터널의 계측변위를 이용한 역해석기법에 관한 연구

Abstract

본 논문은 직접법으로 수행한 역해석결과를 제시하였다. 본 연구에서 개발한 역해석 기법은 최적화 기법에 가중치를 적용시켜 구하고자 하는 미지의 물성치를 얻을 수 있었다. 직접법의 장점은 복잡한 수학 방정식이 불필요하여 비선형 문제를 해결할 수 있어 실제현장에 적용가능하다. 그리고 유한차분법을 이용하여 정해석을 실시하였으며, 정해석으로부터 구한 변위를 계측변위로 하여 탄성계수와 초기응력을 대상으로 역해석을 실시한 결과 거의 정확한 값에 수렴하는 것을 확인할 수 있었다. 그리고 현장 계측데이타를 이용하여 역해석을 수행하여 타당한 물성치를 얻어 현장 적용성 검토도 확인하였다.

In this paper, the results of back analysis based on the direct method were presented. The presented approach to back analysis with the weighting function was based on an iterative procedure correcting trial value of unknown parameters by minimizing the error function. The advantage of the presented approach was that method might be non-linear back analysis problem without having to rely on a complex mathematical background. By the FDM analysis on the underground structure, the method derived the complete intial state of stress and Young's modulus from the measured displacements. The presented approach was applied to analysis a tunnelling, and the results were satisfactory.

In this paper, the results of back analysis based on the direct method were presented. The presented approach to back analysis with the weighting function was based on an iterative procedure correcting trial value of unknown parameters by minimizing the error function. The advantage of the presented approach was that method might be non-linear back analysis problem without having to rely on a complex mathematical background. By the FDM analysis on the underground structure, the method derived the complete intial state of stress and Young's modulus from the measured displacements. The presented approach was applied to analysis a tunnelling, and the results were satisfactory.