中文摘要：

针对桥梁刚度识别问题，在常规桥梁荷载试验的基础上，提出一种将试验加载车沿桥梁纵向逐步前进加载进行桥梁刚度量化识别的方法。引入刚度影响因子矩阵，采用步进加载及有限元模型分别建立实测挠度变化矩阵和计算挠度变化矩阵，并建立控制偏差逼近水平从而对刚度影响因子进行识别的方法及流程。以一座系杆拱桥为例，验证了单一区域及多区域损伤的识别准确性。试验结果表明：拱脚外区域识别精度可达到6．6％；采用步进加载方法可以对混凝土桥梁的刚度进行定位与量化识别；采用多项式拟合对测量结果进行修正后，可提高识别精度，逼近水平提高18％。

英文摘要：

Aiming at the rigidity identification of bridge,based on general bridge loading test,a step-forward loading method was proposed for bridge rigidity quantitative identification.Rigidity effect factor matrix was introduced,measured deflection variation matrix and calculated deflection variation matrix were established by step-forward loading and finite element model respectively, then the deviation was controlled to get convergence to identify rigidity effect factor,and related analysis flow was illustrated.Based on a project of tie-arch bridge,the identification accuracies of single zone damage and multi-zone damage of bridge were verified.Test result shows that the accuracy of bridge identification is 6.6% except the zones near arch feet.The rigidity of concrete bridge can be located and quantitatively identified based on step-forward loading method.Using polynomial fitting to correct the measured data can improve the identification accuracy,and the convergence level increases by 18%.8 figs,20 refs.