합리적인 터널설계정수 산정을 위한 역해석 프로그램 개발 (Development of a back analysis program for reasonable derivation of tunnel design parameters)
| Author(s): |
Young-Joon Kim
Yong-Joo Lee |
|---|---|
| Medium: | journal article |
| Language(s): | Korean |
| Published in: | Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집), 2013, n. 3, v. 15 |
| Page(s): | 357-373 |
| DOI: | 10.9711/ktaj.2013.15.3.357 |
| Abstract: | In this paper, a back analysis program for analyzing the behavior of tunnel-ground system and evaluating the material properties and tunnel design parameters was developed. This program was designed to be able to implement the back analysis of underground structure by combination of using FLAC and optimized algorithm as direct method. In particular, Rosenbrock method which is able to do direct search without obtaining differential coefficient was adopted for the back analysis algorithm among optimization methods. This back analysis program was applied to the site to evaluate the design parameters. The back analysis was carried out using field measurement results from 5 sites. In the course of back analysis, nonlinear regression analysis was carried out to identify the optimum function of the measured ground displacement. Exponential function and fractional function were used for the regression analysis and total displacement calculated by optimum function was used as the back analysis input data. As a result, displacement recalculated through the back analysis using measured displacement of the structure showed 4.5% of error factor comparing to the measured data. Hence, the program developed in this study proved to be effectively applicable to tunnel analysis. |
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10394743 - Published on:
04/01/2020 - Last updated on:
24/01/2020
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