Bài báo khoa học

Reinforced concrete beams are components that are widely used in civil and industrial construction. Normally, Reinforced concrete (RC) beams work practically in flat bending state; however, in some special cases it is subject to spatial bending (oblique bending). Currently, there are also many scientists in the world who have provided the design caculation methods to calculate for RC beams with many simple methods, but they only can use to cases offlat bending beams. To solve the problem ofstress-strain state ofRC beams under oblique bending, we can use the method of strength of materials. Otherwise, with plastic theory of RC, currently, we mainly can use finite element method for calculation. The finite element method has the disadvantage of complex calculations with many equations and many unknowns, depending on the analysis software. This article provides a simpler method of calculation, based on the balance of force and torque of the cross section, with this method, we can find the location of cracking, destructive location of the compression zone concrete, RC, from which offers design plans, reinforced arrangements for RC beams under oblique bending. This method can also be used to any structure and to any type of section. The authors have combined analysis theory with programming in Mathcad software to bring readers the simplest and most compact way.