摘要
混合式叠合梁斜拉桥钢-混结合段的受力分析,通常采用有限元分析与试验相结合的方法。模型试验的加载方式与加载力,需要通过模型设计,并保证其与实桥受力状态一致来确定。以红水河大桥为例,建立了实桥结合段有限元模型并对其加载,提取其中关键截面内力,换算得到对应缩尺模型位置的内力;选取钢-混结合面处的内力作为目标值,加载位置与荷载作为优化变量,其他各截面内力作为约束条件,建立新的数学模型;结合遗传算法对该数学模型进行优化,获得了最优的加载方案。
The force analysis of the steel-concrete composite segment of the hybrid composite beam cable-stayed bridge is usually combined with the finite element analysis and the test.The loading mode and loading force of model test need to be determined by mo-del design and ensure that it is consistent with the stress state of real bridge.Taking the Hongshui River Bridge as an example,the finite element model of the real bridge was established and loaded.The internal force of the key section was extracted from the finite element model,and the internal force corresponding to the position of the scale model was converted.The internal force at the steel-concrete composite section was selected as the target value.The loading position and load were used as optimization variables,and the internal forces of other sections were used as constraints to establish a new mathematical model.The mathematical model was optimized by genetic algorithm to obtain the optimal loading scheme.
作者
冯帆
温伟斌
伍彦斌
曾文宋武
黄方林
FENG Fan;WEN Wei-bin;WU Yan-bin;ZENG Wen-song-wu;HUANG Fang-lin(School of Civil Engineering, Central South University, Changsha 410075, China)
出处
《科学技术与工程》
北大核心
2021年第19期8212-8217,共6页
Science Technology and Engineering
基金
国家自然科学基金(12072375)。
关键词
钢-混结合段
有限元
加载
遗传算法
优化
steel-concrete composite segment
finite element
loading
genetic algorithm
optimization
