1.山西交院试验检测有限公司,山西 太原 030032
2.兰州交通大学土木工程学院,甘肃 兰州 730070
左鸿鹏(1987—),男,高级工程师,硕士研究生。主要从事公路工程桥隧构造物检测、监测及稳定性评价方面的研究。E-mail:616628409@qq.com
王力(1993—),男,副教授。主要从事大跨度桥梁施工控制理论与人工智能应用研究。E-mail:wanglilzjtu@126.com
收稿:2025-04-30,
修回:2025-06-17,
纸质出版:2025-12-28
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左鸿鹏,王冰,陈朋等.基于机器学习的连续刚构桥施工线形预测研究[J].防灾减灾工程学报,2025,45(06):1411-1420.
ZUO Hongpeng,WANG Bing,CHEN Peng,et al.Research on Construction Alignment Prediction of Continuous Rigid‑frame Bridges Based on Machine Learning[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(06):1411-1420.
左鸿鹏,王冰,陈朋等.基于机器学习的连续刚构桥施工线形预测研究[J].防灾减灾工程学报,2025,45(06):1411-1420. DOI: 10.13409/j.cnki.jdpme.20250430099.
ZUO Hongpeng,WANG Bing,CHEN Peng,et al.Research on Construction Alignment Prediction of Continuous Rigid‑frame Bridges Based on Machine Learning[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(06):1411-1420. DOI: 10.13409/j.cnki.jdpme.20250430099.
针对连续刚构桥施工过程中因复杂环境因素引起的材料参数时变性问题,传统有限元分析方法受限于单一设计参数假设,难以准确模拟施工过程中影响参数的实际变化状态,从而导致桥梁施工期线形控制精度不足等关键技术难题。为此提出一种基于机器学习的连续刚构桥施工线形智能预测方法。首先通过参数化有限元建模,系统模拟多因素耦合作用下的施工挠度响应,构建完备的挠度预测样本数据库。分别基于支持向量机(SVM)、随机森林(RF)、长短期记忆网络(LSTM)以及粒子群优化反向传播神经网络(PSO‑BP)建立4种连续刚构桥施工线形机器学习预测模型,并对其预测精度进行对比分析。研究结果表明:RF和ELM模型的预测精度相对较低;LSTM模型预测精度较好,预测最大误差为1.2 mm;PSO‑BP模型则展现出最优的预测性能,其训练集和测试集的拟合优度分别达0.996和0.992,预测挠度绝对误差仅0.55 mm,相对误差均小于10%;采用PSO‑BP神经网络算法可实现连续刚构桥施工挠度的精准预测,有效提升该类桥施工线形控制水平,提高合龙精度,该研究成果可为桥梁工程智能化施工提供必要参考。
Given the time-varying characteristics of material parameters caused by complex environmental factors during the construction of continuous rigid-frame bridges
the traditional finite element analysis method is limited by the assumption of a single design parameter
and it is difficult to accurately simulate the actual changing state of the influencing parameters during the construction process
which leads to key technical problems such as insufficient alignment control accuracy during bridge construction. Therefore
this study proposed an intelligent prediction method for construction alignment of continuous rigid-frame bridges based on machine learning. First
parametric finite element modeling was used to simulate the construction deflection response under the coupling of multiple factors
and a complete deflection prediction sample database was constructed. On this basis
four construction-alignment prediction models based on support vector machine (SVM)
random forest (RF)
long short-term memory network (LSTM)
and particle swarm optimization backpropagation neural network (PSO-BP) were established
and their prediction accuracy was compared and analyzed. The results showed that the prediction accuracy of RF and ELM models was relatively low. The LSTM model exhibited better prediction accuracy
with a maximum prediction error of 1.2 mm. The PSO-BP model showed the best prediction performance. Its R² values for the training set and the test set were 0.996 and 0.992
respectively. The absolute error of the predicted deflection was only 0.55 mm
and the relative error was less than 10%. The PSO-BP neural network enables accurate prediction of construction deflection
effectively improves the alignment control level of continuous rigid-frame bridge construction
and enhances the closure alignment accuracy of the bridge. The findings provide an important technical reference for the intelligent construction of bridge engineering.
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