期刊论文

Experiment on Flexural Behavior and Strengthening of Glued Timber Beams with Small Span to Height Ratio

中文

建筑科学与工程学报

1673-2049

2019

36

6

26-34

10.3969/j.issn.1673-2049.2019.06.004

51578554:国家自然科学基金 :现代木结构工程材制造 20151084:应用技术湖南省工程实验室资助项目

本校为第一机构

为研究工程用胶合木梁的受力性能,对分别采用未增强及在底部粘贴钢板、在底部弯剪区拧入螺钉、在两侧中部粘贴钢板增强方式的4组共计9根跨高比为12的胶合木梁进行受弯承载力试验。通过试验得到各试件破坏形态、荷载-位移曲线,分析了增强后木梁的力学性能和跨中应变分布规律。提出了木梁在三分点受弯试验时发生受拉和受剪破坏的界限跨高比;在验证了受弯木梁的截面应变分布基本符合平截面假定后,提出了小跨高比胶合木梁及增强构件在三分点受弯试验时发生顺纹剪切破坏的极限承载力计算公式。结果表明:小跨高比胶合木梁的破坏形式为顺纹剪切破坏,破坏时无征兆,破坏面基本发生在木梁的中性轴及偏下位...

In order to study the mechanical performance of the glued wood beam used in engineering, the flexural bearing capacity tests on 9 wood beams with the span to height ratio of 12 in 4 groups were carried by means of unreinforced, pasting steel at the bottom, screwing screws in the bottom bending shear area and pasting steel plates in the middle of both sides. The failure forms, load-displacement curves and other properties of the specimens were obtained through tests, and the mechanical properties and the distribution law of mid-span strain of th...