【摘要】 在结合钢桁桥损伤程度识别方法的基础上,提出了适用于简支梁结构的两种损伤程度识别方法:整体振型的相关系数法和保证准则法,将其应用到实验室简支梁结构上分别进行数值模拟和试验。脉冲激励下的结果表明,两种方法能较准确地识别损伤单元的等效损伤程度,具有很强的抗噪能力。最后,探讨了激励对提出方法的影响,为工程应用奠定了基础。更多还原

【Abstract】 On the basis of the previous damage severity identification method of steel truss bridges,two damage severity identification methods of simply supported beam bridges are presented: correlation coefficient method and modal assurance criterion method of global mode shapes.Based on a simply supported beam model in the laboratory,both experimental and numerical simulation results under pulse excitation indicate that the proposed methods can identify the damage severity of damaged elements accurately and they have strong anti-noise-interference ability.Moreover,the effect of different excitation on results is examined in the methods;all of these lay a good foundation for engineering.更多还原