Seismic Performance Analysis Of Wooden Columns Of Huipai Ancient Architecture After Repair And Reinforcement

As one of the most important architectural schools in Chinese ancient architecture,Huizhou ancient architecture has great cultural value and economic value,and the Huizhou ancient architecture has good seismic performance due to its unique structural form.However,with the passage of time and various Under the influence of various natural disasters,different degrees of damage inevitably occur,which weakens the seismic performance of the wooden structure,and it is urgent to repair or replace the damaged parts of wooden components such as wooden columns.Therefore,finding an effective repair and reinforcement method will be one of the urgent issues to be solved in the field of ancient Huizhou architectural engineering.At present,there have been researches on the repair and reinforcement of ancient Huizhou wooden structures at home and abroad,but there are few studies on the seismic performance of wooden columns after repair and reinforcement,and most of them are single component studies,without considering the coupling effect between wooden components.Therefore,through the aseismic performance test of the wooden columns after beam-lifting repair of ancient Huizhou buildings,the single-story two-span wooden frame is taken as the research object,and the seismic performance of the wooden columns in the overall wooden frame under three different repair methods is studied,and the The finite element numerical analysis is carried out on it,the main research contents and results are as follows:(1)This paper expounds the historical and cultural value of Huizhou ancient buildings,summarizes the structural forms of Huizhou ancient buildings,the damaged form of wooden columns,and the way of reinforcement,and analyzes the research status at home and abroad.(2)Taking the "Dunmu Hall" in Xu Village,She County,Huangshan City,Anhui Province as the prototype,the dovetail tenon pier joint and the hand-made tenon pier joint reinforcement method are adopted,and two reinforcement methods are adopted: 200 mm from the bottom of the column and 1/4 column height(ie 450mm).Height,designed and manufactured a 3-story single-story two-span test model with a scale ratio of 1:2.72,and conducted physical and mechanical material property experiments on the Chinese fir used in the test timber frame according to relevant norms and standards,and obtained the water content and various strengths of the Chinese fir And the basic parameters such as elastic modulus provide the basis for the subsequent finite element analysis.(3)Low cycle reciprocating quasi-static tests were carried out on non-destructive wooden columns,dovetail-jointed wooden columns and tenon-jointed wooden columns.By studying the hysteretic curve,skeleton curve,stiffness degradation and energy dissipation capacity of wooden columns under three working conditions,the wooden columns under different working conditions were analyzed.Seismic performance in monolithic timber frames.The test results show that the two pier-joint reinforcement methods increase the bearing capacity and stiffness of the wooden column,and perform well in the overall timber frame,which verifies that the two pier-joint reinforcement methods are reasonable.At the same time,it is verified that wooden columns with different reinforcement heights can exert good reinforcement effects.Under the horizontal load parallel to the dovetail reinforcement interface,compared with the unidirectional dovetail reinforcement method,the cross-shaped tenon reinforcement method has a maximum bearing capacity of 1314 N and an increase of 55.5% under reverse loading,which shows that ten The reinforcement effect of zigzag tenon and tenon wooden columns is better.(4)The finite element analysis software is used to simulate the wooden columns under three different working conditions,and the obtained wooden column stress cloud diagram,hysteresis curve and skeleton curve are compared with the test data.The research shows that: according to the "contact + constraint" The calculation results of the designed finite element model are basically consistent with the test results,verifying the rationality and reliability of the finite element model,and explaining the feasibility of using hand-made tenon pier joints and dovetail tenon pier joint reinforcement methods for wooden columns in actual engineering applications.At the same time,it is verified that the wooden column with chashou tenon pier is better than dovetail tenon pier to strengthen the wooden column.Through the seismic performance test and finite element analysis of wooden columns of Huizhou ancient buildings after repair and reinforcement,the research results obtained can not only provide reference for the repair and reinforcement of wooden columns of Huizhou ancient buildings,but also provide reference for the repair of wooden columns in other types of wooden structures.Reinforcement provides reference.Figure [83] table [12] reference [70]...