Beton mukavemetinin kirişlerin yapısal performansı üzerindeki etkisinin değerlendirilmesi ve simülasyonu

The tensile strength of concrete as it in less ability to resist the tension stress formed by the external loading, the increasing of the concrete strength can enhance the capability of the tension zone in the cross section to handle the effect of the tension stress for more upper limits without reaching the cracking section state. The study aimed to build effective analysis of the scope of increasing the strength of concrete to rise the internal strength of the tension region. The study took the effect of the width of beam, the height of the beam, and the reinforcement area into account then evaluated each parameter percent of impact. The height of the section showed the bigger impact percent so that the study derived equations based of the effect of the height F(h) on the strength index which referred to the compressive strength of concrete divided by the square of the load for concentrated load case and by the square of the distributed loading for uniform loading case. The study then modified the equation for various width of beam values to get F(h), b then for various span length values to get F(h),b,h. the study used the two cases loading (concentrated load and uniform loading to examine the possibility of the derived equation for each case to show the close to actual state of cracked load and cracked uniform loading based on various heights and widths of the RC beam. The strength index for the two cases was examined after the processing the equation by building many charts including curve fitting techniques. The strength of concrete was examined fro range 30 to 50 MPa, the study explained the results by the derived formulas and by the working stress steps with low differences indicating the applicability of the new equations to improve the decision making for increasing the strength of the concrete under specific conditions of the RC dimensions. The study built 3d images simulation using ANSYS program. The stress on the cross section for Fc in the mentioned range was investigated according the safety factor values