Analysis Of Frame Structure Deformation And Internal Force Caused By Uneven Settlement

There is a process for collapse of mind-out area,from beginning to stability.The severe collapse will lead the ground to inclination,settlement,even forming a basin.Since the frame structure was an independent foundation,which have a bad poor ability to resist deformation,collapse of mined-out area often have greater impact on it.There are many examples of buildings damage caused by collapse of mined-out area.Though it is prohibited mining under existing buildings,lacking of clear ascertainment to underground,there still are many buildings standing on the mined-out areas.We can't guarantee the soil layer above the mined-out areas long-term stability and no risk of collapse,but only take measures passively.So it is necessary to make researches on analysis and rehabilitation of frame structure damage caused by collapse of mined-out areas.In this paper,we took study on the screening workshop of the typical frame structure,and acquired deformation data,which would be used for finite element analysis,by observing and recording the numerical values of inclination and settlement in the field.Through preliminary analysis of data,we found that the deformation of inclination coincided with the one of settlement,and initially judged that the frame structure kept preferable integrity in the process of collapse.According to the limit of tilt of frame structure in the existing relevant specification,we determine the screening workshop seriously do not conform to the standard.According to structure design,related codes and reasonable simplification,we built proper model of finite element analysis.By the comparison of analyzing outcomes and values measured in the field,we determined the reasonableness of the model.In both processes of overall inclination and partial settlement occurred with collapse,we analyzed deformation and internal forces changes of structure separately.Then we obtained the influence of both processes on structure independently,and computed the specific values of the influence,by comparison between both outcomes.We analyzed and computed the deformations and internal forces of structure by taking the inclination and settlement caused by collapse into consideration.Then through comparison of the above outcome with the one of entering inclination and settlement separately,we found out the main reason of structure damage with collapse.We considered the affect of infilled walls by simulation with frame-baroclinic stem model.On the basis of study above,we take a comprehensive analysis on frame structure damage.Through the comparison of current result and the one without infilled walls,we finally obtained the value of effect with infilled walls.Based on the finite element analysis,as well as reformation and damage of structure,we put forward available approach,which will offer some reference to the treatment of structure after accident and new design of structure.