Abstract
In the article linear buckling analysis of a set of steel trusses braced by purlins and trapezoidal sheeting are conducted. The buckling load factor due to the height of a corrugated sheeting profile is investigated in parametric studies. The minimal height of trapezoidal sheeting required for preventing the sheeting and chords of the trusses against the buckling is obtained. Two groups of models are considered: “axial” model as a simple one and “eccentric” model as a more complex one. In the second group of models, eccentricity between the top chord of the trusses and purlins is considered, by means of equivalent beam elements. The differences between models are indicated and the results are discussed.
Highlights
It is well-known that sheeting can stabilize purlins against distortional buckling [1]
The present research focused on the buckling study of a set of the trusses stiffened by purlins and trapezoidal sheets
The paper presents the results of stability studies on the set of trusses stiffened by purlins and corrugated cladding
Summary
It is well-known that sheeting can stabilize purlins against distortional buckling [1]. The corrugated sheets of a roof apart from bearing vertical loads are part of bracing which stabilizes purlins and an entire structure, e.g. roof trusses. Large research has been conducted on bracing requirements or effect of corrugated sheeting stiffness on buckling load of various elements of structures (e.g. purlin, top chord of the truss) connected directly to sheeting, as e.g. The present research focused on the buckling study of a set of the trusses stiffened by purlins and trapezoidal sheets. The aim is to find parameters of the roof diaphragm (the height of the trapezoidal sheet profile) which stabilize the cladding and the chords of the trusses against buckling. The influence of the corrugated sheeting and the purlins on buckling load factor of the roof is observed. There is no direct connection between sheeting and trusses except the connection with gable trusses, which is performed using special elements, the so-called shear connectors
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