Experimental Study On Seismic Behavior Of A New Type Of Filled Wall With Chuan-dou Style Wood

Chinese traditional wood structure is mainly divided into two categories: beam-lifting type and bucket-piercing type,which is mainly distributed in the north of China.Bucket-piercing wood structure has become the main form of wood-structure dwellings in southern China because of its light and simple structural layout.After previous earthquakes,it is found that the bucket-type wooden structure house has the characteristics of regular earthquake damage,such as tenon,tenon,tenon pull-out,excessive slip of column foot and large lateral displacement of the structure.among them,the wall stiffness is too large,which directly causes the whole face to collapse,resulting in secondary damage and the increase of maintenance costs in the later stage is particularly serious.There are some similarities between the beam-lifting wood structure and the through-bucket wood structure,but the research on the through-bucket wood structure is not enough.from the force transfer mechanism of the mortise and tenon connection form,it can be concluded that the mortise and tenon joint is a special semi-rigid joint,which can effectively reduce the overall stiffness of the structure,increase its ductility level,and the structure ductility is large.However,due to the large stiffness of the wall,the seismic performance of the bucket wood structure is not satisfactory.In order to further study the anti-seismic mechanism,seismic performance and the main factors affecting the anti-seismic performance of bucket-piercing wood structure,this paper determines the size of wood frame specimen through field investigation and consulting literature,in order to be more consistent with the reality.Taking the newly built wooden structure residence in Feixianguan Ya’an as an example,the 1:2 scale model is selected for experimental study.Through the horizontal low cycle reciprocating load test of a bucket wood modified filled wall frame,the load-displacement hysteretic curve of the bucket-type wooden frame,the moment-rotation curve of the joint and the mechanical characteristics of the bucket-type wooden frame under horizontal load are obtained.The main conclusions are as follows:(1)the simplified construction technology of wall partition is developed,which is suitable for bucket wood structure.This technology can provide reference for the seismic research and development of bucket wood filled walls.(2)A 1:2 ruler and a filled wall specimen are built by means of horizontal or vertical zoning.The low-cycle repeated loading tests of the specimens and empty frame specimens are carried out,and the crack development,damage mechanism,energy dissipation mode and so on of the wall are analyzed.After the test,it is found that the seismic performance of the piercing wood filled wall is obviously improved after the application of the zoning technology,and the new simplified construction frame filled wall specimen has stable seismic performance,low damage characteristics and good out-of-plane anti-collapse performance.