期刊论文

Experimental research on flexural bearing capacity of larch glulam T-beam

中文

中南林业科技大学学报

1673-923X

2019

39

5

124-131

10.14067/j.cnki.1673-923x.2019.05.018

国家国际科技合作专项“大跨重型工程木结构材料制造及应用技术研究”(2014DFA53120) 国家林业公益性行业科研专项后续研究课题“T型截面胶合木梁弯曲性能研究”(201304504).

本校为第一机构

为了增强结构整体性与耐久性,节省材料,降低造价,提出一种理论上适合工程应用的正交胶合木T梁这一新的构件形式。采用兴安落叶松板材和结构胶,制作了正交T梁、平行T梁(高跨比1/7.6)及矩形梁(高跨比1/9.2)共3组试件,进行静力弯曲承载力试验,对比分析各类构件的应变、挠度及极限承载力。结果表明: 1)3类梁受弯时均为中部顺纹剪切破坏,正交T梁的抗弯承载力比矩形梁提高了33%,比平行T梁低30%;2)基于刚度等效原则,提出了将正交T梁等效为平行T梁,然后采用Rammer抗剪强度公式来计算其弯曲剪切强度的策略;3)分析表明所提出的策略合理、可靠,扩展了Rammer公式的适用范围。研究成果可为工程应用提供理论依...

In order to enhance the integrity and durability of the structure and save material and cost, a new type of cross glulam T-beam, which is suitable for engineering application in theory, is proposed. Three groups of specimens, including cross T-beam, parallel T-beam (high span ratio 1/7.6) and rectangular beam (high span ratio 1/9.2), were made by using Xing’an larch panel and structural adhesive. Static bending capacity test was carried out to compare and analyze the strain, deflection and ultimate bearing capacity of various components. The e...