预应力碳纤维条带加固混凝土圆柱的地震损伤模型

发布时间：2019-02-11 20:40

【摘要】：为了研究预应力碳纤维条带加固混凝土圆柱的地震损伤性能,利用包括对比柱在内的13根混凝土圆柱试验数据,对修正的Park-Ang损伤模型进行改进,建立了预应力碳纤维条带加固混凝土圆柱的地震损伤模型;根据试件的轴压比、纵向配筋率、考虑了预应力碳纤维条带及箍筋的双重横向约束作用对组合参数进行非线性回归分析,得到了该文推荐模型中组合参数的经验表达式;基于所提出的地震损伤模型,计算出了不同损伤状态的特征点所对应的地震损伤指标,据此给出了预应力CFRP加固混凝土圆柱的抗震分级标准;有限元分析得到的CFRP加固混凝土圆柱的损伤指标与试验结果基本符合,证明了该损伤模型以及加固柱的抗震等级划分标准的合理性。
[Abstract]:In order to study the seismic damage performance of concrete columns strengthened with prestressed carbon fiber strips, the modified Park-Ang damage model was improved by using the experimental data of 13 concrete columns, including contrast columns. The seismic damage model of concrete columns strengthened by prestressed carbon fiber strip is established. According to the axial compression ratio and longitudinal reinforcement ratio, the nonlinear regression analysis of the composite parameters is carried out considering the double transverse constraint of prestressed carbon fiber strips and stirrups, and the empirical expression of the composite parameters in the proposed model is obtained. Based on the proposed earthquake damage model, the seismic damage indexes corresponding to the characteristic points of different damage states are calculated, and the seismic classification criteria for concrete columns strengthened by prestressed CFRP are given. The damage index of CFRP reinforced concrete columns obtained by finite element analysis is in good agreement with the experimental results, which proves the rationality of the damage model and the criterion of seismic grade classification of strengthened columns.
【作者单位】：北京交通大学土木建筑工程学院;国家知识产权局专利局专利审查协作江苏中心;中广电广播电影电视设计研究院;
【基金】：国家自然科学基金项目(51178029)
【分类号】：TU375.3

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