New-type PKG Composite Slab Finalization And In-plane Seismic Numerical Modeling Of Composite Floor Slab

Assembled monolithic structures are constantly being favored by the construction industry due to their efficient construction and good overall force performance.As an important force component in the structural system,laminated floor slabs can bear vertical loads,transmit horizontal loads,and strengthen buildings.The role of overall stiffness.At this stage,the PKG laminated board basically adopts a rectangular rib prefabricated bottom plate.When used for a large span,the deflection caused by the weight of the component is large,which is not conducive to the force of the laminated board and does not meet the reliability requirements of the component.The new PKG laminated board is based on the earlier stage of the research group Research and the application of existing laminated slabs adopt an innovative structure and reasonable force laminated floor.Floor slabs in areas with high seismic intensity are prone to in-plane shearing due to uneven boundary constraints.Research on the seismic performance of laminated slabs has important engineering practical value for the entire prefabricated structure and the safety of people and properties in the building space.Based on this article,the new T-shaped rib prefabricated bottom plate and laminated slab are tested and finite element analysis.The main work and results are as follows:(1)Calculate and derive the ultimate bearing capacity,deformation,pre-stress loss,etc.of the new PKG prefabricated base plate according to the section equivalent stress method,and finalize the analysis to determine the size and specifications of the T-ribbed prefabricated base plate under different spans;based on the laminated plate Orthogonal anisotropy characteristics,using elasto-plastic analysis method to carry out theoretical analysis on the new PKG two-way laminated plate,providing theoretical basis for subsequent experiments and finite element analysis.(2)The static load test of 4 unidirectional laminated panels was carried out to compare and study the mechanical performance of the members under different rib forms.The analysis showed that the mechanical properties of the laminated panels were greatly affected by the form of the ribs of the bottom plate.Under the same span,The force performance of the laminated plate of the T-shaped rib is better than that of the rectangular rib,and the laminated plate of the two types of ribs is damaged by bending and has good ductility performance.(3)Using ABAQUS finite element software based on the plastic damage model,6 prefabricated base plates,6 two-way laminated slabs and 1 two-way cast-in-place slab models were respectively established for simulation calculation,and the composite slab concrete was judged by the distribution of tensile damage factor DAMAGET In the development of cracks,the force mechanism of each component is analyzed,and its deflection,strain,etc.are studied;the simulation results are compared with the test,and the two are basically consistent,and the relative error of the deflection value under the ultimate load is about 10%.(4)On the basis of verifying the reliability of the finite element analysis by comparison with the experiment,the low-cycle repeated load simulation was performed on 6 two-way slabs with a size of 2m × 2m,and the mechanical performance of the cast-in-place and laminated slabs under seismic loads were compared and analyzed.,The hysteresis curve and skeleton curve of the component are obtained,and the stiffness and ductility of the component under dynamic load are analyzed,which can provide a certain reference for the subsequent research of PKG laminated slab.