基于CBR的山区铁路桥梁大高差桥墩设计研究

针对山区铁路桥梁普遍具有的大高差桥墩这一显著结构特征,引入基于案例推理技术,力争把丰富的山区铁路桥梁大高差桥墩设计经验积累起来,并为后续的山区铁路桥梁建设提供设计参考,使设计更加高效与合理。首先建立包含梁桥、刚构桥、刚构-连续组合体系桥等桥型在内的山区铁路桥梁案例库,采用熵权法确定桥梁主要特征属性权重,并通过灰色关联分析检索得到相似案例的解决办法,最后将该解决办法进行修正以适配目标案例。实例应用结果表明:该技术可对山区铁路桥梁大高差桥墩设计提供合理有效的建议。

Research on Design of Large Height Difference Bridge Pier of Mountain Railway Bridge Based on CBR

Aiming at the remarkable structural characteristics of the large height difference bridge piers commonly found in mountain railway bridges, case-based reasoning technology is introduced to accumulate rich design experiences of mountainous railway bridges, and provide design reference for the subsequent construction of mountain railway bridges. To make the design work more efficient and reasonable, a case library of mountain railway bridges including bridges, rigid-frame bridges and rigid-frame-continuous composite bridges is established. The main characteristic attribute weights of bridges are determined by entropy weight method, and similarities are obtained through grey correlation analysis. Finally, the solution is revised to fit the target case. The application results show that the technology can provide reasonable and effective suggestions for the design of mountain railway bridge piers.