Study On Seismic Behaviour Of Glazed Hollow Bead Insulation Concrete Shear Wall With Different Shear Span Ratio

In recent years,the problem of energy crisis has become more and more serious and the consumption of energy has increased much,among that,the energy consumption of buildings is one of the three major energy consumption.Shear wall is the most widely used component in the building outer structure of multilayer and tall building structure,so developing this wall which has good anti-seismic ability and heat insulation performance is an efficient path to promote energy-saving building and ease the energy crisis.The glazed hollow bead insulation concrete shear wall this paper studied is a kind of new heat preservation system of building structure which is made by glazed hollow bead insulation concrete.Compared with traditional shear wall,this system not only has the same anti-seismic property with traditional shear wall,but also has advantages of light weight,good heat preservation effect,few construction procedure,same life with structure,high durability,few basis and maintain cost,remarkable economical benefit and so on.With heat insulation function,the system has achieved insulation bearing integration,adapts development requirements of building energy conservation.In this text,though the method of shear wall low cycle loading experiment and ABAQUS finite element analysis,anti-seismic property of glazed hollow bead insulation concrete shear wall with different shear span ratio was studied.Thesis mainly work includes:1.Experiments in which gla2:ed hollow bead insulation concrete shear wall was stressed by horizontal low cycle loading were done.The failure characteristics of shear wall were observed and the anti-seismic property was analyzed.The test results show that the new wall's crack develops slowly and evenly,late stiffness is stability,anti-seismic property is good,therefore,it can be used in various building structures as main component to resist lateral force.2.Experiments were done on glazed hollow bead insulation concrete shear wall of three different shear span ratio,and the influence of shear span ratio to specimen failure pattern and anti-seismic property indexes was analyzed,as a result,the more beneficial shear span ratio to shear wall seismic was gained.Low-rise shear wall GSW-l's crack distribution range is fewer,and in the end,through cracks appear on the wall and the wall is shearfailure which means that horizontal bearing capacity and rigidity down to a small value when force reaches limit and the wall suddenly destroys.GSW-2 and GSW-3 shear wall's cracks develops more uniformly and distributes broader,and the damage is mainly bottom concrete's compression failure,and when the bearing capacity reaches max it maintains stable uniform decline and the wall doesn't destroy immediately.As for the ductility performance,high shear wall shows better energy-dissipating capacity,relatively stable late stiffness and bending shear failure pattern.Compared with the shear wall whose shear span ratio is 0.93,the shear wall whose shear span ratio is between 1.24?1.52 has better anti-seismic property,so it can be used in various buildings.3.Nonlinear analysis of five shear walls was done with ABAQUS finite element software,and the failure characteristics,ductility performance and the anti-seismic property was studied.According to the simulation result,the following conclusions could be drawn:(1)The simulation result agrees with experiment,and the finite element simulation specimen's failure pattern and each stage of the load and displacement agree was the same with experiment results by comparing and analyzed the finite element and test results;(2)Shear wall of 0.93 shear span ratio was shear failure,shear wall of 1.24?1.52 shear span ratio was bending shear failure,shear wall of 1.8 shear span ratio has bending shear failure features and signs of bending failure,shear wall of 1.8 shear span ratio showed the characteristic of bending failure;(3)The greater the shear wall's shear span ratio was,the smaller yield ratio was,the more ultimate displacement and displacement ductility coefficient were big,the better the ductility was,but the bearing capacity was lower.So suitable shear span ratio should be chosen according the actual working condition when the Structure design was done.