CHEN Qiu-yun, TENG Qi-cheng, GAO Yi-fan, et al. Mechanical Properties of Parallel-chord Wood Truss Components with Different Chord Arrangements[J]. China Wood Industry, 2017,31(6):20-25.
CHEN Qiu-yun, TENG Qi-cheng, GAO Yi-fan, et al. Mechanical Properties of Parallel-chord Wood Truss Components with Different Chord Arrangements[J]. China Wood Industry, 2017,31(6):20-25. DOI: 10.19455/j.mcgy.20170604.
Parallel-chord wood trusses are widely used in floor plane systems of light timber frame structures. In practice, components of parallel-chord wood trusses could be arranged in two ways. One is lumber-on-edge truss and another is lumber-on-flat truss. In this study, deflection of top and bottom nodes of these two kinds of parallel-chord wood trusses were measured through static load tests, bearing capacity,rigidity and failure modes of the nodes were analyzed. The results showed that lumber-on-edge trusses provided a better ultimate bearing capacity and higher rigidity with components’ failure as the main failure mode. When it turned to lumber-on-flat trusses, nodes failure was the main failure mode. Chord extension in wood trusses has significant influence on its bearing capacity. Therefore, butt joints shall be strengthened since the safety performance requirement is normally high.
关键词
规格材平行弦木桁架杆件布置静载试验
Keywords
dimension lumberparallel-chord wood trusscomponents arrangementstatic loading test