氯离子侵蚀后桥墩的抗震性能及损伤指标研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (15) : 263-272.

论文

周敉1，张洋1，姜永存2，朱国强1，刘阳1，兰方言1，吴江3

作者信息 +

Aseismic performance and damage index of pier after chloride ion erosion

ZHOU Mi1, ZHANG Yang1, JIANG Yongcun2, ZHU Guoqiang1, LIU Yang1, LAN Fangyan1, WU Jiang3

Author information +

文章历史 +

摘要

为研究（氯离子）侵蚀对钢筋、混凝土材料性能和桥墩抗震性能的影响，设计了3组6根大比例尺钢筋混凝土墩柱模型，并对各组中的待侵蚀模型试件进行了电化学加速侵蚀。对各试件进行拟静力加载试验，分析侵蚀前后不同墩高和不同配筋率的墩柱模型抗震性能指标的变化规律，并采用Park-Ang和M-Park两种双参数模型评价墩柱的地震损伤。研究结果表明：侵蚀对混凝土和钢筋材料性能产生削弱影响；受侵蚀试件的位移延性能力、承载能力、耗能能力均明显小于未受侵蚀试件；侵蚀试件的等效粘滞阻尼系数在极限位移前大于相应未受侵蚀的试件；侵蚀会明显增加墩柱的地震损伤，在极限位移处增大至未侵蚀墩柱的两倍；墩柱配筋率越大时，侵蚀对墩柱地震损伤的影响越大。
关键词：桥梁抗震；地震损伤；拟静力试验；桥梁墩柱；累积滞回耗能；侵蚀

Abstract

In order to study the effect of erosion on the performance of steel bar and concrete and the seismic performance of bridge piers. Three groups of 6 large-scale reinforced concrete pier models were designed. And electrochemical accelerated erosion was carried out on the specimens in each group to be eroded by the pier model. Pseudo-static loading tests were carried out on all specimens to compare the seismic performance indexes of pier models with different pier heights and reinforcement ratios before and after erosion. And two two-parameter models, Park-Ang and M-Park, were used to evaluate the seismic damage of piers. The results show that the displacement ductility, lateral load capacity and cumulative hysteretic energy of the corroded specimens are significantly lower than those of the uncorroded specimens. The equivalent viscous damping coefficient of the corroded specimens are greater than that of the non-corroded specimens before the ultimate displacement. erosion significantly increases the seismic damage of piers, increasing to twice that of uneroded piers at the ultimate displacement. Meanwhile, the greater the reinforcement ratio is, the greater the influence of erosion on the seismic damage of piers is.
Keywords：Seismic performance; Earthquake damage; Quasi-static test; Bridge pier; Cumulative dissipated energy; erosion

导出引用

周敉1，张洋1，姜永存2，朱国强1，刘阳1，兰方言1，吴江3. 氯离子侵蚀后桥墩的抗震性能及损伤指标研究[J]. 振动与冲击, 2022, 41(15): 263-272

ZHOU Mi1, ZHANG Yang1, JIANG Yongcun2, ZHU Guoqiang1, LIU Yang1, LAN Fangyan1, WU Jiang3. Aseismic performance and damage index of pier after chloride ion erosion[J]. Journal of Vibration and Shock, 2022, 41(15): 263-272

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