FRC对角斜筋小跨高比连梁多目标优化设计

Multi-Objective Optimization Design for FRC Diagonally Reinforced Coupling Beams with Small Span-to-Depth Ratio

摘要: 针对剪力墙结构中连梁工程造价及抗剪承载力问题，通过改变连梁基体材料及配筋方式，借鉴组合结构或构件多目标优化设计思路，对其进行优化设计，寻求更加经济可靠的设计方案。以FRC对角斜筋小跨高比连梁抗震性能试验研究为基础，将连梁的工程造价和抗剪承载力作为优化目标，引入加权系数构造评价函数，并借助复形法求最优解的思路，通过MATLAB编程实现非线性的多目标优化设计。结果表明，优化设计后，FRC对角斜筋小跨高比连梁的工程造价较传统设计连梁降低26%~42%；相应的抗剪承载力提高40%~60%。

Abstract: Aimed at the engineering cost and shear bearing capacity of coupling beam in shear wall structure, by changing the coupling material and reinforcement mode of the coupling beam, the mul-ti-objective optimization design idea of composite structure or component was adopted to optimize these coupling beams, so as to seek a more economical and reliable design plan. Taking the FRC diagonal reinforcement experimental study on seismic performance of short span coupling beams as the design foundation, the author chose beam engineering cost and shear bearing capacity as the optimization goals, introduced weighted coefficients to construct the evaluation function, and used the complex method for the optimal solutions of the multi-objective optimization design idea to realize the nonlinear multi-objective optimization design through MATLAB programming. The result showed that, compared with the conventional design, the engineering cost of the FRC diagonally reinforced coupling beams with small span-to-depth ratio reduced by 26%~42%, and the shear bearing capacity of them improved by 40%~60%.