Dynamic Loadings Identification of Bridge by the Modal Function Method
| Autor: | Chuan-Teng Liu, 劉傳騰 |
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| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 Overloaded vehicles are prone to produce damage on the road or the bridge structures,especially for the high traffic flow in the important roads or bridges, Based on the importance of transportation safety, many vehicles load identification method (Weigh-In-Motion) are reported recently.One study of the mechanical interaction between the vehicle and the bridge, called the bridge of dynamic load identification methods (Bridge Weigh-In-Motion), the main advantage of this method is using the mechanical strain response of bridges to identify the vehicle's total weight by and axle load. This study is based on the equations of dynamic structures and derive the relationship equations between the degree of freedoms and the strains by discretizing the bridge object.and the degree of freedom can be expanded into the modal shape multiplied by the generalized coordinate by using the modal method. This method can reduce a lot of computing time in the inverse program and can make it to be an immediate (Real-time) analysis of the application. Numerical simulation of the bridge structure is analyzed using the finite element method, from the two-dimensional beam element model to simulate three-dimensional beam elements. To verify the accuracy of the inverse problem by the modal method and to consider influence of the load identification the factors like speed and the number of the strain. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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