【作者】 朱华伟； 王弘谋； 彭卫；

【Author】 ZHU Hua-wei~(1,3),WANG Hong-mou~(2,3),~*PENG Wei~3 (1.Institute of Structural Engineering,Zhejiang University,Hangzhou 310058,China;2.Institute of Civil Engineering and Architecture,Chongqing Jiaotong University,Chongqing 400074 China;3.Ningbo Institute of Technology,Zhejiang Universiry,Ningbo,315100,China)

【机构】 浙江大学 结构工程研究所； 浙江大学宁波理工学院； 重庆交通大学土木学院；

【摘要】 本文以浙江舟山连岛工程的金塘大桥为分析对象,应用有限元模型,对斜拉桥主梁损伤识别的挠度、索力、梁底弯曲应力、曲率模态、柔度矩阵五种损伤指标进行了研究,分析这五个指标用于分析斜拉桥主梁损伤时的敏感性。结果表明:对主梁损伤识别效果最好的是主梁模态曲率,其次是索力,主梁弯曲应力和主梁柔度矩阵的识别效果相当,主梁挠度识别效果最差。更多还原

【Abstract】 A comparative sensitivity study of the girder damage identification of the cable-stayed Jintang Bridge in Zhoushan Island-Land Project using the deflection index,the cable tension index,the beam bottom bending stress index,the modal curvature index and the modal flexibility matrix is introduced.Based on finite element method of the bridge,a series of damage cases associated with the girder are analyzed.The results show that,for different damage types,the best effect of the girder damage identification is the modal curvature index,followed by the cable tension index,the beam bottom bending stress index is nearly of the same effect as the modal flexibility matrix index,the worst is the deflection index.更多还原