가능최대지진(MCE)을 적용한 중력식 콘크리트 댐 내진성능평가 방안 개선
Improvement of Seismic Performance Evaluation Method of Gravity type Concrete Dam Applying Maximum Credible Earthquake(MCE)
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초록
이 논문의 목적은 MCE를 적용한 콘크리트 중력식 댐의 동적소성해석에 의한 내진성능평가 수행 시 입력변수, 성능수준 평가 방법에 대한 현행 기준의 적용성을 검토하고 개선안을 제시하는 것이다. 이를 위하여 국내 콘크리트 중력식 댐을 대상 시설로 선정하여 다양한 조건으로 동적소성해석을 수행하였으며 입력변수인 콘크리트 인장강도, 파괴에너지 등에 대한 적용성을 검토하였다. 중력식 댐체 저면의 균열이 활동의 안정성 미치는 영향을 분석하여 저수기능 확보에 필요한 성능수준 평가 방법의 개선안을 도출하였다. 연구 결과 개선사항을 적용할 경우 MCE를 적용한 현행 내진성능평가 방법보다 합리적인 평가결과를 도출하는 효과가 있을 것이다.
Abstract
The purpose of this paper is to review the applicability of the current standards for the evaluation method of input variables and performance level in seismic performance evaluation by dynamic plastic analysis of the concrete gravity-type dam to which MCE is applied, and to suggest improvements. To this end, a domestic concrete gravity-type dam was selected as a target facility, dynamic plasticity analysis was performed under various conditions, and applicability to input variables such as concrete tensile strength and breaking energy, was reviewed. By analyzing the effect of cracks at the bottom of the gravity dam on the stability of the activity, an improvement plan for the performance level evaluation method required to secure the water storage function was derived. If the proposed improvement plan is applied, it will have the effect of deriving more reasonable evaluation results than the current seismic performance evaluation method to which MCE is applied.
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