铁路梁桥挠度智能主动控制

王景全; 刘钊; 吕志涛

铁路梁桥挠度智能主动控制

东南大学混凝土及预应力混凝土结构教育部重点实验室, 江苏南京 210096

基金项目:

国家自然科学基金项目 50378015

详细信息

作者简介:
王景全(1976-), 男, 河南唐河人, 东南大学博士研究生, 从事预应力混凝土桥梁结构研究

中图分类号: U448.13
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- 被引次数: 0
出版历程
- 刊出日期: 2005-09-25

Intelligent active control of railway girder bridge deflection

Key Laboratory for Reinforced Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China

More Information

Author Bio:
Wang Jing-quan(1976-), male, doctoral student, 86-25-83790780, wjqyy@sina.com

摘要

摘要: 为实现当前轨道交通对桥梁微挠度的要求, 研究了行车条件下对铁路梁桥挠度进行主动控制的方法, 提出了可以实时调节索力的智能预应力系统的概念及结构, 以中国铁路32 m跨度后张预应力混凝土标准简支梁为例, 考虑快速移动车辆荷载, 采用有限元分析方法, 分析了智能预应力的效应, 提出了一个实现微挠度梁桥的智能预应力控制算法。结果显示智能预应力系统可以调节结构在静活载下的挠度, 使其达到跨度的1/3 200, 在相同挠度控制标准下可以降低梁高达到10%以上, 使桥梁始终处于最佳服役状态。
- 桥梁工程 /
- 智能预应力系统 /
- 挠度控制 /
- 微挠度梁桥 /
- 控制算法
Abstract: The active control of railway bridge deflection was investigated to reach the goal of micro-deflection. The concept of intelligent prestressed system (IPS) was presented. The configuration and details of IPS were introduced. The Chinese railway post-prestressed concrete standard girder bridge was analysed with finite element analysis method. An effectual and simple control algorithm for IPS was put forward. The results indicate that the ratio of girder span to mid-span deflection can reach 3 200, the highth of girder can be reduced by 10%, it is feasible that the system can regulate the force of cable in real time, and control the deflection of railway girder bridge.
- bridge engineering /
- intelligent prestressed system /
- deflection control /
- micro-deflection girder bridge /
- control algorithm

HTML全文

图 1 IPS系统

Figure 1. IPS system

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图 2 液压伺服锚具

Figure 2. IPS anchor

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图 3 应用结构

Figure 3. Used structure

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图 4 桥跨及智能预应力钢筋布置图/mm

Figure 4. Profile of bridge and intelligent tendons

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图 5 跨中挠度与车位曲线

Figure 5. urves of deflection and vehicle positjon

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图 6 智能张拉力与车位曲线

Figure 6. Curve of intelligent force and vehicle position

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图 7 收缩量与车位关系

Figure 7. Relation of shrinkage and vehicle position

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图 8 车位与挠度曲线

Figure 8. Curves of deflection and vehicle position

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参考文献(9)

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