木材工业2017，Vol.31Issue(6)：20-25,6.DOI:10.19455/j.mcgy.20170604
杆件摆放方式对平行弦木桁架承载力的影响
Mechanical Properties of Parallel-chord Wood Truss Components with Different Chord Arrangements
摘要
Abstract
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Key words
dimension lumber/parallel-chord wood truss/components arrangement/static loading test分类
土木建筑引用本文复制引用
陈秋韵,滕启城,高一帆,阙泽利..杆件摆放方式对平行弦木桁架承载力的影响[J].木材工业,2017,31(6):20-25,6.基金项目
“十二五”国家科技支撑计划项目“多榀木桁架设计研究”(2015BAD14B0503) （2015BAD14B0503）
江苏高校优势学科建设工程资助项目(PAPD). （PAPD）
