The Unstructured Column Single-Bay Street Farmhouse Of Shaking Table Test And Finite Element Analysis

The largest number of casualties and the largest number of casualties is the vast rural areas of China(hereinafter referred to as housing)which are generally non formal design and construction of self building in the earthquake.Ending the repeated earthquake disasters in rural areas is an urgent need for today's rural revitalization strategy.Nearly ten years of earthquake disasters occur frequently in China,and the rural housing is particularly highlighted,the seismic performance of housing has gradually become a hot academic research field of villages and towns in 4.20 Lushan earthquake.However,the Lushan earthquake site investigation of the research group found that the newly built self built single span masonry structure building on the street is particularly serious.So far,no literature has been specially researched in nearly ten years.In fact,the single span masonry building in Lushan earthquake disaster area is the small town of Sichuan common Street building mode.The existing seismic code did not consider the construction of the special housing,the quantitative evaluation of seismic performance of single bay and reinforcement technology research is imminent.In view of this,based on the existing rural housing seismic theory perfect and reinforcement technology selection as the application background,and focused on the street without structure column single bay self rural housing seismic performance to do some basic work.The main research contents and results are as follows:(1)The typical cases of self built single story masonry structures is investigated in small towns in Lushan,Sichuan,East Sichuan,southern Sichuan and Chongqing Dianjiang counties.The construction habits and structural measures are analyzed,and some existing problems are pointed out compared with the existing norms.Based on the single-bay street farmhouses of damage photos in Lushan earthquake,we inspected key parts of longitudinal walls and cross walls to carry out the situation,and analyzed wall shear,bending instability,torsional vibration,collision and whiplash effect damage phenomenon and damage mechanism.It is pointed out that the main reason for building seismic force low.(2)By investigating the single-bay street farmhouses in Lushan earthquake,we select the shaking table test house,and carry out the 1/6 scale model shaking table test on the unstructured column single-bay street farmhouse.The influence of different incident angle for housing vibration response is studied,and the housing torsional response is understand.The vibration response of single-bay street farmhouse is studied under the action of X seismic wave,and the damage phenomenon of single-bay street is understand.The reason of the overall collapse model structure is that the bottom of the model has horizontal cracks.The datas which are the dynamic performance,acceleration,displacement and strain are analyzed,and the seismic performance of the single-bay street the farmhouse is comprehensive evaluated.(3)ABAQUS finite element software is used for elastic-plastic time history analysis and modal analysis in shaking table test model.The results which is dynamic characteristics of the finite element,the model damage,acceleration and displacement reaction,and the shaking table model test are compared and analyzed.In general,the calculation of finite element simulation results was coincident with the results of shaking table test.The rationality of the shaking table model test result is verified,which provide the basis for the subsequent finite element model under the condition of different design.(4)On the basis of the above work,the finite element software ABAQUS is used to contrast analysis the unstructured column single-bay street farmhouse under different design conditions which include the width,depth and layer.The seismic response of single-bay street farmhouse is analyzed under the different design conditions.The shear and compressive bearing capacity of three layer single-bay street farmhouse is checked.The seismic design requirements of single-bay street farmhouse are preliminary explored.