Experimental research and numerical analysis on the seismic performance of steel columns corroded in general atmospheric environment
Wang Youde1,2 Shi Tao1,2 Xu Shanhua1,2 Niu Ditao1,2
1. State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Key Lab of Engineering Structural Safety and Durability, Xi'an University of Architecture and Technology, Xi'an 710055, China
Abstract：Accelerated corrosion in general atmosphere was successively carried out on both 20 steel plates and 7 H-shaped columns to study their seismic performance under corrosion effects. Then monotonic tensile tests and cyclic loading tests were respectively conducted on the plate specimens-to study their performance difference. The degradation law of the strength and ductility of the corroded steel was revealed, and a cyclic constitutive model of corroded steel was established. The steel columns were subjected to pseudo. static tests to study the damage process, failure modes and performance degradation law of the corroded steel column. The research results indicated that the bearing capacity, stiffness, ductility and energy dissipation of plates and columns severely degraded after corrosion, and larger axial compression ratio would further accelerate the failure process of the corroded columns. Finally, a numerical simulation method for the seismic performance of damaged steel columns considering the corrosion degree was proposed, and a parameterized extended analysis was carried out to study the influence of factors such as uniform/non-uniform corrosion degree and corrosion distribution range on the seismic performance of the corroded columns. It was showed that the seismic performance degradation of the steel columns caused by non-uniform corrosion was more serious, and the seismic performance degradation was more significant when the corrosion was distributed in the flange and foot area of steel columns.
王友德 史涛 徐善华 牛荻涛. 一般大气环境锈蚀钢柱抗震性能试验与数值分析[J]. 土木工程学报, 2021, 54(6): 62-78.
Wang Youde Shi Tao Xu Shanhua Niu Ditao. Experimental research and numerical analysis on the seismic performance of steel columns corroded in general atmospheric environment. 土木工程学报, 2021, 54(6): 62-78.
