Bending Properties of Parallel Chord Truss with Steel-Web Members

Q2 Engineering Journal of the Korean wood science and technology Pub Date : 2023-05-01 DOI:10.5658/wood.2023.51.3.197

Hyun-Yong Lee, S. Jang

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引用次数: 1

Abstract

A truss is a structure in which the members are connected and arranged such that they are primarily subjected to axial loading. A truss has the advantage that it can be used for a longer span because the structure distributes the applied force to its members well, and the load is transmitted only in the axial direction of the members. Trusses manufactured using timber have more advantages than those made of other materials. In this study, the properties of parallel chord trusses composed of timber chord and steel-web members were evaluated. We constructed truss specimens with various lengths by using upper and lower chords of 2 × 4 inch spruce-pine-fir lumber and steel-web members manufactured by S and P companies. The specimens were tested in accordance with KS F 2150. The test results showed that the load at the deflection limit and the deflection limit itself increased from L/180 to L/360 regardless of the length of the specimens. For specimens of the same length, the load at the deflection limit increased as the height of the parallel timber chord truss specimens increased from 200 to 300 mm. Successive installations of the steel-web members (SST) showed almost 2 times the load at each deflection limit compared to that of SAT specimens (alternate installation of the steel-web members). When comparing the three load– deflection limits in terms of the manufacturer of the steel-web members, the load at each deflection limit for SST specimens was higher than that for PST specimens.

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钢腹板平行弦桁架的弯曲性能

桁架是一种结构，其中的成员被连接和排列，使它们主要受到轴向载荷。桁架的优点是它可以用于更大的跨度，因为结构将施加的力很好地分配到其构件上，并且荷载仅在构件的轴向上传递。用木材制造的桁架比用其他材料制造的桁架有更多的优点。本文对由木弦和钢腹板组成的平行弦桁架进行了性能评价。我们使用S和P公司生产的2 × 4英寸云杉-松木木材和钢腹板构件的上下弦构造了不同长度的桁架样本。试样按照KS f2150进行测试。试验结果表明，无论试件长度如何，挠度极限处的荷载及挠度极限本身均由L/180增大到L/360。对于相同长度的试件，随着平行木弦桁架试件高度从200 mm增加到300 mm，挠度极限荷载随之增加。连续安装的钢腹板构件(SST)在每个挠度极限下的荷载几乎是SAT试件(钢腹板构件交替安装)的2倍。在钢腹板构件制造商的条件下，比较三个荷载-挠度极限时，SST试件的各挠度极限荷载均高于PST试件。

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来源期刊

Journal of the Korean wood science and technology Materials Science-Materials Science (miscellaneous)

CiteScore

5.20

自引率

0.00%

发文量

期刊介绍： The Journal of the Korean Wood Science and Technology (JKWST) launched in 1973 as an official publication of the Korean Society of Wood Science and Technology has been served as a core of knowledges on wood science and technology. The Journal acts as a medium for the exchange of research in the area of science and technology related to wood, and publishes results on the biology, chemistry, physics and technology of wood and wood-based products. Research results about applied sciences of wood-based materials are also welcome. The Journal is published bimonthly, and printing six issues per year. Supplemental or special issues are published occasionally. The abbreviated and official title of the journal is ''J. Korean Wood Sci. Technol.''. All submitted manuscripts written in Korean or English are peer-reviewed by more than two reviewers. The title, abstract, acknowledgement, references, and captions of figures and tables should be provided in English for all submitted manuscripts.