Topic
Purlin
About: Purlin is a research topic. Over the lifetime, 1773 publications have been published within this topic receiving 6017 citations.
Papers published on a yearly basis
1 / 2
Papers
Patent•
25 Jan 1977
TL;DR: A sheet metal structural shape for use as a stud or mullion in wall construction or a purlin or sub-purlin in deck construction which is symmetrical about a vertical bisecting plane having a central vertical web, two diagonal legs projecting downwardly from one end of the web forming an included angle of about 30° to about 90°, each of the diagonal legs having a leg projecting downwardwardly at its extremity in a plane substantially parallel to the web, each parallel legs having flanges extending outwardly at their extremity, a closure side extending between the extremities
Abstract: A sheet metal structural shape for use as a stud or mullion in wall construction or a purlin or sub-purlin in deck construction which is symmetrical about a vertical bisecting plane having a central vertical web, two diagonal legs projecting downwardly from one end of the web forming an included angle of about 30° to about 90°, each of the diagonal legs having a leg projecting downwardly at its extremity in a plane substantially parallel to the web, each of the parallel legs having flanges extending outwardly at their extremity, a closure side extending between the extremities of the flanges enclosing the area formed by the diagonal sides, parallel sides and closure side, and a stiffening member at the other end of the web. A wall structure utilizing a spaced series of the metal structural shapes with a wall material attached to the flanges of adjacent structural shapes. Also included in this invention is a double wall construction wherein a second wall material is attached between adjacent metal structural shapes to a flat face of the stiffening member of the structural shape. The wall structure is particularly suited to shaft wall construction. A poured concrete or a precast deck and a metal deck structure utilizing a series of the metal structural shapes of this invention providing deck structures of superior insulation, fire resistance and uplift resistance.
90 citations
TL;DR: In this paper, an analytical model for predicting the lateral-torsional buckling of cold-formed zed-purlins partial-laterally restrained by metal sheeting for both down and uplift loadings is presented.
Abstract: This paper presents an analytical model for predicting the lateral-torsional buckling of cold-formed zed-purlins partial-laterally restrained by metal sheeting for both down and uplift loadings. The critical load is determined by using energy methods. The focus of the study is to investigate the individual influences of restraints provided by the sheeting and by interval anti-sag bars, the variation of moment distribution along the longitudinal axis, and boundary conditions on the lateral-torsional buckling behaviour of the purlin.
72 citations
TL;DR: In this article, the eigenvectors and eigenvalues of the covariance matrix were determined for fluctuating wind pressure fields on low-rise building models, and the main conclusions were that the mathematical constraint of orthogonality has a dominant effect on the mode shapes, and association of the modes with physical causes may be fictitious in many cases.
68 citations
TL;DR: In this article, a non-linear elasto-plastic finite element model is proposed to predict the behavior of purlin-sheeting systems without the need for either experimental input or over simplifying assumptions.
Abstract: Purlin-sheeting systems used for roofs and walls commonly take the form of cold-formed channel or zed section purlins, screw-connected to corrugated sheeting. These purlin-sheeting systems have been the subject of numerous theoretical and experimental investigations over the past three decades, but the complexity of the systems has led to great difficulty in developing a sound and general model. This paper presents a non-linear elasto-plastic finite element model, capable of predicting the behaviour of purlin-sheeting systems without the need for either experimental input or over simplifying assumptions. The model incorporates both the sheeting and the purlin, and is able to account for cross-sectional distortion of the purlin, the flexural and membrane restraining effects of the sheeting, and failure of the purlin by local buckling or yielding. The validity of the model is shown by its good correlation with experimental results. A simplified version of this model, which is more suitable for use in a design environment, is presented in a companion paper.
62 citations
Patent•
18 Aug 1975TL;DR: In this article, a roof panel joint construction and clip device for use therein to secure abutting edges of panels so that the clip and associated fastener is concealed and so that panels are capable of expanding or contracting longitudinally due to thermal changes.
Abstract: A roof panel joint construction and clip device for use therein to secure abutting edges of panels so that the clip and associated fastener is concealed and so that the panels are capable of expanding or contracting longitudinally due to thermal changes. Abutting edges of roof panels are crimped together with a lip portion of the clip positioned therebetween while the clip is secured to a purlin with a flange portion of the clip including an elongated slot and a spring clamping member positioned between the head of a fastener and the flange.
59 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2022 | 1 |
| 2021 | 16 |
| 2020 | 49 |
| 2019 | 103 |
| 2018 | 157 |
| 2017 | 178 |