| 钢筋混凝土柱地震损伤模型比较研究 |
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| 引用本文： | 苏佶智,刘伯权,邢国华.钢筋混凝土柱地震损伤模型比较研究[J].世界地震工程,2018,34(2):080-88. |
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| 作者姓名： | 苏佶智 刘伯权 邢国华 |
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| 作者单位： | 长安大学 建筑工程学院, 陕西 西安 710061 |
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| 摘 要： | 损伤指数是判断结构或构件经受地震作用后是否破坏、评价结构或构件破坏程度的重要指标，是对震后受损结构进行安全评估和修复加固的重要理论依据。基于40组钢筋混凝土柱的试验结果，对国内外7种较具代表性的损伤模型进行了对比分析。研究结果表明:对于同一试件，不同损伤模型计算得到的损伤指标差异较大，损伤曲线发展趋势亦不同；基于能量的损伤模型多表现出前期增长速度快和后期增长速度慢的上凸趋势，而基于变形和能量组合形式的双参数损伤模型多表现出前期增长速度慢和后期增长速度快的上凹趋势；Park-Ang模型及其改进形式能够较好地反映构件层次的损伤发展过程，但未知参数较多，计算过程较复杂，不利于整体结构层次的震害评估；从能量耗散原理角度提出的损伤模型更符合整体结构抗震的本质，未知参数少且计算过程简单，但存在边界条件的界定不明确的缺陷，因此还需要做更深入的研究。
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| 关 键 词： | 钢筋混凝土柱 基于性能的抗震设计 损伤模型 损伤指数 |
Comparative analysis on seismic damage models for reinforced concrete columns |
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| SU Jizhi,LIU Boquan,XING Guohua.Comparative analysis on seismic damage models for reinforced concrete columns[J].World Information On Earthquake Engineering,2018,34(2):080-88. |
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| Authors: | SU Jizhi LIU Boquan XING Guohua |
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| Institution: | School of Civil Engineering, Chang’an University, Xi’an 710061, China |
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| Abstract: | The damage index is a crucial parameter to determine whether the structure or component is failed after an earthquake and to assess the extent of the damage.It is also an important theoretical basis of safety assessment and restoration of the earthquake damaged buildings.This paper conducts a comparative analysis on seven representative damage models at home and abroad based on the experimental results of forty reinforced concrete columns.The results indicate that there is great difference between the damage indices obtained by different damage models in the same specimen,and the development trend of damage curves are also different.The energy-based damage models mainly show a upper convex trend of a rapid growth in the early stage but a slow growth in the later stage.In contrast,the two-parameter damage models based on the combination of deformation and energy mainly show a upper concave trend which performs a slow growth in the early stage but a rapid growth in the later stage.Park-Ang damage model and its improved form can reflect the damage development process at member level effectively,but they are not suitable for earthquake disaster assessment at structure level because of the numerous unknown parameters and complex calculation process.The damage models based on energy dissipation principle,which have less unknown parameters and simple calculation process,are in more accord with the nature of structure anti-earthquake performance,but further researches are still needed to fill the gap in the definition of boundary conditions. |
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| Keywords: | reinforced concrete column performance-based seismic design damage model damage index |
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