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[1]苏 毅,宗生京,徐 丹,等.竹集成材简支梁抗弯性能试验研究[J].建筑科学与工程学报,2016,33(01):54-60.
 SU Yi,ZONG Sheng-jing,XU Dan,et al.Experimental Study on Flexural Properties of Glued Laminated Bamboo Simply Supported Beams[J].Journal of Architecture and Civil Engineering,2016,33(01):54-60.
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竹集成材简支梁抗弯性能试验研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
33卷
期数:
2016年01期
页码:
54-60
栏目:
出版日期:
2016-01-29

文章信息/Info

Title:
Experimental Study on Flexural Properties of Glued Laminated Bamboo Simply Supported Beams
作者:
苏 毅宗生京徐 丹黄东升周爱萍
南京林业大学土木工程学院
Author(s):
SU Yi, ZONG Sheng-jing, XU Dan, HUANG Dong-sheng, ZHOU Ai-ping
School of Civil Engineering, Nanjing Forestry University
关键词:
竹集成材简支梁竹结构抗弯性能静力试验
Keywords:
glued laminated bamboo simply supported beam bamboo structure flexural property static test
分类号:
-
DOI:
-
文献标志码:
A
摘要:
基于15根竹集成材简支梁的抗弯试验,研究其作为结构构件时的抗弯性能。结果表明:竹集成材简支梁共存在3种主要的破坏形态,即梁底部竹片指接处脆性拉断、梁底部竹束胶合面斜向撕裂及梁底部竹纤维束逐渐拉断;竹梁破坏时的挠度已达梁跨度的1/50,若类同木梁采用梁跨度的1/250作为挠度限值,则可考虑以挠度作为控制指标进行构件设计;竹梁在破坏前,其横截面应变沿梁高度方向基本符合平截面假定;在加载初期,竹梁跨中截面曲率随外荷载基本呈线性变化,当弯矩达到极限弯矩的60%左右时,竹梁的截面曲率开始进入非线性阶段;随着曲率的增大,截面刚度逐渐退化,直至构件破坏。
Abstract:
Fifteen glued laminated bamboo simply supported beams were tested to investigate flexural properties of glued laminated bamboo as structural components. The results show that glued laminated bamboo simply supported beams exhibit three kinds of typical failure modes, such as the brittle finger-pull-off at the bottom of bamboo beams, the oblique tear of bamboo gluing surface at the bottom of bamboo beams, and the gradually pull off of bamboo fiber bundle at the bottom of bamboo beams. The deflection of destroyed bamboo beams have reached 1/50 of beam span, which can be control indicator in structural design, as wooden beams deflection limit is 1/250 of beam span. Before the failure of bamboo beams, cross-section strain distribution along the height is in accord with the plane-section assumption. At the preliminary stage of loading, curvature and loading of glued laminated bamboo beams have a linear relationship. When the moment reaches about 60% of ultimate moment, the curvature of bamboo beams enter the nonlinear stage. With the increase of curvature, the rigidity of the section gradually degenerates to failure.

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更新日期/Last Update: 2016-01-29