基于材料性能退化的非对称截面单阶钢柱滞回性能研究

发布时间：2018-04-14 13:13

  本文选题：锈蚀 + 单阶钢柱　； 参考：《钢结构》2016年12期

【摘要】：考虑局部锈蚀区域截面损失和材料性能退化,借助ABAQUS对非对称截面单阶柱进行低周反复性能非线性分析,得到常轴力、反复水平荷载作用下,不同锈蚀部位、不同锈蚀深度单阶柱的滞回性能变化规律。结果表明,锈蚀深度D变化的影响为:腹板D4 mm,翼缘和腹板同时锈蚀D2 mm时,锈蚀越深,材性退化越明显,阶形柱水平极限承载力、抗侧刚度、滞回耗能和延性等降低较大;翼缘D≤5 mm、腹板D≤4 mm、翼缘和腹板同时锈蚀D≤2 mm时,随着D的增加,滞回性能各指标均有所降低,但变化幅度不明显,对阶形柱恢复力特性影响小;因阶形柱下柱两分肢截面不对称、偏心荷载及荷载-位移(P-Δ)效应,使构件在反向加载时延性劣化突出。
[Abstract]:Considering the loss of section and the degradation of material performance in the local corrosion region, the low cycle repeated nonlinear analysis of asymmetric section single step column is carried out by means of ABAQUS, and the different corrosion sites under constant axial force and repeated horizontal load are obtained.The hysteretic behavior of single column with different corrosion depth is studied.The results show that the effect of the corrosion depth D is as follows: the web D 4 mm and the flange and web corrosion D 2 mm at the same time, the deeper the corrosion is, the more obvious the material degradation is, and the lower the horizontal ultimate bearing capacity, the lateral stiffness, the hysteretic energy dissipation and the ductility of the step column.When the flange D 鈮，

本文编号：1749458