代旷宇, 于晓辉, 吕大刚. 钢筋混凝土柱的易损性函数研究[J]. 工程力学, 2024, 41(1): 219-228. DOI: 10.6052/j.issn.1000-4750.2022.03.0251
引用本文: 代旷宇, 于晓辉, 吕大刚. 钢筋混凝土柱的易损性函数研究[J]. 工程力学, 2024, 41(1): 219-228. DOI: 10.6052/j.issn.1000-4750.2022.03.0251
DAI Kuang-yu, YU Xiao-hui, LYU Da-gang. FRAGILITY FUNCTIONS FOR REINFORCED CONCRETE COLUMNS[J]. Engineering Mechanics, 2024, 41(1): 219-228. DOI: 10.6052/j.issn.1000-4750.2022.03.0251
Citation: DAI Kuang-yu, YU Xiao-hui, LYU Da-gang. FRAGILITY FUNCTIONS FOR REINFORCED CONCRETE COLUMNS[J]. Engineering Mechanics, 2024, 41(1): 219-228. DOI: 10.6052/j.issn.1000-4750.2022.03.0251

钢筋混凝土柱的易损性函数研究

FRAGILITY FUNCTIONS FOR REINFORCED CONCRETE COLUMNS

  • 摘要: 基于文献调研,建立了满足我国现行设计规范的钢筋混凝土(RC)框架柱的拟静力试验数据库。将RC柱的损伤状态分为六级,并给出了相应修复方法。基于FEMA P-58方法,以位移角为工程需求参数,建立了RC柱在各损伤状态下所对应的易损性函数。通过与FEMA P-58的易损性函数对比,对所建立的易损性函数的质量进行了评定,并讨论了抗震设防等级和轴压比对易损性函数的影响。结果表明:该文所建立的易损性函数整体处于高质量水准。各极限状态下易损性函数中位值范围为0.764%~4.52%,对数标准差范围为0.339~0.425。三、四级框架柱与一级框架柱在各极限状态的易损性曲线的超越概率之差分别高达11.79%和15.39%。一级、二级及三、四级框架柱在高轴压比工况和低轴压比工况下各极限状态的易损性曲线的超越概率之差分别高达到42.61%、37.11%和43.37%。该文研究结果可辅助我国混凝土建筑结构的地震灾害损失评估及韧性分析。

     

    Abstract: A database of reinforced concrete (RC) frame columns that satisfy the requirements of Chinese codes is established based on the literature research. Six damage states and the corresponding repair methods are proposed for RC columns. Based on the FEMA P-58 method, the fragility functions are developed with the rotation angle as the engineering requirement parameter. The quality of the fragility functions is evaluated by comparison with the of FEMA P-58 fragility functions. The effects of seismic grades and axial load ratios on the fragility function parameters and fragility curves are also discussed. The results show that the quality of the proposed function functions is good. The median values of the fragility functions corresponding to the damage state range from 0.764% to 4.52%, and the logarithmic standard deviations range from 0.339 to 0.425. Taking the seismic grade as a variable, the maximum differences between the fragility curves of the frame columns at the third/fourth seismic grade and the frame columns at the first seismic grade are11.79% and 15.39% under the low and high axial load ratio, respectively. Taking the axial load ratio as a variable, the maximum difference between the fragility curves of columns with high and low axial load ratio reached 42.61%, 37.11%, and 43.37% for the columns at the first, second and third/fourth seismic grade, respectively. The results of this paper can be used in the seismic loss assessment and resilience analysis of RC building structures in China.

     

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