1.同济大学土木工程学院,上海 200092
2.同济大学上海防灾救灾研究所,上海 200092
吕欣亮(1995—),男,硕士研究生。主要从事钢筋混凝土结构抗震性能研究。E-mail:95lxl@tongji.edu.cn
宁超列(1984—),男,助理研究员,硕导,博士。主要从事城市安全与风险评估研究。E-mail:clning@tongji.com
收稿:2019-03-26,
修回:2019-07-08,
纸质出版:2021-06-16
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吕欣亮,任晓丹,宁超列.剪切失效型钢筋混凝土柱滞回模型参数识别与经验预测[J].防灾减灾工程学报,2021,41(03):520-530.
LYU Xinliang,REN Xiaodan,NING Chaolie.Parametric Identification and Empirical Prediction of Hysteresis Model for Shear⁃critical Reinforced Concrete Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):520-530.
吕欣亮,任晓丹,宁超列.剪切失效型钢筋混凝土柱滞回模型参数识别与经验预测[J].防灾减灾工程学报,2021,41(03):520-530. DOI: 10.13409/j.cnki.jdpme.201903077.
LYU Xinliang,REN Xiaodan,NING Chaolie.Parametric Identification and Empirical Prediction of Hysteresis Model for Shear⁃critical Reinforced Concrete Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):520-530. DOI: 10.13409/j.cnki.jdpme.201903077.
在我国中低抗震设防烈度地区的既有钢筋混凝土结构中,有很大一部分既有钢筋混凝土柱在地震作用下容易发生剪切破坏,失去竖向承载力,导致既有建筑发生倒塌,造成严重的经济损失和人员伤亡。一个简单、高效的滞回模型对剪切失效型既有钢筋混凝土柱的抗震性能评估具有重要意义。首先提出了一个简化的七参数折线型滞回模型,然后基于SERIES数据库中的剪切失效型钢筋混凝土柱试验结果,采用微分进化算法,对七参数折线型滞回模型进行了参数识别。最后,采用经验回归分析方法,提出了七参数折线型滞回模型中关键参数的经验预测方程。结果表明:给定设计参数,提出的七参数折线型滞回模型可以方便、快速地预测剪切失效型钢筋混凝土柱的恢复力-位移关系,便于工程应用。
In existing reinforced concrete (RC) structures at medium and low seismic fortification intensity areas of China, a large proportion of RC columns are vulnerable to shear failure under earthquake excitation, leading to the loss of axial load capacity, the collapse of the whole building, and then the severe economic losses and casualties. A simple and efficient hysteresis model is crucial to evaluate the seismic performance of this kind of shear-critical RC columns. In this study, a simplified hysteretic model with seven parameters is first proposed. Then the model parameters involved in the proposed hysteretic model are identified by Differential Evolution (DE) algorithm based on the experiment data of shear-critical RC columns in SERIES database. Finally, empirical prediction equations are developed for critical model parameters of the seven-parameter hysteresis model using the empirical regression analysis method. The investigation reveals that the proposed seven-parameter hysteretic model can predict the inelastoring force-displacement relationship of shear-critical RC columns feasibly and quickly along with its design parameters. It is applicable to engineering practice.
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