Analytical manner and its record media null of reinforced concrete

摘要

PROBLEM TO BE SOLVED: To execute an analysis by the finite element method by creating an element stiffness matrix, calculating load and displacement, and performing calculation using an equivalent stiffness expression as the stiffness in the thickness direction, when calculating element distortion and element stress. ;SOLUTION: When a reinforced concrete member is modeled into a flat surface element for a two-dimensional analysis, equivalent stiffness in the thickness direction is defined from the balancing expression of the stress of a reinforcing bar and concrete in a direction such that it crosses the flat plane element orthogonally, an element stiffness matrix is created using it, load and displacement are calculated, and equivalent stiffness is used as stiffness in a thickness direction also, when calculating element distortion and element stress for calculation, thus enabling a two-dimensional planar element to be modeled for eliminating labor, specifying the ratio of the reinforcing bar and a breakdown point in the thickness direction for reproducing strength and deformation according to the amount of reinforcing bar for each site, and hence obtaining an accurate calculation result which is close to a three-dimensional analysis.;COPYRIGHT: (C)1999,JPO