火灾后钢筋混凝土柱损伤识别及动力试验研究

Damage identification and dynamic test study on the reinforced concrete column after fire

基于Timoshenko梁理论对单面受火后的钢筋混凝土柱产生的损伤进行理论识别,包括抗弯刚度损伤,频率的损伤。然后在理论分析的基础上对钢筋混凝土柱进行火灾试验,通过火灾前后混凝土柱动力实测数据来验证上文损伤评定理论。通过试验获得的数据与理论计算数据对比,验证了在主要影响因素(受火时间、轴向压力)下理论计算的准确性和适用性。

Based on the theory of Timoshenko beam, the damage of reinforced concrete column after fire was theoretically identified, including the bending stiffness damage and damage of frequency. Then, on the basis of theoretical analysis, fire test of reinforced concrete column was carried out, and the dynamic test data of concrete column measured before and after the fire can be used to verify the damage assessment theory above. The accuracy and applicability of theoretical calculation under the main influencing factors （ fire time and axial pressure ） were verified by the comparison of test data and theoretical calculation.