Research On Split Design Method Of Composite Floor Slab Considering Mold Optimization

Composite floor slab is one of the important horizontal components of prefabricated building,which is made of precast slab and cast-in-place concrete layer.It has the advantages of saving formwork,high surface flatness,controllable quality and reducing on-site pollution.As one of the key links in the design of composite slab,split design needs to comprehensively consider the project characteristics,transportation size limit,general bottom mold size of prefabricated component manufacturer,cast-in-place joint width between slabs,pipeline density and other factors to determine the floor prefabrication area and precast slab size.In this paper,aiming at the problems of the diversification of precast slab specifications and the low universality of the mold,the research on the optimization method of the split design and the mold design of the composite floor slab is carried out:1.Theoretical research on the optimal design of composite floor slab splitting.The basic principle of split design of composite floor slab is clarified.Combined with external commands and external applications,a program design process based on Revit is summarized.This paper expounds the basic framework of axiomatic design theory,the matrix equation of design axiom and the one-way conversion method between coupled design,quasi coupled design and uncoupled design,and puts forward a set of design optimization ideas of composite floor slab splitting based on axiomatic design theory,which provides theoretical support for subsequent program development.2.Develop the design optimization system of composite floor slab splitting.Compared with PKPM-PC,the design optimization system of composite floor slab can reduce the types of prefabricated components by adding the function of quick splitting design of automatic judgment of unidirectional double composite floor slab,the function of design parameter adjustment suggestion of merging precast slab types,and the function of automatic generation and export of precast slab list.The results show that the system is better than pkpm-pc,which is mainly reflected in the reduction of 50.0% of the precast slab specification and 37.5% of the mold types.3.Test the design optimization system of composite floor slab splitting.By establishing the BIM model of Yidong resettlement house 5 building and production auxiliary building,the feasibility of split design optimization system of composite floor slab is tested,and compared with PKPM-PC split design results: the split design optimization system of composite floor slab can reduce the precast slab specification by10.0% and the total amount by 5.6% of resettlement house,precast slab specification by14.3% and the type of mould by 18.8% of auxiliary building respectively.4.Put forward the optimization design method of composite floor slab mold.Combined with the design characteristics,basic requirements and material properties of composite floor slab mold,the general side mold accumulation method and the general side mold combination method are proposed to optimize the design of composite floor slab mold.Compared with the traditional design method,the mold optimization rate of the auxiliary building is 23.4% and 50.5% respectively,while that of the residential building is43.4% and 80.2% respectively.Based on the secondary development technology of Revit,the basic principles of split design and axiomatic design theory,this paper realizes the split optimization design of composite floor slab,and effectively reduces the prefabricated component specifications and mold types of different projects.Combined with the characteristics of mold design,the combined variable composite floor slab mold is studied,which improves the reuse rate of mold and lays a foundation for the popularization and application of laminated plate.