论文部分内容阅读
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.
In order to study the compressive stress-strain model of lateral bamboo composite material, the root bamboo was selected to make the lateral bamboo composite material, and the experimental study and analysis were carried out.The axial deformation was measured by using the non-contact laser displacement gauge placed symmetrically Continuous load-displacement relationship curve.Experimental results show that the failure process of lateral bamboo composite materials can be divided into five stages: elastic stage, elastic-plastic stage, stable basic load stage, load reduction stage and residual load stage The compression damage of lateral bamboo composite material belongs to ductile damage.The five kinds of typical damage forms of lateral bamboo composite material during compression failure are damage and dehiscence of cell wall, cell wall buckling and collapse, Based on the test results and analysis, the simplified stress-strain model and the fine stress-strain model of the lateral bamboo composite are given, and the model results are in good agreement with the experimental data.