Experimental study on seismic performance of ancient wooden structure considering earthquake damage and column foot damage
In order to analyze the influence of earthquake damage and column foot damage on the seismic behavior of ancient timber structures,three groups of flush gable roof(wooden frame without dougong)with a reduction ratio of 1∶2 are made with reference to Code of Engineering Practice of the Ministry of Industry in Qing Dynasty.The specimens are categorized into those with or without seismic damage,those with or without footing damage,and those with intact timber frames without seismic damage or footing damage.A single-point to two-point loading device suitable for space wooden structures is designed.The damage mode of wooden frames,load-displacement relationship,failure form and deformation capacity of mortise-tenon joints are analyzed through quasi-static tests.The results show that:the hysteresis curve of the wooden frame shows obvious pinch shrinkage and slip characteristics,and the mortise and tenon joints show semi-rigid characteristics.Seismic damage reduces the horizontal bearing capacity and stiffness of the wooden frame more obviously,and the structural deformation increases significantly;the column foot damage reduces the structural stiffness to a certain extent,but the effect is small,and there is no obvious effect on the structural deformation capacity.
ancient timber structureseismic behaviordamaged componentmalformation
NETL
NSTL
万方数据
