基于GA-RS的规则钢筋混凝土桥梁圆形单柱桥墩延性抗震优化设计  

Optimal ductile seismic design of regular RC single-column circular bridge piers based on GA-RS

作　　者：郑玉国[1,2] 袁万城[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]湖南科技大学土木工程学院,湘潭411201

出　　处：《振动与冲击》2010年第3期81-84,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50778131);国家科技支撑计划资助项目(2006BAG04B02);交通部科技项目(200631882225)

摘　　要：提出抗震结构集成优化设计的新方法,将多目标遗传优化算法与反应谱分析很好地结合起来,建立规则钢筋混凝土圆形单柱桥墩多目标抗震优化设计的通用框架,以圆形单柱桥墩的截面半径、纵向钢筋配筋率和横向箍筋配筋率为设计变量,以结构的初始材料造价、抗震强度需求能力比、抗震延性需求能力比为优化目标函数。通过把延性抗震设计问题转化为多目标优化问题,从而使设计者可以很好地平衡抗震设计的各种关键因素,并以可控的方式处理多个优化目标而获得Pareto意义上的最优设计参数。A new integrated optimal design method was proposed for earthquake-resistant structures.Multi-objective genetic algorithm and response spectrum analysis were integrated to establish a general framework for multi-objective optimal seismic design of regular reinforced concrete single-column circular bridge piers.The optimization adopts structural sizing variables such as radius of circular section,longitudinal and transverse reinforcement steel ratios as design variables.And the optimal objectives include the initial material cost,the ratio between demand and capacity of strength and the ratio between demand and capacity of ductility.Through formulating the ductile seismic design problem as a multi-objective optimization problem,designers are able to keep prominent balance in some very important aspects of seismic design and deal with multi-objectives in a controlled manner to find the optimum parameters in Pareto optimal sense.

关 键 词：规则钢筋混凝土桥梁 抗震优化设计 延性抗震设计 遗传算法 反应谱分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]