Study On The Safety Assessment Of Bridge Structure Under The Action Of The Explosion Seismic Wave

With the blasting technology widely used in project fields, blasting vibration effect and safety assessment of structures become one important research topic in engineering field. As an important transport infrastructure, Bridge structure security is very important. However, at present the research on aafety assessment of bridge structure under action of the explosion seismic wave was studied rarely. Therefore, it is necessary to thoroughly study the vibration effect and safety assessment role of bridge structure under action of the explosion seismic wave.First, based on the characteristics, parameters and the empirical formulas of explosion seismic wave, The Influencing factors of strength was analysed in this paper, so as to research the difference between blasting vibration and natural earthquakes. At the same time, based on the propagation and attenuation of the explosion seismic wave and vibration process of structure, this paper the behavior of bridge structure under the effect of explosion seismic wave was studied also. And the mechanism of structure of explosion seismic wave interaction with the bridge structure was expounded. Secondly, according to the bridge structure's blasting vibration damage feature,mechanism and influencing factors, various methods of safety assessment and the general existed method standard of blasting vibration's safety assessment, that was analyzed in this paper. And more reasonable dynamic safety assessment methods of the bridge structure's antiknock based on the natural earthquake that was gaven aslo. Finally, combined with practical continuous beam bridge, its vibration effect and safety assessment was carried out, under the action of different explosion seismic wave and different natural earthquake. Then the assessment methods proposed in this paper was verified reasonable.