Across 80° Inclination Of Ground Fissure Shear Wall Structure Seismic Response Study

Xi’an is one of the most typical and most serious cities suffering from ground fractures hazard in China.The use of city planning and construction land is severely constrained because of long formation time and wide distribution of Xi’an ground fractures.So far specification of ground fractures site practice space avoidance measures.However,with the weakening and stabilization of ground fractures in Xi’an,it is possible to construct the structure on ground fractures.And the dip Angle of the ground fractures determines damage degree of the superstructure.Therefore,study on seismic damage mechanism of ground fractures site and crossing the ground fractures structure by numerical simulation has important theoretical significance and engineering practical value.Firstly,ABAQUS finite element software was used to study the dynamic responding characteristics under seismic action of common sites,the dip angle was 60°,70° and 80°,respectively.The results could be summarized as follows.With the earthquake strength and dip angle of ground fractures increasing,the peak ground acceleration increased.All of maximum peak ground acceleration appeared in the cracks of hanging wall.While the peak ground acceleration curves of hanging wall and footwall showed a downward trend and tended to be stable.Secondly,the accuracy of calculation model has been verified through the comparison between the results of ground fractures site shaking table test and the simulation results.Finally,the dynamic response of shear wall structure which crossed the 80° dip angle ground fractures site was analyzed under different earthquake type and intensity.The study found that the storey drift,interstory displacement,the peak relative displacement between top floor and ground floor,overstory peak acceleration and floor shear were increased compared with the common site in the same seismic wave.The elastic-plastic state of shear wall structure was related to the site type and earthquake intensity.The increasing range was related to the earthquake types,earthquake strength and floor position of structure.