【摘要】 提出了基于一阶振型斜率改变的剪切型建筑损伤检测方法,并进行了试验验证。首先,对损伤造成的结构各层一阶振型斜率改变进行修正,修正一阶振型斜率改变大于0的层为损伤层。然后,对结构不同损伤程度的单损伤工况进行数值模拟,得到单损伤工况下损伤层在不同损伤程度下的一阶振型斜率改变量。最后,将损伤层的修正一阶振型斜率改变与该层单损伤工况下的一阶振型斜率改变进行比较,得到结构的损伤程度。方法的有效性通过一个三层的剪切型框架模型试验得到了验证。更多还原

【Abstract】 An approach based on the changes in the first order mode shape slopes to detect shear-type frame structures was presented.Firstly,the changes in the first order mode shape slopes caused by damage were modified.When the modified changes in the first order mode shape slopes are larger than zero,the corresponding stories are damaged.Secondly,structural singular damage scenarios with different damage extent were numerically simulated,and the changes in the first mode shape slopes were calculated.Finally,the damage extent of damaged story was identified by comparing the modified changes in the first mode shape slopes with those obtained by numerical simulation.The proposed approach was verified by the experimental test of a three-story shear-type frame structure.更多还原