구조시스템에 대한 부구조계 유사동적 실험 기법 개발

Abstract

Recently, the frequency and magnitude of earthquakes are increasing worldwide. In case of Korea, this region had categorized as seismic safety zone. But small to medium magnitude earthquakes were steady occurred. And frequency of earthquake also shows steady increment. Especially, recent earthquake related 5.8 magnitude earthquake in Gyeongju has increased the interest of related researchers and the general public. As an evaluation method for the inelastic response of the structure, the analytical model is developed and calibrated by using experimental results. The developed analytical model is used to predict the inelastic response of the structure. Therefore, accurate and efficient testing methods are important to accurately evaluate the inelastic response of a structure to seismic loads. The existing test methods for analysis inelastic behavior of structure are quasi-static, pseudo-dynamic and shaking table tests. Quasi-static test is easy to apply to test device and test. But this method cannot consider dynamic effect. On the other hand, shaking table test can satisfy dynamic effect and have high accuracy. But that is very expensive for applying the testing system. And test specimen is also takes high cost to make. Moreover when scale-downed specimen by capacity of testing system, that makes decrease reliability of test results by scale-effect. Therefore, shaking table test is so complex and hard to test. Using quasi-static test system has economical advantage. Pseudo-dynamic test is applying displacement to real structure that calculated from numerical analysis program through connected loading test device. And calculate displacement again for next step using numerical analysis program applying measured restoring force after load. But all of the pseudo-dynamic tests in Korea perfectly dependent on foreign technology and also there are no adequate researches. Therefore, in this paper, the main purpose is to build a system for pseudo dynamic online test system and to evaluate its consistency. In order to verify the consistency of pseudo dynamic test, we tested the case of with and without compensation method for the steel specimen, it is confirmed that the system can be reconciled when the with compensation is applied to the test. Finally, similar dynamic tests were carried out using steel specimens and panel dampers. In the case of a steel damper, the structure is constructed as a physical part, and the rest is applied to a numerical analysis model to evaluate the response of a structure to a seismic load.