Study On The Effect Of Baffle Assembled Monolithic Floor Slab Under Earthquake

Under seismic action,the floor should not only bear vertical load outside surface,and at the same time pass the horizontal seismic action to each component to resist lateral force,coordinate the deformation of frame and shear wall,but also bear the in-plane horizontal load,and the partition effect of the floor will affect the overall force of the building.In order to study the partition effect of the assembled monolithic slab,this paper uses the finite element analysis software MSC.Marc to conduct detailed finite element analysis on the assembled monolithic slab,and uses the structure analysis software ETABS to conduct the dynamic elastic-plastic time history analysis on the assembled monolithic slab frame shear wall structure.The in-plane mechanical properties of the assembled monolithic slab and the seismic performance of assembled monolithic slab frame shear structure are preliminarily discussed.The completed work and the main results obtained include:(1)According to the existing test results,set up the cast-in-place floor slab finite element model and the assembly monolithic slab finite element model respectively,on the basis of verifying the rationality of the finite element model,conduct the assembled monolithic slab parameter analysis,and study various parameters how to effect the in-plane mechanical performance of the assembled monolithic slab.(2)Change the strength of concrete;floor slab cast-in-place layer thickness;the strength and diameter of Bearing steel and perforated rebar,conduct cast-in-place floor slab and assembled monolithic slab finite element analysis under the condition with the different parameters,put forward the assembly monolithic slab rigidity and bearing capacity reduction coefficient calculation formula in the general case.(3)Use the structure analysis software ETABS program,combined with finite element analysis to get assembled monolithic slab rigidity and bearing capacity reduction factor,to establish cast-in-place floor slab frame shear wall structure and assembly monolithic slab frame shear wall structure model respectively,based on the structure of elastic response spectrum analysis and dynamic elastic-plastic time history analysis,to explore the assembled monolithic slab frame shear structure overall seismic performance.