| The whole welded steel truss is embed in the concrete called the reinforced concrete beam with steel truss.It has a certain advantage compared with the solid web steel reinforced concrete beam. To enhance the cohesive force between the steel and concrete,the solid-web component is need to set the stud.To the reinforced concrete beam with steel,because the steel truss of chord and CHS strengthens the bond between steel and concrete,it doesn’t have to set the stud.Steel truss is able to withstand the load.When the project is limit to build templates under construction,The templates can be directly supported on steel truss.It can solve the problem of construction.In this paper,we mainly undertook the following work.1. Establish the finite element mechanical model of the reinforced concrete beam with steel truss through ABAQUS.Compared with experimental results to prove its rationally. And this thesis change the area of the oblique abdominal rod to discuss the influence on ultimate bearing capacity.According to the results of finite element analysis, This paper put forward the coefficient of area increases of the oblique abdominal rod.And compared with the existing experimental data to prove its rationality.2. Derive the formula about the secondary stress flexural of ultimate bearing capacity formula. And this thesis discuss the effect of initial stress,the steel ratio, reinforcement ratio and section height on the ultimate flexural bearing capacity. The calculation results reveal that degree of decline of ultimate flexural bearing capacity is proportional to initial stress and steel ratio.it is inversely proportional to the reinforcement ratio and section height.3. Build finite element model of secondary stress through unit passivation and active technology in application of ABAQUS and verify above established rationally.4. Calculate and analysis secondary stress problem on reinforced concrete beam with steel truss through a engineering example. |
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