盐渍土环境中 RC 桥墩柱地震损伤试验研究与计算分析

In order to study the seismic damage of RC bridge pier columns under saline soil environ⁃ ment，10 RC bridge pier columns were designed and fabricated，and the electrochemical rapid rust test and the low cycle repeated loading test was performed. The main design parameters are axial load ratio and corrosion rate in the test. The cracking process and failure form of the specimen are observed and recorded. The load-displacement hysteretic curve of the component is drawn with measured data. A two-parameter damage model of rusted RC bridge pier columns under low cycle repeated loads is proposed and analyzed. The test results show that the higher the corrosion rate，the more obvious the shrinkage of hysteresis curve，the decrease of hysteresis ring area，the reduction of peak load and limit displacement and the decrease of energy dissipation and ductility of test parts. The higher the axial load ratio，the worse the limit deformation，the lower the energy dissipation，the more serious the damage. Through comparing with Banon damage model and Park-Ang damage model，it is found that this damage model can more accurately reflect the actual damage degree of components and can pro⁃ vide a reference for damage assessment of the RC member in the saline soil environment.