| As the widespread promotion and application of explosive technique, it gets more and more attention for the safety of bridge which near the place of blasting vibration, particularly the complex large-scale structure, the safety problem can not be ignored. By the simple appearance, good compatibility, convenient construction, few investment, higher efficiency and so on, Large path continuous rigid frame bridge get more favor by designers and become the main force of the modern bridges in the numerous Types of bridge recent years. It is quite a new field that the great span bridge structure's dynamic response under the action of blasting seismic wave. Therefore, it is necessary to study the dynamic response of large path continuous rigid frame bridge under the action of blasting seismic wave.First, this paper made a general awareness and understanding of the characteristics and its field of research status about blasting seismic wave, including the generation, the mechanism of propagation, attenuation and the factors of seismic effects, all of this as a foreshadowing of studying the dynamic response of Large path continuous rigid frame bridge under the action of blasting seismic wave. It also drew on the achievement got from predecessors in this field.Second, this paper do some analysis and inference about the basic theory which is required in this research. based on the theory of the pile-soil-structure interaction, we establish the contrastive analysis models. Also, it introduced the development and the basic principles of the response spectrum analysis theory and the dynamic time-history analysis theory.Finally, by the response spectrum analysis theory and the dynamic time-history analysis theory, this paper come to load seismic wave on the finite element models of bridge to get the internal force and displacement dynamic response, and then do further analysis and contrastion to get the characteristics of bridge dynamic response. |
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