Calculation Method Of Load Effect On Concrete Two-way Slab Line

Reinforced concrete two-way slab is one of the most widely used structural members in the housing construction,its safety and economy has a great impact on the building.In practical engineering,the mechanical behavior and design method of the bidirectional plate subjected to uniform load has been well established.However,research methods for two-way slab line load now has not formed complete theory system.Based on the engineering experience of designers,the common way to bear load is to increase the area of cross section and the amount of structural reinforcement.It is clear that such method has a very negative impact on the safety and engineering structure of the economy,therefore bidirectional board of line load has important significance analysis.In this paper,the general finite element analysis software ABAQUS is used to establish the basic calculation model for different span two-way slabs.The specific research contents are as follows(1)considered online load on the influence of different positions of two-way slab of slab span of maximum bending moment,and to form are given in the form of several line load layout in the equivalent uniformly distributed load,calculate the equivalent load coefficient K,as a reference for engineering design.For equivalent load coefficient K,the with equilateral two-way slab span and load the role position x exists relationship is as follows: when two-way slab span must,with the line load position by the edge of the plate to cross position change in,the value of K increases gradually;when the line load position is certain,with the increase of two-way slab span,K value is gradually increased.(2)discuss the influence factors of concrete two-way slab line load effect,including the length to width ratio,plate thickness and concrete strength grade of influence,the reinforced concrete plate under the action of load and internal force of concrete strength grade has nothing to do,and plate thickness has nothing to do,but the thickness of the plate on the deflection influence is bigger,the thickness of the plate more,deflection is small.The variation of the internal force of the line is influenced by the load position and the length and width ratio of the plate.On the basis of the above,the paper returns to the calculation formula of the maximum bending moment of the line load in the mid span,and the validity of the formula is verified by two kinds of finite element analysis software ABAQUS and ANSYS.(3).This paper also studies the structure of reinforcing the effectiveness of the two-way slab,Comparing the effect of reinforcing ribs and longitudinal plate thickness on the mechanical properties of the board,no significant contribution to the analysis of beam deflection plate of the conclusion.Furthermore gives the two-way slab setting stiffeners in plate and concealed coping design proposals,the online load of two-way slabs design more reasonable and economic.