| 摘要 |
PROBLEM TO BE SOLVED: To provide a soundness diagnosing method of an existing concrete structure, that reflects the distribution of the dynamic characteristics value of the structure as a whole. SOLUTION: A plurality of ultrasonic sensors are arranged in the existing concrete structure, an ultrasonic wave propagation speed at each side wires of the ultrasonic sensors is calculated, and an ultrasonic wave propagation speed at each cell in a predetermined cross section is calculated from the ultrasonic wave propagation speed by a CT method (1); the dynamic elastic coefficient of concrete at each cell is calculated from the ultrasonic wave propagation speed to be converted to static elastic coefficient at each cell; and the estimate value of concrete compression strength at each cell is calculated from the static elastic coefficient and the load resistant force and deformation capacity in the predetermined cross section are calculated by using the dynamic elastic coefficients, static elastic coefficients and concrete compression strengths of all the cells (2), the processes of (1) and (2) are repeatedly performed for a plurality of cross sections (3), and the calculation values of the load resistant force and the deformation capacity calculated by the process (2) and designed load resistant force and planned deformation capacity are compared with each other at each predetermined cross section (4). COPYRIGHT: (C)2008,JPO&INPIT
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