축적 손상 이론에 의한 구조물의 지진 피해 평가

송종걸,이동근 대한토목학회 1992 대한토목학회 학술발표회 논문집 Vol.1992 No.1

지진하중에 대한 다경간 교량의 비탄성 변위응답 평가

송종걸,남왕현,정영화 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.A

To evaluate inelastic seismic reponses of multi-span bridge structures, the capacity spectrum method(CSM) incorporating the equivalent single-degree-of freedom(ESDOF) method is presented. Application of the CSM incorporating the ESDOF method is illustrated by example analysis for symmetric and asymmetric bridge structures. To investigate an accuracy of the CSM, the maximum displacements estimated by the CSM are compared to those by inelastic time history analysis for several artificial earthquakes. The results show that the CSM provided conservative estimates of the maximum displacements for the symmetric and asymmetric bridge structures, and the trend of conservative estimates of the asymmetric bridge structures was significantly larger than that of the symmetric bridge structure.

횡하중 분포와 등가단자유도 방법의 영향을 고려한 다경간 교량의 내진성능 평가

송종걸,남왕현,정영화 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B

To evaluate inelastic seismic responses of multi-span-bridge, the equivalent single-degree-of-freedom (ESDOF) methods and the lateral load distributions are applied to the capacity spectrum spectrum method(CSM). From the pushover analysis results using the four ESDOF methods and the six types lateral load distributions, the ESDOF method more than lateral load distribution is found to have an important influence upon the pushover analysis. The effects of the higher mode on the bridge seismic behaviors are also increased as the number of pier increase. Therefore, it can be concluded that lateral load distributions and ESDOF methods for reflection of higher mode effects should be considered in the seismic analysis of the bridge structural.

납-고무 받침에 의해 면진된 원전구조물의 응답에 대한 Bouc-Wen 모델 및 지진특성의 영향

송종걸,손민균 한국지진공학회 2017 한국지진공학회논문집 Vol.21 No.2

In order to modeling seismic isolation system such as lead-rubber bearing (LRB), bilinear model is widely used by many researchers. In general, an actual force-displacement relationship for LRB has a smooth hysteretic shape. So, Bouc-Wen model with smooth hysteretic shape represents more accurately actual hysteretic shape than bilinear model. In this study, seismic responses for seismically isolated nuclear power plant (NPP) with LRB modelled by Bouc-Wen and bilinear models are compared with those of NPP without seismic isolation system. To evaluate effect of earthquake characteristics for seismic responses of NPP isolated by LRB, 5 different site class earthquakes distinguished by Geomatrix 3rd Letter Site Classification and artificially generated earthquakes corresponding to standard design spectrum by Reg. Guide 1.60 are used as input earthquakes. From the seismic response results of seismically isolated NPP, it can be observed that maximum displacements of seismic isolation modelled by Bouc-Wen model are larger than those by bilinear model. Seismic responses of NPP with LRB is significantly reduced than those without LRB. This reduction effect for seismic responses of NPP subjected to Site A (rock) earthquakes is larger than that to Site E (soft soil) earthquakes.

등가단자유도 방법에 따른 다자유도 교량의 지진응답평가

송종걸,남왕현,정영화 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A

The capacity spectrum method(CSM) can be used for the evaluation of inelastic maximum response of structures and has been recently used in the seismic design using the incorporation of pushover analysis and response spectrum method. To efficiently evaluate seismic performance of multi-degree-of freedom(MDOF) bridge structures, it is important that the equivalent response of MDOF bridge structures should be calculated. To calculate the equivalent response of MDOF system, equivalent responses are obtained by using Song method, Fajfar method and Calvi method. Also, those responses are applied to CSM method and seismic performance of bridge according to the ESDOF method are compared and evaluated straightforwardly.

교량구조물의 비탄성변위응답 평가를 위한 연성도감소계수 산정식 제안

송종걸,김학수 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A

The main objective of this study was to derive a formula of ductility reduction factor, expressed as R_(μ). To attain this objective, a study comprised reduction factors computed for stiffness degrading systems undergoing different levels of ductility and to investigate an accuracy of the formula. Based on this study, the main conclusions can be summarized :(1) The ductility reduction factor is primarily affected by the period of the system and the displacement ductility ratio. (2) The proposed formula is simpler and the inelastic deformations of bridge structures are better than those by the others formulas we used before.

횡하중 분포와 등가단자유도 방법의 영향을 고려한 다경간 교량의 내진성능 평가

송종걸,남왕현,정영화 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A

To evaluate inelastic seismic responses of multi-span-bridge, the equivalent single-degree-of-freedom (ESDOF) methods and the lateral load distributions are applied to the capacity spectrum method(CSM). From the pushover analysis results using the four ESDOF methods and the six types lateral load distributions, the ESDOF method more than lateral load distribution is found to have an important influence upon the pushover analysis. The effects of the higher mode on the bridge seismic behaviors are also increased as the number of pier increase. Therefore, it can be concluded that lateral load distributions and ESDOF methods for reflection of higher mode effects should be considered in the seismic analysis of the bridge structural.

교량구조물의 비탄성변위응답 평가를 위한 연성도감소계수 산정식 제안

송종걸,김학수 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B

The main objective of this study was to derive a formula of ductility reduction factor, expressed as R_(μ). To attain this objective, a study comprised reduction factors computed for stiffness degrading systems undergoing different levels of ductility and to investigate an accuracy of the formula. Based on this study, the main conclusions can be summarized :(1) The ductility reduction factor is primarily affected by the period of the system and the displacement ductility ratio. (2) The proposed formula is simpler and the inelastic deformations of bridge structures are better than those by the others formulas we used before.

무선센서네트워크 환경의 웹기반 교량모니터링 시스템

송종걸,김학수,정영화,이상우,남왕현,장동휘,Song, Jong-Keol,Jin, He-Shou,Chung, Yeong-Hwa,Lee, Sang-Woo,Nam, Wang-Hyun,Jang, Dong-Hui 한국방재학회 2008 한국방재학회논문집 Vol.8 No.5

무선센서네트워크 환경의 웹기반(web-based) 교량모니터링시스템을 갖추기 위하여 무선통신을 기반으로 디지털 초소형센서와 마이크로 프로세싱, 데이터 취합 및 관리를 위한 데이터베이스, 각종 제어 프로그램, 인터넷 데이터 전송 프로세서를 기본적으로 구축하여 무선으로 수신된 데이터를 수집하고 분석하였다. 그리고 이러한 교량모니터링 시스템의 적용성을 검증을 위하여 동일조건에서 유선방식과 무선방식으로 실험을 병행 수행한 후 각각의 계측결과들을 비교하였다. 비교한 결과 유선으로 계측한 결과와 무선으로 계측한 값은 유사하지만 무선센서의 통신과정에서 데이터의 손실이 발생하는 것으로 나타났다. 또한 실내실험과 현장실험을 통하여 본 연구의 효율성과 적용성을 검증하였다. In this study, to establish a web-based bridge monitoring system with wireless sensor network environment, we constructed microminiaturized sensor based wireless communication techniques and micro processing, databases for data combination and administration, variable control programs and processors for transferring data by internet. Then those data are measured and analyzed by the constructed bridge monitoring system with wireless sensors. To evaluate the practicability of the bridge monitoring system with wireless sensor, we compared the values measured in the tests with wire sensor under same conditions. The results show that the trend of the data obtained from the monitoring systems with wire sensors and wireless sensors was very similar but the some lost data in the communication process with wireless sensor network environment. And through laboratory and field tests, the effectiveness and the applicability of the proposed methods were verified.

등가선형 및 비선형 납-고무받침 모델을 이용한 면진된 원전구조물의 지진응답의 비교

송종걸,이진희 한국지진공학회 2015 한국지진공학회논문집 Vol.19 No.1

In order to perform a soil-isolation-structure interaction analysis of seismically isolated nuclear power plant (NPP) structures, the nonlinear behavior of a seismic isolation system may be converted to an equivalent linear model used in frequency domain analysis. Seismic responses for seismically isolated NPP containment structures subjected to a simple artificial acceleration history and different site class earthquakes are evaluated for the equivalent-linear and nonlinear models that have been applied to lead-rubber bearing (LRB) modeling. It can be observed that the maximum displacements of the equivalent linear model are larger than that of the nonlinear model. From the floor response spectrum analysis for the top of NPP containment structures, it can be observed that the spectral acceleration of an equivalent linear model at about 0.5 Hz frequency is about 2~3 times larger than that of a nonlinear model.