【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.更多还原

【Abstract】 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.更多还原