基于模态应变能法的混凝土梁桥结构损伤识别研究

基于模态应变能理论,得到能用于混凝土桥梁结构损伤的识别指标.假定结构存在不同位置和不同程度的损伤,运用Ansya软件进行有限元分析,得到混凝土桥梁损伤前后的前5阶模态,然后再运用计算机软件编程计算结构的各单元的损伤指标.数值模拟结果表明,损伤指标在损伤单元处的数值是最大的.因此,采用所提出的损伤指标,对混凝土桥梁结构进行损伤定位识别是可行的.

Numerical research on concrete beam-bridge structure damage identification based on modal strain energy

Based on the theory of modal strain energy,a damage index is deduced to identify the concrete bridge structure damage.In this paper,supposing there lie some different damage positions and extents in structure,the software Ansys is applied to obtain the first five modes of concrete bridge structure before and after damage by using finite element analysis,and then every element damage index in structure is calculated through applying the computer software program.The numerical results show that the damage ind...