吴山, 何浩祥, 兰炳稷. 面向均匀损伤的RC框架结构抗震优化设计方法[J]. 工程力学, 2024, 41(4): 210-221. DOI: 10.6052/j.issn.1000-4750.2022.05.0388
引用本文: 吴山, 何浩祥, 兰炳稷. 面向均匀损伤的RC框架结构抗震优化设计方法[J]. 工程力学, 2024, 41(4): 210-221. DOI: 10.6052/j.issn.1000-4750.2022.05.0388
WU Shan, HE Hao-xiang, LAN Bing-ji. SEISMIC OPTIMIZATION DESIGN METHOD OF RC FRAME STRUCTURE FOR UNIFORM DAMAGE[J]. Engineering Mechanics, 2024, 41(4): 210-221. DOI: 10.6052/j.issn.1000-4750.2022.05.0388
Citation: WU Shan, HE Hao-xiang, LAN Bing-ji. SEISMIC OPTIMIZATION DESIGN METHOD OF RC FRAME STRUCTURE FOR UNIFORM DAMAGE[J]. Engineering Mechanics, 2024, 41(4): 210-221. DOI: 10.6052/j.issn.1000-4750.2022.05.0388

面向均匀损伤的RC框架结构抗震优化设计方法

SEISMIC OPTIMIZATION DESIGN METHOD OF RC FRAME STRUCTURE FOR UNIFORM DAMAGE

  • 摘要: RC框架结构在地震作用下多出现局部楼层损伤明显或抗力不足问题,通过对抗侧力构件性能的合理优化可实现各楼层损伤程度相近的设计效果,消除薄弱层,达到更为理想的均匀损伤分布模式。提出RC框架结构的均匀损伤设计方法,以各楼层损伤指数相等或相近为优化目标,各层框架柱配筋率为优化变量,通过智能算法与有限元平台协同计算技术,实现RC框架结构均匀损伤优化设计,并采用弹塑性时程分析和IDA方法对优化效果进行验证分析。结果表明,通过智能算法优化框架柱配筋方案可以有效调控结构各层损伤程度,不同地震波作用下结构最优配筋率分布是不完全相同的,并且框架柱的最优配筋率分布也未呈现明显的统计规律,但将不同地震波下优化结果的均值作为框架柱配筋方案可以提高结构抗震能力,该优化方法合理有效。

     

    Abstract: RC frame structures often suffer from local obvious damage or insufficient resistance under earthquake. Through reasonable optimization of the performances of lateral force resisting members, the design effect with similar damage degree of each storey can be realized and the weak storey can be eliminated, so that a more uniform damage distribution mode can be achieved. The uniform damage design method of RC frame structure was proposed. Equal or similar damage index of each storey was set as the optimization objective, and the reinforcement ratio of frame columns of each story was the optimization variable. The uniform damage optimization design of RC frame structure was realized through the collaborative calculation technology of intelligent algorithm and finite element platform. The optimization effect was verified and analyzed by elastic-plastic time history analysis and IDA method. The results indicate that the damage degree of each storey can be effectively controlled by optimizing the reinforcement of frame columns through intelligent algorithm. The optimal reinforcement ratio distributions of the structure under different seismic waves are not exactly the same, and the optimal reinforcement ratio distributions of the frame columns do not show an obvious statistical law. However, if the average value of the optimization results under different seismic waves is taken as the reinforcement scheme of frame columns, the seismic capacity of the structure can be improved. The proposed method is reasonable and effective.

     

/

返回文章
返回