CAPACITY EVALUATION OF RC T-GIRDER BRIDGE WITH VIBRATION TESTING TECHNIQUE

According to the experimental results of damnification test on four pieces of RC simple T-beam and applied nonlinear regression analysis, The family curves for equation which expresses the relation of stiffness ratio and frequency ratio for T-beam are obtained. A relation for structural dynamic characteristics and bearing capacity of RC single beam is proposed in the article. Based on the measured basic frequency and crack characteristics, dynamic characteristic of the whole bridge is divided into single beam. So the model of dynamic assessment can be expressed: structural basic frequency and crack characteristic rigidity nominal ratio of reinforcement bending resistance of single beam. According to the dynamic assessment of a typical RC simple bridge, the reliability and applicability of the method is verified. The evaluation method with vibration testing technique is accurate, speedy and convenient.