| The commonly used infilled walls in prefabricated buildings include blocks,strip plates and precast concrete non load-bearing wall panels.The traditional infilled wall has the advantages of energy conservation,environmental protection and high construction efficiency,but it also has the problems of easy cracking and poor construction quality.Based on this,a new type of fabricated lattice wallboard is proposed in this paper.The appearance of prefabricated lattice wallboard not only saves energy,but also has the advantages of light weight,stable structure and good elasticity.In this paper,the compression performance of this kind of fabricated lattice wall panel under axial load is studied by means of experimental research and numerical simulation.The correctness of the model is verified by comparing the experimental and simulation results.At the same time,the parametric analysis of the ultimate bearing capacity of fabricated lattice wall panel is carried out,and the effects of eccentricity,reinforcement ratio and concrete strength on the bearing capacity of the specimen are analyzed,It lays a foundation for the popularization and application of fabricated lattice wallboard.The main work and conclusions of this paper are as follows:1.The compressive performance tests of six full-scale fabricated lattice internal partition boards with two groups（double rib and three rib）concrete surface thickness of20 mm,30mm and 50 mm respectively under vertical axial load are carried out,and the mechanical performance,failure process,failure form,deformation performance and bearing capacity of fabricated lattice internal partition boards under axial load are analyzed.The ultimate failure forms of specimens are mainly large deformation failure and axial compression failure of concrete surface.The results show that the thicker the concrete surface is,the higher the bearing capacity is;Under the same surface thickness,the bearing capacity of three rib wallboard is higher than that of double rib wallboard,indicating that the rib has a certain contribution to the bearing capacity of wallboard;The theoretical calculation of the ultimate bearing capacity of the specimen is carried out.The theoretical calculation results are close to the test values,and the theoretical formula has certain accuracy.2.ABAQUS is used to simulate the compression performance of fabricated lattice wall panel under vertical axial load,and the cracking load,ultimate bearing capacity and maximum vertical displacement of each specimen model are obtained.The results show that the position of stress concentration of fabricated lattice internal partition wall is related to the thickness of concrete surface and structural form,and the test value of each specimen is not different from the simulation value,which verifies the correctness and rationality of the model3.Using ABAQUS,the ultimate bearing capacity of prefabricated lattice light internal partition wall is parametrically analyzed,and the effects of eccentricity,concrete strength and reinforcement ratio on its ultimate bearing capacity are analyzed.The ultimate bearing capacity decreases with the increase of eccentricity;The reinforcement ratio of longitudinal reinforcement is directly proportional to the ultimate bearing capacity within a certain range,and the ultimate bearing capacity increases gradually with the increase of reinforcement ratio;The ultimate bearing capacity increases with the increase of concrete strength,which shows a linear change trend and has a great impact.At the same time,the concrete strength has a certain impact on the vertical deformation capacity of the wall.Fig.[52] table [13] Ref.[59]... |
