| 盐渍土环境中RC桥墩柱地震损伤试验研究与计算分析∗ |
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| 引用本文： | 赵建军,闫长旺,刘曙光,张菊,牛鹏凯.盐渍土环境中RC桥墩柱地震损伤试验研究与计算分析∗[J].防灾减灾工程学报,2020(3):467-475. |
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| 作者姓名： | 赵建军 闫长旺 刘曙光 张菊 牛鹏凯 |
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| 作者单位： | 内蒙古工业大学土木工程学院, 内蒙古 呼和浩特 010051;内蒙古工业大学矿业学院, 内蒙古 呼和浩特 010051 |
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| 基金项目： | 国家自然科学基金( 51368040)、内蒙古自然科学基金(2015MS0505)、内蒙古高等学校“青年科技英才计划”(NJYT-14-B08)资助 |
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| 摘 要： | 为了研究盐渍土环境中RC桥墩柱的地震损伤,设计制作了10根RC桥墩柱,对其进行了电化学快速锈蚀试验及低周反复加载试验。试验中的主要设计参数为轴压比和锈蚀率。观察和记录了试件的开裂过程及破坏形态,通过实测数据绘制了构件的荷载—位移滞回曲线。在已有基础上提出了锈蚀RC桥墩柱在低周反复荷载作用下的双参数损伤模型,并对其进行了对比分析。试验结果表明:锈蚀率越大,滞回曲线捏缩现象越明显,滞回环面积逐渐减小,峰值荷载和极限位移也逐渐减小,试件耗能能力和延性明显降低,其损伤越来越严重;轴压比越大时,试件极限变形越差,耗能能力越低,其损伤越严重。通过与Mccabe损伤模型及Park-Ang损伤模型进行比较分析,得知该损伤模型更能准确反应构件的实际破坏程度,可为盐渍土环境中RC构件的损伤评估提供参考依据。
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| 关 键 词： | 盐渍土环境 RC桥墩柱 滞回曲线 轴压比 锈蚀率 双参数损伤模型 |
Experimental Study and Calculation Analysis on Seismic Damage of RC Bridge Pier Column under Saline Soil Environment |
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| ZHAO Jianjun,YAN Changwang,LIU Shuguang,ZHANG Ju,NIU Pengkai.Experimental Study and Calculation Analysis on Seismic Damage of RC Bridge Pier Column under Saline Soil Environment[J].Journal of Disaster Prevent and Mitigation Eng,2020(3):467-475. |
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| Authors: | ZHAO Jianjun YAN Changwang LIU Shuguang ZHANG Ju NIU Pengkai |
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| Affiliation: | School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051 , China;School of Mining Technology, Inner Mongolia University of Technology, Hohhot 010051 , China |
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| Abstract: | In order to study the seismic damage of RC bridge pier columns under saline soil environment, 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 provide a reference for damage assessment of the RC member in the saline soil environment. |
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