Shaking Table Experimental Study On High Ductility Concrete Reinforced Masonry Structure

All previous earthquake damage results show that the tensile shear strength of masonry structure is low,collapsed brittleness destruction under earthquake is easily happened,to our country caused great casualties and property losses.Therefore,on how to improve the ability to resist collapse of masonry structure and improve the seismic performance of masonry structure is of great significance for research..High ductile concrete(HDC)is a new structural material with high toughness,high crack resistance,high durability and high resistance to damage the ability,especially it is able to with multiple fractures and strain hardening characteristics under tension together shear loads.Its superior mechanical properties can effectively improve the ability of the seismic bearing capacity and deformation of structures.So the research adopts the method of HDC surface reinforced masonry structure is put forward,this article has carried on the HDC materials and both brick masonry is the research on bonding performance and HDC reinforced masonry building model shaking table test research,the main contents are as follows:(1)HDC materials with different working conditions,through the existing brick masonry walls are binding experiment research,consider different sampling location,factors such as age,whether to use interface agent,respectively to study the influences of various factors on the surface bond strength.(2)In this paper,a village on the second floor brick street shops as the prototype,in the literature,57,58,based on the literature of the damage model by HDC surface strengthening and carries on the shaking table test for the third time.Through model under the action of the different intensity and seismic damage process,the dynamic characteristics of structure,the analysis of the displacement response and acceleration response,further study of the HDC surface strengthening methods,to improve seismic behavior of masonry structure.(3)After comparing different strengthening methods to reinforce model structure under the same intensity and seismic damage situation,dynamic characteristics,acceleration and displacement reaction,with the destruction of the macro phenomenon and quantitative comparison between test data of HDC surface strengthening method of masonry structure building reinforcement effect.(4)Respectively from two aspects of shear bearing capacity and deformation between the layers of HDC strengthening brick houses,opening model for seismic performance analysis,to evaluate HDC surface strengthening method of masonry structure.(5)The results showed that HDC surface and brick wall has good bonding properties,can ensure the effective delivery of HDC surface shear,to improve the integrity of the structure;With high ductility concrete reinforcement method can significantly increase the seismic bearing capacity and deformation capacity of masonry structure,improve the brittleness of masonry structure,Compared with steel mesh cement mortar strengthening method,high ductility of reinforced concrete model structure of small displacement between the same seismic action,the stiffness degradation is slow,light,seismic performance is more superior,and the site less wet operation,simple construction,short construction period,small damage to the wall,has better application prospects.After HDC reinforcement of villages and towns street two-story brick houses shops can realize our country 9 degrees to flame elastic seismic fortified area goals and objectives.