基于ABAQUS的胶合竹木梁受弯性能分析

Analysis of Flexural Properties of Glued Bamboo-wood Beams Based on ABAQUS Nonlinear

文章建立了胶合竹木梁的有限元分析模型,从竹板布置位置、竹板数量以及梁截面高度等方面分析胶合竹木梁受弯性能,并将分析结果与试验结果比较分析。结果表明:胶合竹木梁的承载力较纯桉木LVL梁提高了31.4%~133.3%;胶合竹木梁模拟值与试验值吻合较好;胶合竹木梁的抗弯刚度比桉木LVL梁有明显的提高;相同截面不同竹板布置,梁上下各布置一层竹板刚度要明显大于梁底布置一层竹板;竹板布置相同截面高度不同,随着梁截面高度的增大,梁的抗弯刚度增加明显;梁截面相同,底部竹板布置越多对梁刚度提高不明显。

In the paper,the finite element model is used to analyze the flexural properties of glued bamboo-wood beams from the aspects of the beams’position layout,numbers and section height.The analysis results are compared with the test results,which show that the bearing capacity of glued bamboo beams is 31.4%~133.3%higher than pure eucalyptus LVL beams.The simulated value of the glued bamboo beam is in good agreement with the experimental value.The flexural rigidity of glued bamboo-wood beams is significantly higher than that of eucalyptus LVL beams.When the bamboo boards are set in different layout with the same cross section,the stiffness of the beam with one layer of bamboo boards layed respectively above and below is significantly greater than that of one layer of bamboo boards layed below.When the bamboo boards are set in the same layout with different heights of cross section,the bending stiffness of the beam increases significantly as the cross section height increases.When the beams are the same in cross section,the more bamboo boards are layed at the bottom,the less evidently the stiffness increases.