연결제진을 이용한 기존 비정형 구조물의 내진보강

Abstract

Recently, the magnitude and frequency of earthquake is getting increased all over the world. Specially, in Sichuan of China, Haiti, Indonesia and etc, most structures that lack seismic design are damaged by the disasters followed by lose of human life. The awareness of the importance of using seismic design to structure has been significantly increases. The Korean peninsula has been considered as a relatively safe region to earthquake. However, small to medium magnitude earthquakes have been occurred and the seismic frequency as well as the magnitude is getting increased. As a result, our country and the neighboring countries government as well as different non-governmental agencies are taking in to consideration the past experience of earthquake damage and are taking majors. Because of this the seismic design criteria and seismic standard is continuously revised. It is applied for existing structures to enhance the seismic performance based on US-seismic design method and Japanese limit state design methods. Based on these two methods of seismic performance evaluation criteria, here it is dealt with a typical structure. In addition, as it is practiced in many parts of the world, the case studies on seismic design structures to meet the performance requirement though damage was discovered. For example, the damage of two structures by collision and expansion at expansion joint during earthquake has been reported. This report was based on the seismic resistance design of each building connected by expansion joint and during earthquake damages around joint either collision or expansion is occurred. This study focused on the Japanese seismic performance evaluation using capacity spectrum method was conducted for a typical structure and a nonlinear time history analysis for two structures connected by expansion joint, first the seismic performance of the two structures are evaluated separately and with inducing dampers then the effect of expansion joint during earthquake is investigated.