Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Built-up nested cold-formed steel compression members subject to local or distortional buckling
Abstract The current cold-formed steel (CFS) design standards have not yet provided adequate design methods for built-up nested CFS channel compression members, which may fail by either local or distortional buckling, despite several research studies in recent times. These research studies have proposed improved DSM based design methods that led to capacity predictions with varying accuracy. Besides, there were some contradicting observations regarding the effects of screw connections on their compression behaviour and capacities. Hence, this research study investigated the behaviour and capacity of nested CFS channel compression members. It included experimental tests of short single channel and nested channel compression members failing by local-distortional interaction and local buckling, respectively, development and validation of suitable finite element models of nested channel compression members and finally a parametric study to (1) show that distortional buckling is not the critical failure mode of nested channel members, and (2) examine the effects of screw characteristics and spacing on their behaviour and capacities. Importantly, the accuracy of currently available design equations in the CFS design standards and recently published research papers was investigated and a simple DSM based design method is recommended. This paper presents the details of this research study, its results and findings.
Graphical abstract Display Omitted
Highlights Investigated the behaviour of short screw-fixed built-up nested channel (NC) compression members. NC members fail by local buckling although single channels are dominated by distortional buckling. For single members dominated by distortional buckling, NC member capacities are more than the sum of individual capacities. For single members dominated by local buckling, NC member capacities are equal to the sum of individual member capacities. Proposed a simplified and reliable design method based on the current DSM equations.
Built-up nested cold-formed steel compression members subject to local or distortional buckling
Abstract The current cold-formed steel (CFS) design standards have not yet provided adequate design methods for built-up nested CFS channel compression members, which may fail by either local or distortional buckling, despite several research studies in recent times. These research studies have proposed improved DSM based design methods that led to capacity predictions with varying accuracy. Besides, there were some contradicting observations regarding the effects of screw connections on their compression behaviour and capacities. Hence, this research study investigated the behaviour and capacity of nested CFS channel compression members. It included experimental tests of short single channel and nested channel compression members failing by local-distortional interaction and local buckling, respectively, development and validation of suitable finite element models of nested channel compression members and finally a parametric study to (1) show that distortional buckling is not the critical failure mode of nested channel members, and (2) examine the effects of screw characteristics and spacing on their behaviour and capacities. Importantly, the accuracy of currently available design equations in the CFS design standards and recently published research papers was investigated and a simple DSM based design method is recommended. This paper presents the details of this research study, its results and findings.
Graphical abstract Display Omitted
Highlights Investigated the behaviour of short screw-fixed built-up nested channel (NC) compression members. NC members fail by local buckling although single channels are dominated by distortional buckling. For single members dominated by distortional buckling, NC member capacities are more than the sum of individual capacities. For single members dominated by local buckling, NC member capacities are equal to the sum of individual member capacities. Proposed a simplified and reliable design method based on the current DSM equations.
Built-up nested cold-formed steel compression members subject to local or distortional buckling
Vy, Son Tung (Autor:in) / Mahendran, Mahen (Autor:in) / Sivaprakasam, Thananjayan (Autor:in)
17.03.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Distortional Buckling of Cold-Formed Stainless Steel Compression Members
| British Library Conference Proceedings | 2000
Distortional Buckling of Cold-Formed Stainless Steel Compression Members
| British Library Conference Proceedings | 2000
Distortional Buckling of Cold-Formed Steel Members
| British Library Online Contents | 2006
Distortional Buckling of Cold-Formed Steel Members
| Online Contents | 2006