Research And Application Of Narrow-width Flat Concrete Space Grid Box Structure

Single-span multistoried large-span orthogonal and diagonal cassette building structure is a new spatial structure system which is proposed by Academician Ma,the new floor is very crucial which stress is reasonable,the span is large,good economic performance,and have a wide range of applications in the industrial construction of large span.In this paper,the whole model proposed and single-span multistoried large-span orthogonal and diagonal floor for the use of SAP2000 calculation steps,which is showing the well comfort level,having great economic value and social benefits.Introduction in this paper first introduces the current development of large-span buildings at home and abroad,according to the needs of society,raises Ma Kejian academician vierendeel sandwich plate of the box structure system is put forward.The second chapter introduces the basic components of RC spatial grid cassette structures,and studies the basic mechanical properties of horizontal system-RC open-web sandwich plate floor and vertical system-grid frame wall,it provides the theoretical basis for practical engineering.The third chapter analyze and compare the mechanical properties and econo-technical target between the RC cassette structure with orthogonal-diagonal open-web sandwich plate floor and the conventional reinforced concrete frame structure by the static method,and make the static elastic-plastic analysis.The forth chapter do an analysis of the orthogonal-diagonal open-web sandwich plate concrete floor and compare the mechanical properties and economy,the floor systems meet the operating requirements specification,in saving cost,using function and attractive appearance have obvious advantages.The fifth chapter take the dynamic analysis on open-web sandwich plate structure,for open-web sandwich plate,considering the whole thickness,rib height,surface sheet thickness,mesh size on the natural frequency effect.Results showed that each of the parameters effect on the floor to some extent.The sixth chapter do the comfort analysis under three kinds of load acting for open-web sandwich plate,research shows that orthogonal-diagonal open-web sandwich plate floor meets the international comfort standards requirements.In the seventh chapter,it introduces the RC cassette structure with orthogonal-diagonal open-web sandwich plate floor in guizhou international tourist center application,the design of the reinforcement,the deflection,the results show that the RC cassette structure can be used as the optimum structure of large span concrete structure.Study shows that the orthogonal-diagonal open-web sandwich plate floor can not only satisfy the comfort evaluation of each index can meet the construction requirements,the box has good mechanical properties and superior economic performance.