Abstract
This paper shows the analytical method for strain softening using a one-dimensional element (the truss element and beam element). In numerical analysis considered the tension softening, we can obtain excellent results by using the plane element, when the bending moment or the axis force acts on the beam member. However, if the one-dimensional element can be used instead of the plane element, the cost of calculation or making data is reduced. Therefore, we proposed the analytical method, and showed the simulation of the fracture of the plain concrete and lightly reinforced concrete beams. Their results are in good agreement with the experimental ones.
