Nonlinear Analysis And Research Of Complex Shear-Wall Without Moulding Board

With the Implementation of wall marerial and architecture energy conservation standards, Architecture that trend price and capacity matching ,low dissipation energy and good bearing capacity is inevitable.Basing on ductility shear wall conception,A new residential structure system—slitty shear wall without demoulding of RC is bringed forward by our team. It aims at substituting the traditional building system of brick construction. The shear walls not only have the good capability of resisting earthquake, but also overcome the shortcomings of traditional shear wall, such as low energy conservation, the large self-weight and stiffness,and it kept the traditional construct craftwork.All indicated that it can apply in city and town widely.Slitty shear wall is a kind of new construction,whether can it satisfy with the require of bearing capacity ,anti-earthquake and energy conservation when wall changed more thiner and splitted? Reaseach about above question will be perfomed in this paper,it include:(1) Eleven small shear-span ratio shear wall with different parameter are eatablished,and simulation experimentation by monotone and iterative load are carried. the whole destroys process is observed, at the same time, load-displacement turn-round curve is obtained. Through the data, their properties including strength property, deformation property and energy property are studied. Speaking in detail, we studied the degree of the cracking load, yield load and failure load, recovery force model, stiffness degradation, dissipative coefficient and the property of ductility.(2) The axial experiment researched by ten slitty shear-wall with different shear-span ratio is done to test its complex reaction,and preliminary research about outer wall stability are carried.Basing on the experiment,Destroyed process and mechanism are analyzed by nonlinear simulation.The results indicate that small shear-span slitty shear small as a whole when it is in the elastic condition,it can be looked on a whole wall,Proper increasing axial pressure may not only improve primary stiffness and bearing ,but also ductility decreased little;Sliity shear wall are improved ductility and bearing by side role;Increasing shear-span can obviously meliorate shear-walL ductility when shear-span is small than one,although ductility can increase very faster by added shear-span ratio, bearing will fall very much;Cracking and destroyed load would be increased obviously by enhancing concrete strength,on the contrary,ductility is worse.Improving rebar ratio will increase limited bearing until invalidation,but it does nothing with primary load and stiffness.The axial experiment and nonlinear analysis showed that complex-slitty shear wall have excellent bearing before yield,and the time of destroying is long.its destroy modality just the same with destroyed by cutting,occured at the connect beam firstly,Complex slitty shear wall have good outer stability by displacement analysis.Research indicated that compex slitty shear wall with demolding board is provided with good bearing capacity and anti-earthquake,it can satisfy the bearing capacity demand of middle-small and high building, the energy conservation and heat insulation will be improved greatly.Research results about this system is supported by natural science foundation project of ShanXi Province(fund number: 2006011050), and it has applied successfully in experiment office of No.8 architecture company,ShanXi. So this system has a broad engineering utility value, market foreground is good.