胶合竹I形搁栅梁受力性能试验研究

发布时间：2018-04-13 21:39

本文选题：轻型竹结构 + 胶合竹板　；参考：《建筑结构学报》2017年09期

【摘要】：为研究胶合竹I形搁栅梁的受力性能,设计3组共30根不同跨度的胶合竹I形搁栅梁,并在每组试件的不同位置设置指接,采用三等分点处加载的方式对其进行静力试验研究。对胶合竹I形搁栅梁的破坏形态、破坏机理、截面刚度和承载力等进行研究。结果表明:胶合竹I形搁栅梁的跨中截面应变沿梁截面高度基本呈线性分布,符合平截面假定;截面刚度能够满足木工字梁相关规范要求;胶合竹I形搁栅梁的承载力主要由腹板的性能以及腹板和翼缘的指接强度控制。采用加拿大规范CAS 086-01中建议的承载力计算公式,并结合指接处的应力分析,计算得到的试件承载力与试验结果接近。
[Abstract]:In order to study the mechanical behavior of glued bamboo I-shaped joist beam, 30 groups of glued bamboo I-shaped joist beams with different span were designed. The finger joint was set up in different positions of each group of specimens, and the static test was carried out by means of loading at three equal points.The failure mode, failure mechanism, section stiffness and bearing capacity of glued bamboo I-shaped joist beam were studied.The results show that the strain distribution of the mid-span cross section of glued bamboo I-shaped joist beam is linear along the height of the beam section, which accords with the assumption of plane section, and the section stiffness can meet the requirements of woodworking beam.The bearing capacity of glued bamboo I-shaped joist beam is mainly controlled by the performance of web plate and the finger joint strength of web plate and flange.According to the calculation formula of bearing capacity proposed in Canadian Code CAS 086-01 and combined with the stress analysis at the finger joint, the calculated bearing capacity of the specimen is close to the test result.
【作者单位】：湖南大学建筑安全与节能教育部重点实验室;南京工业大学土木工程学院;
【基金】：教育部博士点基金重大项目(20130161130003)
【分类号】：TU366.3

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