摘要
以2层落叶松胶合木构件为试验对象,对试验结果进行数据统计及波形分析,证实了采用超声波法测试人工胶缝缺陷部分和胶合完好部分的可行性。同时得到了超声波波速、首波波幅、整体波形这3个参数与胶缝缺陷之间的定性关系,试验者不可仅凭波速或者波幅一个参数来判别胶缝的好坏,要同时结合这2个参数并分析整体波形才可下结论。通过试验及试验结果分析,将对现有测试仪器进行改善,提高其测试精确度的同时将其应用于大型木结构工程项目,方便胶合木结构的现场无损检测。
The glue laminated wood members with two layers of larch glulam have been tested by ultrasonic method. Through data statistics and waveform analysis, it is feasible to test artificially the glue seam defects parts and good glue parts of laminated timbers by ultrasonic method. It also was found that the glue-line defects had qualitative relationship with wave velocity, amplitude and amplitude duration. The tester can＇ t distinguish the quality of the glue seam defects only by wave velocity or amplitude, but should combine these two parameters and the overall waveform to get the conclusions. The existing test equipments should be modified to improve the test accuracy by testing and result analysis. So they may be expediently applied to the large wooden projects for on-destructive testing of laminated wood on site.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2014年第11期150-154,共5页
Journal of Central South University of Forestry & Technology
基金
国家林业局科研专项"木结构工程材制造及应用关键技术研究与示范"(201304504)子项3:木结构工程材质量无损检测与评定(201304504-3)
中南林业科技大学研究生科技创新基金项目(CX2014B34)
关键词
胶合木
胶缝缺陷
超声波法
判据
波速
波幅
波形
laminated wood
glue seam defects
ultrasonic method
criterion
wave velocity
amplitude
waveform
