• Title, Summary, Keyword: Seismic performance evaluation

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Seismic-Performance Evaluation for Existing Railway Bridges (기존 철도 교량의 내진성능 평가)

  • 임남형;강영종;양재성;엄주환
    • Proceedings of the KSR Conference
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    • pp.422-427
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    • 1999
  • This is the basic study on the evaluation of seismic performance for existing railway bridges. This study presents all evaluation items and a progressive method of seismic performance for existing railway bridges. In the evaluation of seismic performance, a two-stage is used. Firstly, according to the seismic performance evaluation categories, preliminary screening of bridges is recommended. And using tile seismic rating system, seismic rank of bridges is calculated. Secondly, for the selected bridges in the first stage, detailed evaluation is recommended.

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State of Practice of Performance-Based Seismic Design in Korea

  • Lee, Dong-Hun;Kim, Taejin;Kim, Jong-Ho;Kang, Dae-Eon
    • International Journal of High-Rise Buildings
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    • v.1 no.3
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    • pp.195-201
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    • 2012
  • Today, a great effort to develop PBSD procedure to be utilized in Korea is given by domestic structural engineers, academics, and governmental organizations. After Great East Japan Earthquake (2011) took place, lots of clients in Korea became to concern of their buildings so that requests of seismic performance evaluation and seismic rehabilitation for existing buildings have been gradually increased. Such interests in seismic events initiated a rapid development of a series of guidelines for seismic performance evaluation and seismic performance enhancement. For new buildings, however, design guidelines for PBSD are yet well prepared in Korea and prescriptive design methods are dominant design procedure still. Herein, seismicity demands used in seismic performance evaluation and some important design parameters in NLRH are introduced. Some project examples for seismic performance evaluation and rehabilitation applying passive energy dissipation devices are also described in the latter part of paper.

Effect of Uncertain N-values to Seismic Performance Evaluation of Underground Structures (불확실한 지반의 N값이 지중구조물의 내진성능평가에 미치는 영향)

  • Park, Ji-hwan;Lee, Tea-hyung
    • Journal of the Society of Disaster Information
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    • v.6 no.2
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    • pp.45-65
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    • 2010
  • There has been tighten up the need of seismic retrofit about 31 public facilites since published "Korean Earthquake Damage Prevention Law". Therefore, seismic studies have been developed and enforced the studies. Measuring dynamic stiffness of subsurface materials influence on seismic performance evaluation to build up seismic retrofit. The soil dynamic properties for seismic performance evaluation are N-value from using SPT(standard penetration test), dynamic shear elastic modulus and dynamic deformation modulus using laboratory tests. The most unscientific element in ground dynamic properties involved uncertainties is obviously N-value using SPT. This study shows that effect of N-value included natural and artificial uncertainties to seismic performance evaluation of ground structures is not only approached probabilistic analysis using FOSM method and tornado diagram, but also review how to spread effect of seismic performance evaluation of ground structures.

Study of Seismic Resistance Performance Evaluation Method for Existing Mid-Low Story RC Structure Buildings by Applying Fuzzy Theory (퍼지이론을 적용한 기존 중저층 철근콘크리트 건축물의 내진성능평가기법 연구)

  • Kim, Dong-Hee;Kim, Hyun-Su
    • Journal of the Korean Association for Spatial Structures
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    • v.17 no.2
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    • pp.53-62
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    • 2017
  • This study aims to establish a seismic resistance performance evaluation method that makes sure to secure the seismic resistance performance of the existing mid-low story reinforced concrete structures. This study focuses on the development of the seismic resistance performance evaluation method for the overall seismic resistance performance evaluation on the buildings by applying fuzzy theory. This seismic resistance performance evaluation method considers the mutual relations among the type of force, the type of member, the type of story, and the states of deterioration of the buildings. The total seismic resistance performance index from this method was calculated by the intensity weight of each evaluation item, fuzzy measure, fuzzy integration. Moreover, the evaluation methodology was established in this study to identify the performance level of the Immediate Occupancy, Life Safe, Collapse Prevention by applying the fuzzy theory.

Evaluation of the Seismic Performance of Existing Building Structures (기존 철근콘크리트 건축물의 내진성능 평가)

  • 우운택
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.239-244
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    • 2000
  • The necessity of the seismic performance evaluation of existing building structures is raised through the Taiwan earthquake in 1999. In this study, the methods of seismic performance evaluation of existing building structures in U.S.A. and Japan were reviewed, applied them to the three-story office building structures in Seoul. It is found out that it is possible to establish the seismic performance evaluation index of RC structure which meet Korean seismic code. Also it is concluded that if sufficient experimental and analytical data could be obtained, a reliable index for the evaluation of seismic performance of existing structures should be established in Korea.

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Seismic Performance Evaluation of School Building Short Column Effect (끼움벽과 단주효과를 고려한 학교건축물의 내진성능평가)

  • Ju, Chang-Gil;Han, Ju-Yeon;Park, Tae-Won
    • The Journal of Korean Institute of Educational Facilities
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    • v.21 no.2
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    • pp.33-39
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    • 2014
  • In the case of low-rise buildings in seismic performance evaluation, lateral force resistance of the pillars affects the seismic performance of the building. Evaluation of the seismic performance of the column is determined by the holding performance is evaluated by comparing the shear strength and bending strength it was destroyed bylow intensity. In case of the school building, in order to install the large windows for ventilation and lighting of the partition walls are located between the pillars. The case of the pillars of these, shear failure occurs in the event of an earthquake is often, in the seismic performance evaluation, partition wall and the wall of the shim is evaluated ignoring, pillar of the general pillars If you have to calculate the results of the seismic performance distorted that are destroyed by bending behavior can be evaluated as often. Results of the study, when assessed by distinguishing the effective length of the column, it was found that when a seismic load is applied, it is possible to accurately predict the failure mode, reliable results of seismic performance evaluation of the school building.

A Study on Evaluation Method of Seismic Performance on Cut and Cover Tunnel of Subway in Japan (일본 도시철도 개착식 터널의 내진성능 평가 방법에 대한 고찰)

  • Park, Beom-Ho;Lee, Woo-Chul;Kim, Jin-Ho;Lim, Ham-Hyoung
    • Proceedings of the KSR Conference
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    • pp.15-19
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    • 2009
  • Due to the Japan's Kobe earthquake in 1995, a cut-and-cover tunnel, which is one of subway facilities, collapsed unexpectedly. As a result, also in Korea, seismic performance needs to be secured for the cut-and-cover tunnel and currently, the subway seismic design standard is based on the seismic performance. However, there is no standard for the damage level or stability level of a member for securing the seismic performance, and the definition of multi-level seismic performance is not sufficient. By contrast to this situation, in the Japan's evaluation method of seismic performance, design earthquake ground motion having reflected there into the subway driving stability is clearly defined and the seismic performance required for structures is classified in detail. This study analyzes the Japan's systematic evaluation method of seismic performance for cut-and-cover tunnels of subway.

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A Simple Procedure of Seismic Performance Evaluation for Unreinforced Masonry Buildings in Korea

  • Kim, Taewan
    • Architectural research
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    • v.15 no.3
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    • pp.159-166
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    • 2013
  • This study was aimed at analyzing the three-step seismic performance evaluation procedure of Korea Infrastructure Safety Cooperation and proposing a new procedure suitable for unreinforced masonry buildings in Korea. For the study, it was investigated the performance evaluation results of five example URM buildings. First of all, it was found that the performance evaluation procedure for the URM buildings should be different from that for the other structural systems. As a result, a simple procedure of seismic performance evaluation was proposed, which includes elimination of elastic and inelastic push-over analysis and reduction of performance levels and evaluation steps. With the simple procedure, the URM buildings could be evaluated more easily than the other structures. It would be expected that the procedure can provide structural engineers with a simple and easy way to evaluate the seismic performance of the Korean URM buildings. Nevertheless, the procedure must be revised continuously by reflecting new research products for the URM buildings in Korea.

Proposed Seismic Performance Evaluation Enhancement for Existing School Building (기존 학교 건축물의 내진성능평가 및 보강방안 제안)

  • Hwang, Ji-Hoon;Jang, Jeong-Hyun;Yang, Kyeong-Seok;Choi, Jae-Hyouk
    • The Journal of Korean Institute of Educational Facilities
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    • v.19 no.4
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    • pp.29-38
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    • 2012
  • Recently large scale earthquake s are occurred around the world following the damage of buildings. So the interest of preparing for earthquake seismic design and seismic performance has becoming high. School buildings are though used for educational purpose; they are also used as emergency shelter for local residents during earthquake disaster. However, the current seismic design ratio of our country (Korea) is 3.7% and if massive earthquake is occurred it follows a serious damage. In order to overcome this situation, seismic performance evaluation is carried out for existing school building and an accurate and appropriate seismic retrofit is required based on performance evaluation to upgrade the existing school buildings. In this paper, nonlinear static analysis on existing school buildings for ATC-40 and FEMA-356 are carried out using the capacity spectrum method to evaluate seismic performance and to determine the need for retrofitting. In addition, after reinforcement to verify the effect of retrofit enhance the seismic performance is applied the seismic performance evaluation is carried out to verify the effect of seismic retrofit time history analysis using nonlinear dynamic analysis is also performed and nonlinear behavior of earthquake load of seismic retrofit of structures was also investigated.

Seismic Performance Evaluation According to Rotation Capacity of Connections for Intermediate Steel Moment Frames - I. Performance Evaluation (접합부 회전성능에 따른 중간 철골 모멘트 골조의 내진 성능 평가 - I 성능평가)

  • Moon, Ki Hoon;Han, Sang Whan;Ha, Seung Jin
    • Journal of the Earthquake Engineering Society of Korea
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    • v.18 no.2
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    • pp.95-103
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    • 2014
  • The current AISC341-10 standard specifiesa value of 0.02 radian for the minimum rotation capacity of connections for the intermediate steel moment frame system. However, despite of the advances realized in the domains of performance evaluation method and analysis method, research onthe minimum rotation capacity of the intermediate steel moment frame systemsatisfying the seismic performance has not been conducted in detail. In this study, the intermediate moment frame systemisdesigned with respect to current standards and the seismic performance in accordance with the rotational capacity of connections is evaluated using the seismic performance evaluation method presented in FEMA-P695. The minimum rotation capacity of intermediate steel moment frames required to satisfy seismic performance as well as the major design values affecting the seismic performance of moment frame areestimated. To that goal, the design parameters are selected and various target frames are designed. The analysis models of the main nonlinear elements are also developed for evaluating seismic performance. The resultsshow that the 20-story structure doesnot meet the seismic performance even if it satisfies the rotation capacity of 0.02 radian.