考虑装配容差的斜拉桥索塔导管直径设计  

Design of cable tower conduit diameter for cable stayed bridges considering assembly tolerance

作　　者：王晓明[1] 张煜博 邱泓杰 吴润涵 封博顺 高笠翔 孙晨景 WANG Xiaoming;ZHANG Yubo;QIU Hongjie;WU Runhan;FENG Boshun;GAO Lixiang;SUN Chenjing(School of Highway,Chang’an University,Xi’an 710064,China;Weinan Municipal Transportation Bureau,Weinan 714000,China)

机构地区：[1]长安大学公路学院,西安710064 [2]渭南市交通运输局,渭南714000

出　　处：《东南大学学报(自然科学版)》2025年第2期504-515,共12页Journal of Southeast University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52178104);长安大学中央高校基本科研业务费专项资金资助项目(300102214901).

摘　　要：斜拉桥索导管和斜拉索在装配过程中经常会遭遇多种施工扰动,进而引发斜拉索与索导管间的碰撞摩擦,引发安全风险。为了量化斜拉桥索导管的抗误差干扰能力,提出了一种考虑装配容差性能的索塔导管直径设计方法。采用可靠度区间下界描述各类施工扰动,导管直径区间设计作为一个可靠性约束的多目标优化问题求解,建立了基于多维度动态自适应粒子群优化算法的反向传播神经网络(MDAPSO‐BPNN)代理模型,实现了最不利可靠度指标的解耦预测。对某斜拉桥的索导管进行容差设计,结果表明,将不确定性合理量化后,目标斜拉桥索塔导管直径能适应的偏差可达到8.78 mm。该方法可以显著避免多重嵌套寻优产生的巨量算力消耗,在保障结构可靠性、传力最优性、投入合理性等各项综合性能指标的同时,提高其抵抗不确定性施工扰动的容差能力。During the assembly process of cable-stayed bridge cable conduit and cables,there are various construction disturbances,which can cause collision and friction between the cables and cable ducts,posing safety risks.A diameter design method for pylon conduit considering the assembly tolerance performance was proposed to quantify the error interference resistance of cable ducts in cable-stayed bridges.The lower bound of the reliability interval was used to describe various construction disturbances,and the diameter design method for pylon conduit was solved as a multi-objective optimization problem with reliability constraints.A proxy model based on multidimensional dynamic adaptation particle swarm optimization-back propagation neural network(MDAPSO-BPNN)was established,achieving the decoupling prediction of the most unfavorable reliability index.The tolerance design of the cable duct of a certain cable-stayed bridge was carried out.The results show that after reasonably quantifying the uncertainty,the allowable error of the pylon conduit diameter of the target cable-stayed bridge can be adjusted to 8.78 mm.This method can significantly avoid the huge computational power consumption caused by multiple nested optimizations.It can ensure comprehensive performance indicators of structural reliability,optimal force transmission,and reasonable investment while improving its tolerance ability to resist uncertain construction disturbances.

关 键 词：索导管直径 容差设计 区间反演 最不利可靠度解耦 代理模型改良 

分 类 号：U443[建筑科学—桥梁与隧道工程]