Determination of reasonable damage index for suspension bridge tower

[摘要] The selection of damage index is not only the premise and basis for structural vulnerability analysis, but also plays an important role in the accuracy of structural damage assessment. Jinsha River long-span suspension bridge under construction is taken as the research object in this paper. Based on the OpenSees program, the selection of the damage index of the suspension bridge tower is studied. The influence of axial force change on the bending moment-curvature is analyzed by XTRACT software. The applicability of material strain as an indicator of bridge tower damage is studied by IDA analysis. The results show that the material strain is the most reasonable damage index for evaluating the damage of the bridge tower compared to the top displacement and the section curvature.

[发布机构] School of Civil Engineering, Beijing Jiaotong University, Beijing; 100044, China^1

[效力级别] 无线电电子学

[关键词] Axial forces;Bridge towers;Damage index;Long span suspension bridges;Moment curvature;Research object;Structural damage assessments;Structural vulnerability