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利用OpenSees有限元软件对美国加州地区的Truckee-I80/Truckee River Bridge(TRB)桥梁结构进行了数值模拟。然后应用改进的直接刚度法对该模型进行了有无测量误差下的单处、多处损伤评估;同时对该桥进行了相应的推覆分析以及地震动输入下的非线性损伤评估。评估结果表明:改进的直接刚度法对以弯曲变形为主的桥梁结构的损伤评估是有效和可行的。
The structure of Truckee-I80 / Truckee River Bridge (TRB) bridge in California, USA was simulated by using OpenSees finite element software. Then the improved direct stiffness method was used to evaluate the damage of the model under single or multiple locations with or without measurement error. At the same time, the corresponding pushover analysis of the bridge and the nonlinear damage assessment under earthquake input were carried out. The evaluation results show that the improved direct stiffness method is effective and feasible for the damage assessment of bridge structures with bending deformation.