Lateral Performance Of Chuan-Dou Type Timber Frame With Wood Panel Infill

As a significant symbol of Chinese civilization,the traditional wooden structure has invested great enthusiasm and attention to the traditional Chinese wooden structure.Important breakthroughs and accumulations have been made in the mechanical mechanisms,mechanical properties and reinforcement techniques of traditional Chinese wood structures,but the structure of with walls embedded in the timber frame and the interaction mechanism between the frame and the wall are barely discussed.At the same time,post-earthquake investigations and preliminary exploratory studies have suggested that the embedded wall has an important influence on the lateral performance of traditional wood structures.Therefore,clarifying the interaction mechanism of wood frame-wall and its anti-side performance is the necessary basis for rational evaluation of the performance of traditional Chinese wood structure.This paper takes the Chuan-dou type wooden structure in southwestern China as the research object,Through the static and cyclic tests of the 15 Chuan-dou type frames with wood panel infill,the damage development process,failure mode and the rotation of the panel were observed.Through analysis of ultimate capacity,stiffness,ductility,stiffness degradation,energy consumption,etc.,the main conclusions are as follows:(1)The lateral stiffness and capacity of the Chuan-Dou type frame are low,but the embedded wood panel wall can greatly increase ultimate capacity and stiffness of the timber frame.(2)Frame with wood panels infill has good deformation ability;While the layer displacement angle reached 1/5,except for the obvious yielding of the frame with wood panel horizontally infill,the load-displacement curves of the specimens continued to rise,and none of them showed obvious damage characteristics.(3)The direction panel arranged in the wood panel wall has different influence on the lateral performance of the wall.The panel with horizontally arranged wood wall has higher stiffness,and the vertically arranged has higher bearing capacity and ductility.(4)Window opening in the wall made the force transmission in the wall more complicated,and the bearing capacity and stiffness reduced,and the larger the opening size,the greater the degree of weakening,the failure mode is due to the pullout of the lintel.(5)The width and thickness of panel and span have different effects on the lateral performance of the Chuan-dou type frame with wood panel infill.For example,the reduction of the width will increase the stiffness and energy consumption of the component.On the contrary,the increase of the width will cause the bearing capacity,stiffness and energy consumption of the wood panel wall to decrease;the reduction of the panel thickness reduced the out-of-plane stiffness of the wall,which results in out-ofplane buckling deformation,reducing bearing capacity and stiffness,but the increase in plate thickness has no significant effect on the side performance;And the bearing capacity and stiffness of the wood panel wall are positively proportional to the span.(6)The Chuan-dou type frame with wood panel infill has good seismic resistance and exhibits good seismic performance in terms of deformation capacity,energy consumption,strength and stiffness degradation.