| The prefabricated building has the prominent advantages of low cost and convenient construction,which can realize the transformation and upgrading of the construction industry and the goal of green and sustainable development.With the rapid development of new rural urbanization,housing conditions will gradually improve.The traditional rural housing system has a low intensity,which limits the quality of housing construction.Therefore,low-rise prefabricated buildings should be developed according to local conditions in rural construction.In this paper,we study the low-level prefabricated reinforced concrete level by slurry wall is composed of prefabricated concrete wall and cast-in-place edge artifacts,prefabricated panels for C30 concrete,adopting M7.5 sit slurry and cement mortar base or the connection of the floor slab,reserved on both sides and edges connecting the lap steel components,the edge components using cast-in-site C30 concrete,the construction method is simple and convenient construction and low cost,accord with prefabricated building structure and the method for construction of green environmental protection requirements.In this paper,the aseismic behavior of "one-shape" low-rise assembled reinforced concrete horizontal seat-grouting wall with different shear span ratio and wall thickness on six sides is studied by means of experiment and numerical simulation.The results show that:(1)cracks in specimens with a shear span ratio of 1.25(1800mm prefabricated wallboard)appear at the lower end of the edge member and gradually develop into cracks at the bottom of the specimen.There are relatively many cracks and good extension,and part of the concrete is crushed and detached.Under the repeated action of horizontal force,the failure mode is shown as bending failure.The specimens with a shear span ratio of 0.72(precast wallboard 3600mm)have a small crack expansion range,and most of them appear at the lower end of edge members.The failure mode is shear failure along the horizontal seam.When the shear span ratio was 0.5(5400mm),there were fewer cracks and they were concentrated at both ends of the root of the specimen.The concrete spayed at the corner and the failure was sudden.It was brittle failure,and the wall cracks could not be fully developed.(2)the specimen with a shear span ratio of 1.25 has a full hysteretic curve with good ductility and energy dissipation capacity.The specimens with a shear span ratio of 0.72 and 0.5 had higher bearing capacity,ductility and deformation capacity,and energy dissipation capacity was weaker than those with a shear span ratio of 1.25.(3)under the same shear span ratio,the change of specimen thickness has a certain impact on the seismic performance,but the impact is limited: the bearing capacity of the specimen at various stages increases with the increase of thickness,while the ductility and deformation capacity decreases with the increase of thickness.(4)the finite element software ABAQUS was used to conduct numerical simulation analysis on three pieces of low-rise assembled reinforced concrete horizontal sitting wall with different shear span ratios,and the numerical value and trend of load-displacement curve were compared.It was found that the simulation results were in good agreement with the experimental results. |
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