CAJ | 학술논문

投资-效益准则是基于结构性能抗震设计的重要原则，它所追求的设计目标是在结构的初始造价与地震损失期望之间达到一种和谐的优化平衡，使结构在全寿命周期内总费用最小。在以上的单目标优化模型基础上，提出了考虑结构初始造价、损伤期望、检查和维护费用、拆除费用及残余价值和环境污染费用的多目标全寿命优化设计模型。基于所提出的多目标优化设计模型，应用精英保留非劣排序遗传算法，建立了以截面尺寸、纵筋和箍筋的配筋率为决策变量的近海桥梁结构全寿命抗震性能多目标优化设计模型，并给出了优化设计流程及具体实现。结果表明：得到的非劣解在目标空间分布均匀，算法收敛性和鲁棒性较好。
투자-효익준칙시기우결구성능항진설계적중요원칙，타소추구적설계목표시재결구적초시조개여지진손실기망지간체도일충화해적우화평형，사결구재전수명주기내총비용최소。재이상적단목표우화모형기출상，제출료고필결구초시조개、손상기망、검사화유호비용、탁제비용급잔여개치화배경오염비용적다목표전수명우화설계모형。기우소제출적다목표우화설계모형，응용정영보류비렬배서유전산법，건립료이절면척촌、종근화고근적배근솔위결책변량적근해교량결구전수명항진성능다목표우화설계모형，병급출료우화설계류정급구체실현。결과표명：득도적비렬해재목표공간분포균균，산법수렴성화로봉성교호。
Cost-benefit criterion is significant in performance-based seismic design.The obj ective of this criterion can make a reasonable and optimum balance between the initial cost of structures and potential loss expectation of structures,so as to minimize the total cost of structures in the whole life cycle.The multi-obj ective optimum design method based on single-obj ective optimum design method is firstly proposed considering initial cost, cost expectation, maintenance and inspection costs, dismantling fee,residual value and cost for potential environmental pollution.And then,elitist non-dominated sorting genetic algorithm is used to establish life-cycle performance-based seismic design method for bridge structures by taking section size,reinforcement ratio of longitudinal reinforcement and stirrup as decision variables.The optimization design process and the concrete implementation are given in detail.The experimental results show the obtained non-inferior solution has uniform spatial distribution and the target algorithm has good convergence and robustness.