Study On The Mechanical Properties Of Giant Concrete Transfer Beam With Opening

With the rapid development of China's economy and the improvement of people's living standard,people's demand for building function is getting higher and higher.As a result,it is more and more popular to apply the transfer structure in high-rise buildings.In the current,due to the phigh-rise building resence of a large number of equipment and piping,ventilation pipe,in order to reduce the structural height,increase the floor height,in the conversion layer set up large holes in different parts of the beam.This paper mainly studies the stress mechanism of shear wall in different forms have different opening and transfer beam work together,through six different operating conditions,using finite element software ABAQUS established 31 finite element models were calculated and analyzed.(1)In full span shear wall under the condition of finite element analysis of the transfer beam without openings and different position openings 6 model.The results show that the opening of the portal on the transfer beam is most favorable to the structural stress.However,with the opening of the portal to the two ends of the beam,the internal stress of the transfer beam is more and more unfavorable to the structure.Therefore,it is suggested that the opening should be arranged in the Ln/2 section of the transfer beam.(2)In the non full span shear wall under the condition of five groups were established 25 models for finite element analysis on the transfer of the beam end openings on the distribution and influence of stress transfer structure.The results of the study show that,at the junction of transfer beam and shear wall will produce great pressure and shear stress,especially shear wall and the end of the transfer beam hole at the junction of the shear wall at the bottom of the pressure and shear stress will increase accordingly.Therefore,in the design of the structure,the end of the wall should be reinforced or the addition of dark columns,plus the flange method to improve its pressure and shear capacity.(3)Six groups of 31 through the established finite element model,the calculation results were compared and analyzed,find out the transfer girder stress of thin soft link.The results show that there will be a serious stress concentration phenomenon at the edge of the beam,especially at the corner of the portal,and the shear stress will appear in the hb range of both ends of the beam.Therefore,in the design of structure,should be in the mouth of the cave and on both sides of the concealed columns,at the end of the transfer beam arrangement to ensure sufficient stirrups shear capacity of beam.Finally,according to the results of finite element analysis,discusses the design method of transfer girder section,and the structure is summarized,some design suggestions are put forward for the engineering design of the structure of transfer.