SRC框架基于位移的多目标优化设计
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摘要
将SRC框架的工程造价及结构层间位移差最小定为优化目标,并根据SRC框架结构在不同受力阶段各类构件的受力特性,提出两阶段优化设计的思路:小震作用下,认为混凝土处于开裂的临近状态,假定钢材未发挥作用,仅有混凝土发挥作用,据此对结构构件的截面尺寸与混凝土用量进行优化;在中震及大震作用下,对满足结构性能要求的钢材用量进行优化.综合考虑各种约束条件,运用层次分析OC-GA算法实施SRC框架的抗震优化设计,并通过优化设计实例证实所采用的优化思路是有效、可行的.
By taking the minimum of project cost of SRC frame and the difference of structure interlayer displacement of SRC frame as optimization objectives,and according to the force subjecting characteristics of various components in the structure during different loading stages,an idea of two-stages optimization design is presented:the component section and concrete consumption are to be optimized when only the concrete may be assumed to function in minor earthquake and the concrete is in a critical state of cracking;the optimization of steel consumption is to be implemented for meeting the requirement of structure in moderate and severe earthquake.Taking various constraints into comprehensive consideration,the SRC frame is optimized by using hierarchy analysis algorithm,namely the optimization criterion genetic algorithm(OC-GA)and by analyzing apractical example,it is verified that the proposed optimization thought is effective and feasible.
By taking the minimum of project cost of SRC frame and the difference of structure interlayer displacement of SRC frame as optimization objectives,and according to the force subjecting characteristics of various components in the structure during different loading stages,an idea of two-stages optimization design is presented:the component section and concrete consumption are to be optimized when only the concrete may be assumed to function in minor earthquake and the concrete is in a critical state of cracking;the optimization of steel consumption is to be implemented for meeting the requirement of structure in moderate and severe earthquake.Taking various constraints into comprehensive consideration,the SRC frame is optimized by using hierarchy analysis algorithm,namely the optimization criterion genetic algorithm(OC-GA)and by analyzing apractical example,it is verified that the proposed optimization thought is effective and feasible.
引文
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[2]黄冀卓,王湛.钢框架支撑体系连续型拓扑优化设计[J].工程力学,2010,27(11):106-112.
[3]XU Lei,GONG Yanglin,GRIERSON D E.Seismic design optimization of steel building frameworks[J].Journal of Structural Engineering,2006,132(2):277-286.
[4]CAMP C V,BICHON B J,STOVALL S P.Design of steel frames using ant colony optimization[J].Journal of Structural Engineering,2005,131(3):369-379.
[5]ZOU X K,CHAN C M,LI G,et al.Multiobjective optimization for performance-based design of reinforced concrete frames[J].Journal of Structural Engineering,2007,133(10):1462-1474.
[6]CHAN C M,ZOU X K.Elastic and inelastic drift performance optimization for reinforced concrete buildings under earthquake loads[J].Earthquake Engineering and Structural Dynamics,2004,33(8):929-950.
[7]王光远,季天健,张鹏.抗震结构全寿命预期总费用最小优化设计[J].土木工程学报,2003,36(6):1-6.
[8]李刚,程耿东.基于功能的结构体系目标可靠度优化决策[J].计算力学学报,2002,19(2):127-131.
[9]程耿东,蔡悦,蔡文学.基于可靠度的结构优化模型和“强柱弱梁”设计[J].大连理工大学学报,1998,38(6):625-631.
[10]ZOU X K,CHAN C M,LI G,et al.Multiobjective optimization for performance-based design of reinforced concrete frames[J].Journal of Structural Engineering,2007,133(10):1462-1474.
[11]李少泉,沙镇平.钢筋混凝土多高层建筑结构在地震作用下的割线刚度分析法[J].土木工程学报,2003,36(8):37-42.
[12]中华人民共和国住房和城乡建设部.GB 50011—2010建筑抗震设计规范[S].北京:建筑工业出版社,2011.
[13]李志强,郑山锁,陶清林,等.基于失效模式的SRC框架-RC核心筒混合结构三水准抗震优化设计[J].振动与冲击,2013,32(19):44-50.
[14]李志强.SRC框架-RC核心筒混合结构多目标抗震优化设计研究[D].西安:西安建筑科技大学,2013.
[15]中华人民共和国建设部.JGJ 138—2001型钢混凝土组合结构技术规程[S].北京:建筑工业出版社,2002.
[16]中华人民共和国住房和城乡建设部.GB 50010—2010混凝土结构设计规范[S].北京:建筑工业出版社,2010.
[17]邓国专.型钢高强高性能混凝土结构力学性能及抗震设计的研究[D].西安:西安建筑科技大学,2008.
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