Study On Shear Resistance And Fire Resistance Of Fabricated Sandwich Wall And Floor

With the rapid development of assembled building,it is more urgent to understand the performance of assembled building components.This paper will introduce the mechanical properties of prefabricated wallboard and floor slab under load,and the fire resistance test analysis of two kinds of panels.The main contents and results are as follows:(1)Prefabricated reinforced concrete structures are closely matched with each other and have good shear resistance,and can be used as load-bearing walls in building construction.During the test,the test data and phenomena show the shear resistance of sandwich panels,and can highlight its weaknesses,such as: the joints between the wall and other components are the easiest.First,destruction occurs,which requires the attention of the workers.(2)Study on fire resistance of prefabricated self-insulating wall slab with steel wire mesh frame cement,the time for the specimen to maintain fire resistance and fire insulation during the fire resistance test,the end of the test,and the integrity of the specimen were observed.During the experiment,there was no phenomenon mentioned in the specification,that is,the integrity of the slab met the requirements of the specification.No damage.(3)Through the bending test of sandwich concrete slab with steel grid frame,the mechanical deformation performance and failure characteristics of its normal section under load are explored,the weak position is found,the treatment scheme is put forward and the mechanical performance of sandwich slab is analyzed by calculation.(4)Fire resistance and thermal insulation performance of sandwich floor,after the end of the experiment,data and phenomena analysis,in the specified time,the floor deflection and temperature changes meet the requirements of the code.That is to say,it is a good attempt to develop new composite wall materials in China.