TU1无氧铜轴心受压圆管柱整体稳定性能试验研究
发布时间：2018-11-26 21:02
【摘要】：近年来,铜材料因其自身优良的性能而被广泛应用于许多领域之中.为研究TU1无氧铜轴心受压构件的整体稳定性能,对7个TU1无氧铜圆管柱试件进行了静力试验研究.试验测量了试件的几何初弯曲与荷载初偏心.基于试验结果,分析了该类型构件的失稳模态,得到了其整体稳定承载力,建立了有限元分析模型并对试验结果进行了模拟计算.研究结果表明:试件的破坏模态均为整体失稳;试件的稳定承载力大致遵循随柱子长细比增大而减小的规律;试件的长细比越大,其卸载后不可恢复的塑性变形越小;长细比为55.9~85.6的试件易发生弹性失稳,长细比为22.2~44.8的试件易发生弹塑性失稳;有限元分析模型能够准确地考虑几何初始缺陷的影响,计算结果与试验结果吻合良好.
[Abstract]:In recent years, copper materials have been widely used in many fields because of their excellent properties. In order to study the overall stability of TU1 oxygen-free copper axial compression members, static tests were carried out on 7 TU1 oxygen free copper tube column specimens. The geometric initial bending and the initial eccentricity of load were measured. Based on the experimental results, the instability modes of this type of member are analyzed, and its overall stability bearing capacity is obtained. The finite element analysis model is established and the experimental results are simulated. The results show that the failure modes of the specimens are all integral instability, the stable bearing capacity of the specimens follows the law of decreasing with the increase of the slenderness ratio of the columns, the larger the aspect ratio of the specimens, the smaller the unrecoverable plastic deformation after unloading. When the aspect ratio is 55.9 ~ 85.6, the elastic instability is easy to occur, and the elastic-plastic instability is easy to occur when the aspect ratio is 22.2 ~ 44.8. The finite element analysis model can accurately consider the effect of geometric initial defects, and the calculated results are in good agreement with the experimental results.
【作者单位】： 天津大学建筑工程学院;清华大学土木工程安全与耐久教育部重点实验室;武汉大学土木建筑工程学院;中国科学院高能物理研究所;
【基金】：国家自然科学基金资助项目(51678339) 清华大学自主科研计划课题(学科交叉专项)资助项目(20131089288)
【分类号】：TU392.3
，
本文编号：2359612
[Abstract]:In recent years, copper materials have been widely used in many fields because of their excellent properties. In order to study the overall stability of TU1 oxygen-free copper axial compression members, static tests were carried out on 7 TU1 oxygen free copper tube column specimens. The geometric initial bending and the initial eccentricity of load were measured. Based on the experimental results, the instability modes of this type of member are analyzed, and its overall stability bearing capacity is obtained. The finite element analysis model is established and the experimental results are simulated. The results show that the failure modes of the specimens are all integral instability, the stable bearing capacity of the specimens follows the law of decreasing with the increase of the slenderness ratio of the columns, the larger the aspect ratio of the specimens, the smaller the unrecoverable plastic deformation after unloading. When the aspect ratio is 55.9 ~ 85.6, the elastic instability is easy to occur, and the elastic-plastic instability is easy to occur when the aspect ratio is 22.2 ~ 44.8. The finite element analysis model can accurately consider the effect of geometric initial defects, and the calculated results are in good agreement with the experimental results.
【作者单位】： 天津大学建筑工程学院;清华大学土木工程安全与耐久教育部重点实验室;武汉大学土木建筑工程学院;中国科学院高能物理研究所;
【基金】：国家自然科学基金资助项目(51678339) 清华大学自主科研计划课题(学科交叉专项)资助项目(20131089288)
【分类号】：TU392.3
，
本文编号：2359612
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