Small Bridge Of The Existing Concrete, The Dynamic Performance Of Research And Testing

The dynamic characters of bridge are the important parameter which assesses the ability condition of the bridge loading. It is the premise to carry on the calculation of the structure dynamic response, and is a sort of token of the structure's total appearance. On the one hand, the dynamic function and deformation nature of the bridge structure under the dynamic loads such as vehicle and crowd could be uncovered more truly; On the other hand, the systematic effects of the earthquake and the wind force could be discovered.In this paper, via aiming at the administrative demand of service small-sized concrete bridges, on the basis of research about the dynamic properties of bridge at home and abroad, according to the current technological and economic conditions, and integrate the structural characteristics of small-sized concrete bridge, the analysis and testing ways of dynamic properties of service small-sized bridges are analyzed, studied and practiced. The main contents include:1. The actuality of reseaching on the dynamic performances of service small-sized concrete bridges at home and abroad are narrated briefly, and the structural characteristics of small-sized concrete bridges in our country are to. It is enucleated that analyzing and testing the dynamic properties of bridges have important meanings on the decision-making of repair and getting rid of potential risks immediately.2. The method of analysis and measurement of dynamic performances of service bridge structures are concluded, mainly on the bridge dynamic test contents and methods. The existing main techniques of bridge dynamic testing are investigated. and also compared the range that applies and the advantages and disadvantages for each of them.3. Aiming at the structural characteristics of service small-sized concrete bridges, the appropriate advanced scheme of analysis and measurements of existing bridge dynamic performance are proposed.4. By dynamic testing, the dynamic performance of a prestressed concrete bridge, which at changzhou jiangsu. are tested and analyzed.