Study On Rapid Assessments Method Of Damage To Buildings Under Blast Loading

Damage degree assessment of the buildings under blast loading is an important subject in explosion accident analysis,structural anti-explosion design,anti-terrorism and military field.For involving explosion and computation mechanics as well as many other subjects,explosion damage assessment is a mission with high professional requirement and time consumption.Therefore,it is extremely urgent to develop a rapid and accurate assessment method.From the perspectives of forecasting of explosion load in architectural building,dynamic response and damage assessment of architectural component under explosive load,the study on rapid assessment on damages of overall architectural structure under the outer explosion is systematically carried out in this paper.Firstly,based on equivalent single degree freedom analysis and P-1 curve assessment method,damage assessment of architectural components under explosion load is conducted.For the complicated process of explosion shock wave and internal & external interaction of architectural structure,the simplified calculating method of making diffraction function equivalent to the projectivity and the simplified model of explosion shock wave on internal function of the structure was put forward in this paper.It is of high computation efficiency and within acceptable range.Currently the study object of anti-explosion and dynamics analysis is mainly limited to the structure.By setting the anti-explosion performance and damage criterion of the component on the safety of overall structure and by combining the rapid calculation of explosion load on architectural structure on the basis of rapid assessment of explosion damage to the single component,the assessment on explosion damage to the overall architectural structure is proposed in this paper.The assessment on damage to the damaged architecture in Tianjin explosion is conducted through independently compiled simulation procedure of rapid assessment on architectural explosion.Besides,the three-dimensional display is realized.Consequently,the computation time of related problems is greatly shortened and the calculation resource is saved.The assessment result is quite in line with the real situation of the explosion plot.It thus indicates that the simplified mode and assessment mode proposed in this paper can be applied into the real project.