The results show that the moment wave of the span centre of the bridge can detect and locate the damage while the square pulse is applied by means of moment.

• 结果表明，当方波脉冲以力偶方式作用时，通过结构跨中处的弯矩波曲线能够准确的判断损伤存在，确定损伤位置和损伤区域。