基于NSGA-Ⅱ的规则桥梁圆形单柱RC桥墩全寿命造价优化设计  

NSGA-Ⅱ Optimization on Life-cycle Seismic Design of Single Circular Reinforced Concrete Bridge Piers

作　　者：柳春光[1] 张士博[1] 柳英洲 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]辽宁工程技术大学建筑工程学院,辽宁阜新123000

出　　处：《水利与建筑工程学报》2015年第2期1-6,102,共7页Journal of Water Resources and Architectural Engineering

基　　金：国家重点基础研究发展计划资助"973计划"项目(2011CB013605-4);国家自然科学基金项目(51178079);国家自然基金重大研究计划项目(90915011;91315301);辽宁省优秀人才基金资助项目(2014020012)

摘　　要：以基于抗震性能设计基本原则-"投资-效益"准则为理论支撑,提出了将多目标遗传算法与延性抗震设计、地震风险相结合的抗震结构集成全寿命抗震优化设计的新方法,建立了规则桥梁圆形单柱RC桥墩多目标全寿命造价优化设计的通用框架。并应用NSGA-II建立了以圆形单柱RC桥墩截面直径、纵筋和箍筋的配筋率为决策变量,以初始造价和地震损失期望为多目标的全寿命造价优化设计模型。计算结果表明:RC桥墩多目标全寿命造价优化设计为投资者提供了更加灵活的初始投资的选择空间,同时NSGA-II也为该优化设计提供了一个较好的算法支持。Based on the cost-effectiveness criterion,a fundamental principle for performance-based seismic design,a new method for optimizing total life-cycle seismic design of bridge piers was put forward with the consideration of multi-objective genetic algorithm,seismic ductility design and earthquake risks. According to which,the general framework of multi-objective total life-cycle cost optimization design for regular reinforced concrete single circular bridge piers was established. On the platform of NSGA-II,a total life-cycle cost optimization model of this pier was constructed with the decision variable as section diameter; the ratios of the longitudinal reinforcement,the lateral reinforcement,the initial cost of the structure and the expectation of earthquake loss as multiple objectives.The calculation results indicate that this method can provide the investors with a more flexible initial investment options,meanwhile NSGA-II can also equip the designers with a better algorithm support for optimization design.

关 键 词：“投资-效益”准则 全寿命总费用 多目标优化模型 NSGA-Ⅱ 

分 类 号：TU318.1[建筑科学—结构工程]