiao Ling Zhao, Paul GrundyAbstract:Thin-walled tubular Sections (\it
