| 李刚,王梦晨.基于三线性分灾模型的结构多目标抗震优化设计[J].计算力学学报,2020,37(1):1~7 |
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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：10.7511/jslx20190130001 |
| 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:国家自然科学基金面上基金（11872142）资助项目. |
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| 中文摘要: |
| 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和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和抗震性能等，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 deal with the structural cost and 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 that the structure with damage-reduction part can resist the action of severe earthquake effectively. |
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