Journal of The Earthquake Engineering Society of Korea最新文献_第10页

Seismic Performance Evaluation of Non-Seismic Reinforced Concrete Buildings Strengthened by Perimeter Steel Moment Frame 周缘钢框架加固无震钢筋混凝土建筑抗震性能评价

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-09-30 DOI: 10.5000/eesk.2020.24.5.233

Seonwoong Kim

{"title":"Seismic Performance Evaluation of Non-Seismic Reinforced Concrete Buildings Strengthened by Perimeter Steel Moment Frame","authors":"Seonwoong Kim","doi":"10.5000/eesk.2020.24.5.233","DOIUrl":"https://doi.org/10.5000/eesk.2020.24.5.233","url":null,"abstract":"This paper is to investigate the retrofitting effect for a non-seismic reinforced concrete frame strengthened by perimeter steel moment frames with indirect integrity, which ameliorates the problems of the direct integrity method. To achieve this, first, full-scale tests were conducted to address the structural behavior of a two-story non-seismic reinforced concrete frame and a strengthened frame. The non-seismic frame showed a maximum strength of 185 kN because the flexural-shear failure at the bottom end of columns on the first floor was governed, and shear cracks were concentrated at the beam-column joints on the second floor. The strengthened frame possessed a maximum strength of 338 kN, which is more than 1.8 times that of the non-seismic specimen. A considerable decrease in the quantity of cracks for the strengthened frame was observed compared with the non-seismic frame, while there was the obvious appearance of the failure pattern due to the shear crack. The lateral-resisting capacity for the non-seismic bare frame and the strengthened frame may be determined per the specified shear strength of the reinforced columns in accordance with the distance to a critical section. The effective depth of the column may be referred to as the longitudinal length from the border between the column and the foundation. The lateral-resisting capacity for the non-seismic bare frame and the strengthened frame may be reasonably determined per the specified shear strength of the reinforced columns in accordance with the distance to a critical section. The effective depth of the column may be referred to as the longitudinal length from the border between the column and the foundation. The proposed method had an error of about 2.2% for the non-seismic details and about 4.4% for the strengthened frame based on the closed results versus the experimental results.","PeriodicalId":372168,"journal":{"name":"Journal of The Earthquake Engineering Society of Korea","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129330149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Overview on Standards for Liquefaction Triggering Evaluation using the Simplified Method 简化液化触发评价标准综述

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-09-30 DOI: 10.5000/eesk.2020.24.5.197

Yeon-Jun Kim, Ko Kil-Wan, Manandharsatish, Kim Byungmin, Dong‐Soo Kim

{"title":"Overview on Standards for Liquefaction Triggering Evaluation using the Simplified Method","authors":"Yeon-Jun Kim, Ko Kil-Wan, Manandharsatish, Kim Byungmin, Dong‐Soo Kim","doi":"10.5000/eesk.2020.24.5.197","DOIUrl":"https://doi.org/10.5000/eesk.2020.24.5.197","url":null,"abstract":"Evidence of liquefaction during the 2017 Pohang earthquake has highlighted the urgent need to evaluate the current seismic design standard for liquefaction in Korea, particularly the liquefaction triggering standard. With the simplified method, which is the most popular method for evaluating liquefaction triggering, the factor of safety for liquefaction triggering is calculated via the cyclic stress ratio (CSR) and the cyclic resistance ratio (CRR). The parameters in the CSR and CRR have undergone changes over time based on new research findings and lessons learned from liquefaction case-histories. Hence, the current design standard for liquefaction triggering evaluation in Korea should also reflect these changes to achieve seismic safety during future earthquakes. In this study, liquefaction susceptibility criteria were discussed initially and this was followed by a review of the current liquefaction triggering codes/guidelines in other countries and Korea. Next, the parameters associated with the CSR such as the maximum ground acceleration, stress reduction factor, magnitude scaling factor, and overburden correction factor were discussed in detail. Then, the evaluation of the CRR using the SPT N-value and CPT qc-value was elaborated along with overburden and clean-sand correction factors. Based on this review of liquefaction triggering evaluation standards, recommendations are made for improving the current seismic design standard related to liquefaction triggering in Korea.","PeriodicalId":372168,"journal":{"name":"Journal of The Earthquake Engineering Society of Korea","volume":"2000 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128281274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement of the Performance Based Seismic Design Method of Cable Supported Bridges with Resilient-Friction Base Isolation Systems (I- Analysis of Field Testing of Cable Supported Bridge) 基于性能的弹性摩擦隔震索桥抗震设计方法的改进(I——索桥现场试验分析)

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-06-30 DOI: 10.5000/eesk.2020.24.4.157

H. Gil, Sun Kyu Park, Kyoungbong Han, W. S. Yoon

{"title":"Improvement of the Performance Based Seismic Design Method of Cable Supported Bridges with Resilient-Friction Base Isolation Systems (I- Analysis of Field Testing of Cable Supported Bridge)","authors":"H. Gil, Sun Kyu Park, Kyoungbong Han, W. S. Yoon","doi":"10.5000/eesk.2020.24.4.157","DOIUrl":"https://doi.org/10.5000/eesk.2020.24.4.157","url":null,"abstract":"In this study, a field bridge test was conducted to find the dynamic properties of cable supported bridges with resilient-friction base isolation systems (R-FBI). Various ambient vibration tests were performed to estimate dynamic properties of a test bridge using trucks in a non-transportation state before opening of the bridge and by ordinary traffic loadings about one year later after opening of the bridge. The dynamic properties found from the results of the tests were compared with an analysis model. From the result of the ambient vibration tests of the cable supported bridge with R-FBI, it was confirmed that the dynamic properties were sensitive to the stiffness of the R-FBI in the bridge, and the seismic analysis model of the test bridge using the effective stiffness of the R-FBI was insufficient for reflecting the dynamic behavior of the bridge. In the case of cable supported bridges, the seismic design must follow the “Korean Highway Bridge Design Code (Limit State Design) for Cable supported bridges.” Therefore, in order to reflect the actual behavior characteristics of the R-FBI installed on cable-supported bridges, an improved seismic design procedure should be proposed.","PeriodicalId":372168,"journal":{"name":"Journal of The Earthquake Engineering Society of Korea","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121183065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Testing of RC Corner Beam-column Joints under Bidirectional Loading 双向荷载作用下RC转角梁柱节点试验研究

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-06-30 DOI: 10.5000/eesk.2020.24.4.189

S. Han, Y. Chang, C. Lee

引用次数: 0

Improvement of the Performance Based Seismic Design Method of Cable Supported Bridges with Resilient-Friction Base Isolation Systems (II-Proposal for the Seismic Design Procedure) 基于性能的弹摩基础隔震索桥抗震设计方法改进(ii)——抗震设计程序建议

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-06-30 DOI: 10.5000/eesk.2020.24.4.169

H. Gil, Sun Kyu Park, Kyoungbong Han, W. S. Yoon

{"title":"Improvement of the Performance Based Seismic Design Method of Cable Supported Bridges with Resilient-Friction Base Isolation Systems (II-Proposal for the Seismic Design Procedure)","authors":"H. Gil, Sun Kyu Park, Kyoungbong Han, W. S. Yoon","doi":"10.5000/eesk.2020.24.4.169","DOIUrl":"https://doi.org/10.5000/eesk.2020.24.4.169","url":null,"abstract":"In a previous paper, ambient vibration tests were conducted on a cable stayed bridge with resilient-friction base isolation systems (R-FBI) to extract the dynamic characteristics of the bridge and compare the results with a seismic analysis model. In this paper, a nonlinear seismic analysis model was established for analysis of the bridge to compare the difference in seismic responses between nonlinear time history analysis and multi-mode spectral analysis methods in the seismic design phase of cable supported bridges. Through these studies, it was confirmed that the seismic design procedures of the “Korean Highway Bridge Design Code (Limit State Design) for Cable Supported Bridges” is not suitable for cable supported bridges installed with R-FBI. Therefore, to reflect the actual dynamic characteristics of the R-FBI installed on cable-supported bridges, an improved seismic design procedure is proposed that applies the seismic analysis method differently depending on the seismic isolation effect of the R-FBI for each seismic performance level.","PeriodicalId":372168,"journal":{"name":"Journal of The Earthquake Engineering Society of Korea","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126506949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation of Floor Response Spectra Considering Coupling Effect ofPrimary and Secondary System 考虑主次系统耦合效应的楼板响应谱生成

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-06-30 DOI: 10.5000/eesk.2020.24.4.179

S. Cho, Abhinav Gupta

{"title":"Generation of Floor Response Spectra Considering Coupling Effect of\u0000Primary and Secondary System","authors":"S. Cho, Abhinav Gupta","doi":"10.5000/eesk.2020.24.4.179","DOIUrl":"https://doi.org/10.5000/eesk.2020.24.4.179","url":null,"abstract":"Seismic qualification of equipment including piping is performed by using floor response spectra (FRS) or in-structure response spectra (ISRS) as the earthquake input at the base of the equipment. The amplitude of the FRS may be noticeably reduced when obtained from coupling analysis because of interaction between the primary structure and the equipment. This paper introduces a method using a modal synthesis approach to generate the FRS in a coupled primary-secondary system that can avoid numerical instabilities or inaccuracies. The FRS were generated by considering the dynamic interaction that can occur at the interface between the supporting structure and the equipment. This study performed a numerical example analysis using a typical nuclear structure to investigate the coupling effect when generating the FRS. The study results show that the coupling analysis dominantly reduces the FRS and yields rational results. The modal synthesis approach is very practical to implement because it requires information on only a small number of dynamic characteristics of the primary and the secondary systems such as frequencies, modal participation factors, and mode shape ordinates at the locations where the FRS needs to be generated.","PeriodicalId":372168,"journal":{"name":"Journal of The Earthquake Engineering Society of Korea","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131609301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Experimental Performance Evaluation of Displacement Amplification Damping Systems Using Cables and Pulleys 缆索和滑轮位移放大阻尼系统的实验性能评价

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-05-30 DOI: 10.5000/eesk.2020.24.3.149

오진탁, 정인용, 류재호

引用次数: 0

Combination Procedure for Seismic Correlation Coefficient in Fragility Curves of Multiple Components 多分量易损性曲线中地震相关系数的组合方法

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-05-30 DOI: 10.5000/eesk.2020.24.3.141

Jung Han 김정한Kim, Si Young 김시영Kim, In-Kil 최인길Choi

{"title":"Combination Procedure for Seismic Correlation Coefficient in Fragility Curves of Multiple Components","authors":"Jung Han 김정한Kim, Si Young 김시영Kim, In-Kil 최인길Choi","doi":"10.5000/eesk.2020.24.3.141","DOIUrl":"https://doi.org/10.5000/eesk.2020.24.3.141","url":null,"abstract":"For the important safety system, two or more units of identical equipment or redundant components with similar function were installed to prevent abnormal failure. If the failure probability of such equipment is independent, this redundancy could increase the system safety remarkably. However, if the failure of each component is highly correlated by installing in a structure or experiencing an earthquake event, the expected redundancy effect will decrease. Therefore, the seismic correlation of the equipment should be evaluated quantitatively for the seismic probabilistic safety assessment. The correlation effect can be explained in the procedure of constructing fragility curves. In this study, several methodologies to quantify the seismic correlation in the failure probability calculation for multiple components were reviewed and two possible ways considering the realistic situation were selected. Simple examples were tested to check the applicability of these methods. The conversion method between these two methods was suggested to render the evaluation using the advantages of each method possible.","PeriodicalId":372168,"journal":{"name":"Journal of The Earthquake Engineering Society of Korea","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128933265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Seismic Response Amplification Factors of Nuclear Power Plants for Seismic Performance Evaluation of Structures and Equipment due to High-frequency Earthquakes 高频地震下核电厂结构与设备抗震性能评价的地震反应放大系数

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-05-30 DOI: 10.5000/eesk.2020.24.3.123

Seung-Hyun 임승현Eem, In-Kil 최인길Choi, B. 전법규Jeon, Shinyoung 곽신영Kwag

{"title":"Seismic Response Amplification Factors of Nuclear Power Plants for Seismic Performance Evaluation of Structures and Equipment due to High-frequency Earthquakes","authors":"Seung-Hyun 임승현Eem, In-Kil 최인길Choi, B. 전법규Jeon, Shinyoung 곽신영Kwag","doi":"10.5000/eesk.2020.24.3.123","DOIUrl":"https://doi.org/10.5000/eesk.2020.24.3.123","url":null,"abstract":"Analysis of the 2016 Gyeongju earthquake and the 2017 Pohang earthquake showed the characteristics of a typical high-frequency earthquake with many high-frequency components, short time strong motion duration, and large peak ground acceleration relative to the magnitude of the earthquake. Domestic nuclear power plants were designed and evaluated based on NRC's Regulatory Guide 1.60 design response spectrum, which had a great deal of energy in the low-frequency range. Therefore, nuclear power plants should carry out seismic verification and seismic performance evaluation of systems, structures, and components by reflecting the domestic characteristics of earthquakes. In this study, high-frequency amplification factors that can be used for seismic verification and seismic performance evaluation of nuclear power plant systems, structures, and equipment were analyzed. In order to analyze the high-frequency amplification factor, five sets of seismic time history were generated, which were matched with the uniform hazard response spectrum to reflect the characteristics of domestic earthquake motion. The nuclear power plant was subjected to seismic analysis for the construction of the Korean standard nuclear power plant, OPR1000, which is a reactor building, an auxiliary building assembly, a component cooling water heat exchanger building, and an essential service water building. Based on the results of the seismic analysis, a high-frequency amplification factor was derived upon the calculation of the floor response spectrum of the important locations of nuclear power plants. The high-frequency amplification factor can be effectively used for the seismic verification and seismic performance evaluation of electric equipment which are sensitive to high-frequency earthquakes.","PeriodicalId":372168,"journal":{"name":"Journal of The Earthquake Engineering Society of Korea","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129738121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Approximate Analysis for Shear Force Amplification Effect in Ordinary RC Shear Walls 普通RC剪力墙剪力放大效应的近似分析

Journal of The Earthquake Engineering Society of Korea Pub Date : 2020-05-30 DOI: 10.5000/eesk.2020.24.3.129

S. Jeon, Ji-Hun Park

引用次数: 1