[1]李海涛,张齐生,吴刚.侧压竹集成材受压应力应变模型[J].东南大学学报(自然科学版),2015,45(6):1130-1134.[doi:10.3969/j.issn.1001-0505.2015.06.019]
 Li Haitao,Zhang Qisheng,Wu Gang.Stress-strain model of side pressure laminated bamboo under compression[J].Journal of Southeast University (Natural Science Edition),2015,45(6):1130-1134.[doi:10.3969/j.issn.1001-0505.2015.06.019]
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侧压竹集成材受压应力应变模型()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第6期
页码:
1130-1134
栏目:
土木工程
出版日期:
2015-11-20

文章信息/Info

Title:
Stress-strain model of side pressure laminated bamboo under compression
作者:
李海涛12张齐生1吴刚2
1南京林业大学土木工程学院, 南京 210037; 2东南大学土木工程学院, 南京 210096
Author(s):
Li Haitao12 Zhang Qisheng1 Wu Gang2
1College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
2School of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
侧压 竹集成材 受压 破坏机理 应力应变模型
Keywords:
side pressure laminated bamboo compression damage mechanism stress-strain model
分类号:
TU366.1
DOI:
10.3969/j.issn.1001-0505.2015.06.019
摘要:
为了研究侧压竹集成材的受压应力应变模型,选取根部原竹制作侧压竹集成材构件,进行试验研究与分析.采用对称放置的非接触式激光位移计来测量轴向变形,得到了连续荷载-位移关系曲线.探讨了侧压竹集成材的受压破坏机理,其破坏过程可以分为5个阶段,即弹性阶段、弹塑性阶段、荷载基本稳定阶段、荷载下降阶段和荷载残余阶段.侧压竹集成材的受压破坏属于延性破坏.侧压竹集成材在受压破坏过程中表现出5种典型的损伤形式,即胞壁层面损伤与层裂、胞壁屈曲与塌溃、微裂隙损伤区的形成与扩展、胶结界面损伤、胞壁断裂.基于试验结果与分析,给出了侧压竹集成材简化应力应变模型和精细应力应变模型,模型结果与试验数据吻合较好.
Abstract:
In order to investigate the stress-strain model of the side pressure laminated bamboo under compression, the root parts of the original bamboo are chosen to fabricate the specimens and a series of axial compression tests are carried out. The axial displacement is measured by using the laser displacement sensor with symmetrical placement, and continuous load-displacement curves are obtained. Then, the damage mechanism of the side pressure laminated bamboo under compression is discussed. The whole failure process can be divided into five stages including the elastic stage, the elastic-plastic stage, the load basic stabilization stage, the load drop stage and the load remnant stage. The failure of the side pressure laminated bamboo under compression is ductile failure. During the failure process, five typical damage forms appear, including the cell wall damage and spallation, the cell wall buckling and collapse, micro-crack damage zone formation and extension, the glue interface damage, and the cell wall fracture. Based on the test results and analysis, a simplified stress-strain model and a fine stress-strain model are proposed, whose results are in good agreement with the test data.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2015-04-08.
作者简介: 李海涛(1982—),男,博士,副教授,lhaitao1982@126.com.
基金项目: 国家自然科学基金资助项目(51308301)、江苏省自然科学基金资助项目(BK20130978)、江苏高校优势学科建设工程资助项目、江苏省博士后科研基金资助项目(1501037A).
引用本文: 李海涛,张齐生,吴刚.侧压竹集成材受压应力应变模型[J].东南大学学报:自然科学版,2015,45(6):1130-1134. [doi:10.3969/j.issn.1001-0505.2015.06.019]
更新日期/Last Update: 2015-11-20