抄録
According to results of material testing for existing concrete bridges, we found not only degradation of concrete strength but also large scattering in strength within a same member. In this research, firstly, we modeled strength distribution using the finite Fourier transform procedure based on limited number of sampling core testing. And then, we modeled the degradation curve of concrete and make up a methodology for identification of deterioration parameters involved based on core testing results and estimation of initial status of concrete by introducing a nonlinear programming procedure. Furthermore, we conducted sensitivity analysis of strength distribution on shear strength of concrete member by using the elasto-plastic finite element method and proposed an estimation equation of shear strength of concrete member taking strength distribution into consideration.
