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基于三线性分灾模型的结构多目标抗震优化设计
Multi-objective optimization design for seismic structures based on trilinear damage–reduction model
投稿时间:2019-01-30  修订日期:2019-03-23
DOI:
中文关键词:  分灾  抗震设计  多目标优化  结构保险丝
英文关键词:damage–reduction  seismic design  multi-objective optimization  structural fuse
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
李刚 大连理工大学 工程力学系 工业装备结构分析国家重点实验室 ligang@dlut.edu.cn 
王梦晨 大连理工大学 工程力学系 工业装备结构分析国家重点实验室  
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中文摘要:
      本文基于分灾抗震设计概念,发展了基于三线性分灾模型的结构多目标优化设计方法。以防屈曲支撑为分灾构件的框架结构为例,针对分灾构件设计参数,采用多目标遗传算法进行分灾结构多目标优化设计。最终得到了分灾框架结构分灾构件用量、层间位移角等重要特性的多目标优化关系,并进行了相关讨论。结果表明,结构多目标分灾优化模型可以综合考虑结构造价、抗震性能等,并可以根据目标偏好有效地满足设计需求;分灾构件对抗震性能的作用随着震级增大而增强,使用分灾构件的结构能够更好地抵御强震的作用。
英文摘要:
      A multi-objective optimization strategy for seismic structures was proposed based on trilinear damage–reduction model. Considering the frame structures with the buckling-restrained braces (BRB) as the damage-reduction part, the optimization design was performed by using multi-objective genetic algorithm with the cross-section areas of BRB as design variables. The Pareto solution of multi-objective optimization was obtained, and the relations of structural properties, such as total amount of the damage–reduction part and inter-story drift ratio, were discussed. The results showed that the multi-objective optimization model of damage–reduction structure can treat the structural cost, seismic performance comprehensively, satisfying different requirements according to the design preferences. The effect of the damage-reduction part on the structural performance increases considerably with the increase of the earthquake intensity, which means the structure with damage-reduction part can resist the action of severe earthquake effectively.
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