Research On The Performance Of Bolt-connected Assembled Beamed Narrow Width Ribbed Wall Panels

In recent years,prefabricated building has the advantages of low resource consumption,effective control of carbon emissions and improving building energy efficiency,which accords with the development concept of "green building" and has received extensive attention and promotion.The research and development of prefabricated concrete structure with simple connection method,good comprehensive performance,quality assurance and high efficiency has become the premise to promote the development of prefabricated buildings.The bolt-connected assembled beamed narrow width ribbed wall panels structure is introduced,which is easy to connect and assembles with high strength bolts and cushion plates without grouting.It is a completely dry connected prefabricated wall panel structure.The structure mainly has the advantages of non-wet operation at the construction site,convenient transportation and hoisting,flexible building layout design,simple opening of doors and windows,convenient disassembly and recycling,and so on.However,its bearing capacity,lateral stiffness and failure mode are not clear.In this paper,performance of the wall panel is studied by means of quasi-static test and finite element simulation.The work and main results are as follows:(1)In this paper,the research status of bolted prefabricated shear wall structure at home and abroad was combed and summarized,and the problems in the existing research are summarized and analyzed.the purpose and significance of the research on the performance of bolted prefabricated beam narrow ribbed wall panels are expounded.(2)A simple connection mode of joints and a variety of ribbed wallboards were designed and fabricated,and the quasi-static tests were carried out under low cyclic loading.The test results showed that the final failure mode of the wallboard specimen is that the concrete on both sides of the wall panel was damaged under compression,and the concrete under the bolted joint was damaged,and the horizontal cracks and oblique cracks were carried out on both sides of the wall panel.the cracks were mainly concentrated near the corner joints and bolted joints;The hysteresis curve of the wallboard was obviously pinched;The elastic stiffness of the wallboard specimen was more than 3 k N/mm at the initial stage of loading,and the stiffness degradation mainly occurs before the yield of the specimen,and slowed down after loading to the yield of the specimen;The displacement ductility coefficient of the specimen under positive and negative loading is greater than 1.4,and the energy dissipation coefficient is greater than 0.3.(3)The Abaqus finite element fine model of bolt-connected assembled beamed narrow width ribbed wall panels structure was established,and the numerical simulation results were compared with the experimental results.The stiffness of theoretical calculation,test results and numerical simulation results were compared,and the parameters of the skeleton curve for numerical simulation were established.