| Infilled wall frame structure is widely used in civil building,because of its economical and flexible layout.Infilled walls serve as non-structural components,which play the role of separation and maintenance causing serious influence to seismic performance of the overall structure.Infilled wall frame structure was badly damaged due to the poor ductility and bearing capacity of the wall material,as well as ignoring of the connection between the wall and the frame.Out-of-plane failure of infilled walls caused loss of life and property.Thus,improving the seismic performance of infilled wall frame structure needs to be addressed.Yang Chao put forward a kind of assembly AAC masonry infilled wall,which was in combination with production capacity and demand of the assembly industry development,and carried out the seismic performance test of 3 pieces of 1:2 scale infilled walls.In order to further study on problems of Infilled wall frame structure,expanding the number of working conditions,reducing the size effect,the paper based on ABAQUS carries out finite element simulation of the kind of assembly AAC masonry infilled wall which was put forward by Yang Chao.Seismic performance of assembly AAC masonry infilled wall is studied,and analysis of factors affecting and design schemes of seismic performance are given in the paper.The main work of the paper is as follows:(1)Based on extensive literature,a summary about the research status of test and numerical simulation on assembly AAC masonry infilled wall is made.Learning the method of ABAQUS,the finite element model is built by the method of simplified separation and reasonable parameter selection.(2)Comparison and analysis of the experimental and calculated values are given to verify rationality of the finite element model of assembly AAC masonry infilled wall.Firstly,the experimental and calculated values of the scale specimen are compared,and then the calculated values of the scale specimen and the full scale specimen are compared.(3)Finite element analysis of full size specimen is given to analyse the influence factors of the seismic performance of the AAC masonry infilled wall,including the thickness ratio of the wall,the ratio of reinforcement of the wall,the connection mode between the infilled wall and the frame,and the strength grade of the masonry.The results show as follows: As the thickness ratio of the infilled wall decreases,the out ou plane bearing capacity and displacement can be greatly improved,and the thickness ratio of the infilled wall should not be less than 10,which is prone to brittle failure.The reinforcement ratio of the infilled wall is approximately proportional to the bearing capacity and displacement of the wall,and the property reinforcement ratio of infilled wall is between 0.05% and 0.2%.Different card slot connectors which used in the paper between the infilled wall and the frame can maintain strong restraint strength andreasonable flexibility.When the reinforcement ratio is reasonable,the improvement of the masonry strength level of the infilled wall can effectively improve the outside plane bearing capacity and ductility of the wall.(4)The finite element simulation of seismic performance of AAC masonry infilled wall with hole opened is carried out.The results show that the hole has a certain weakening effect on the outside stiffness,but the wall basically keeps the deformation mode of simple supports at both ends.Due to the stress concentration at the entrance,the damage is serious,and strengthening measures are suggested.(5)Based on the result of seismic performance of the infilled wall,the quantitative analysis of the factors is given by fitting curves.The seismic performance of assembly AAC masonry infilled wall is evaluated,and the design scheme of assembly AAC masonry infilled wall is given under the seismic level of different intensification. |
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