| 由状态变量识别板梁桥上移动荷载 |
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| 引用本文： | 卜建清,罗韶湘,朱信群.由状态变量识别板梁桥上移动荷载[J].振动与冲击,2005,24(4):1-5,13. |
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| 作者姓名： | 卜建清 罗韶湘 朱信群 |
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| 作者单位： | 1. 石家庄铁道学院交通工程系,石家庄,050043
2. 香港理工大学土木与结构工程系,香港 |
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| 基金项目： | 香港政府科研基金(NO．POLY U 5043／02E)
香港理工大学科研基金(NO．G-YW98)资助项目 |
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| 摘 要： | 将板梁桥等效为正交异性板,车辆等效为等间距常速度在正交异性板上移动的一组荷载。根据弹性板理论、HALMITON'S原理和模态叠加原理,得到了系统状态方程,并基于规则化技巧推导了状态空间移动荷载识别方法。数值模拟和试验结果表明,该方法用挠度或应变识别车辆的轴重和轮载都是有效、可行的。
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| 关 键 词： | 板梁桥 移动荷载 正交异性板 状态空间 荷载识别 |
| 收稿时间： | 2003-10-28 |
| 修稿时间： | 2003-10-282004-05-11 |
MOVING LOADS IDENTIFICATION ON SLAB-ON-GIRDER BRIDGE BY USE OF STATE VARIABLES |
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| Bu Jianqing,Luo Shaoxiang,Zhu Xinqun.MOVING LOADS IDENTIFICATION ON SLAB-ON-GIRDER BRIDGE BY USE OF STATE VARIABLES[J].Journal of Vibration and Shock,2005,24(4):1-5,13. |
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| Authors: | Bu Jianqing Luo Shaoxiang Zhu Xinqun |
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| Abstract: | The slab-on-girder bridge is modeled as orthotropic plate,and the vehicles are modeled as a group of loads moving on top of the bridge deck at fixed distance and constant speed.The state equation of the system is obtained on the basis of theory of elastic plate,Halmiton's principle and the superposition principle. Based on the regularization technique a load identification method is developed in state apace. Both the numerical simulation and laboratory tests show that the method is effective to identify the axle loads and the individual wheel loads by strains or displacements. |
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| Keywords: | slab-on-girder bridge moving load orthotropic plate state space load identification |
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