• 한국전산구조공학회논문집
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• 제25권2호
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• pp.149-154
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• 2012

도로교설계기준 내진설계편은 붕괴방지수준의 확보를 설계절차에 의해 규정하고 있는 반면 기능수행수준의 확보에 대한 요구사항은 명확하게 제시하고 있지 않다. 붕괴방지수준의 확보를 위해 기본적으로 제시된 설계방법은 응답수정계수를 사용하는 스펙트럼해석법으로, 기능수행수준은 설계과정에 적용되는 위험도계수와 응답수정계수에 의해 결정 되어진다. 위험도계수는 교량의 중요도에 따라 단순하게 적용할 수 있으나 중약진지역에서의 응답수정계수 적용은 설계조건에 따라 다른 결과를 갖게 된다. 이 연구에서는 중약진지역의 일반 도로교량을 대상으로 내진설계를 수행하여 기능수행수준의 결정과정을 검토하고, 이 결과를 토대로 기능수행수준의 확보와 관련하여 내진설계편에 보완해야 하는 사항을 제시하였다.

• 토지주택연구
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• 제8권3호
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• pp.181-187
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• 2017

To proactively respond to internal and external changes such as the recent demographic change and rising demand for diversified housing types, this study investigated the framed-structure free plan public house model proposed by the LH to look at the seismic performance of framed-structure apartment according to damper system use through non-linear analysis. The effectiveness thereof was also examined in terms of performance and economy. As a result, the proposed damper system application method to framed-structure free plan public house model was found to meet the performance requirements of the present earthquake-resistant design (KBC2016) and effective to apply to designs. The max response displacement and max response acceleration were compared based on the nonlinear analysis. As a result, the building with damper system showed better earthquake resistance performance than earthquake-resistant structure thanks to the damper system, although the base shear of earthquake-resistant system was reduced by 20% in design. The damper system is expected to help reduce building damage while ensuring excellent earthquake resistance performance. In addition, the framework quantities of earthquake-resistant structure and structure with damping system were compared. As a result, columns were found to reduce concrete amount by about 3.9% and rebar, by about 7.3%. Walls showed about 12.6% reduction in concrete and about 10.7% in rebar. In terms of cost, framework construction cost including formwork and foundation expenses was expected to drop by about 5~6%.

• 콘크리트학회지
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• 제7권3호
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• pp.41-47
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• 1995

• 한국디지털건축인테리어학회논문집
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• 제11권2호
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• pp.115-121
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• 2011

Occurrence of earthquakes have been increased all over the world and also, magnitude of earthquakes have been larger these days. Earthquake can be happened in Korea and is not a safe country any more. Many buildings are exposed at danger without any alternatives against earthquake in Korea. Among various kinds of buildings, school buildings are very important and urgent, because many students stays at school and young students have some difficulty to evacuate. Also, most existing school buildings in Korea were not designed considering earthquake resistant design codes. Thus, in this study, 3 types of braces were applied for seismic retrofits of existing school buildings using commercial structural analysis software and effective seismic retrofits were evaluated and discussed based on results by time history analysis.

• Earthquakes and Structures
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• 제13권4호
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• pp.365-375
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• 2017

Seismic risk management has two main technical aspects: to recommend the construction of high-performance buildings and other structures using earthquake-resistant designs or evaluate existing ones, and to prepare emergency plans using realistic seismic scenarios. An overview of seismic risk assessment methodologies in Croatia is provided with details regarding the components of the assessment procedures: hazard, vulnerability and exposure. For Croatia, hazard is presented with two maps and it is expressed in terms of the peak horizontal ground acceleration during an earthquake, with the return period of 95 or 475 years. A standard building typology catalogue for Croatia has not been prepared yet, but a database for the fourth largest city in Croatia is currently in its initial stage. Two methods for earthquake vulnerability assessment are applied and compared. The first is a relatively simple and fast analysis of potential seismic vulnerability proposed by Croatian researchers using damage index (DI) as a numerical value indicating the level of structural damage, while the second is the Macroseismic method.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1998년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Spring 1998
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• pp.103-112
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• 1998

The earthquake resistant design for roadway bridges introduced in 1992 is conducted according to the "Standard Specification for Roadway Bridges", Division V, Seismic Design and the first revision of the Standard was done in 1996. However, dur to different concepts of the earthquake resistant design from those of the other designs, the provisions given in the Standard are still not applied appropriately. In this paper the verification of the earthquake resistant capacity of a bridge with typical configurations, 5-span steel box girder bridge, is carried out based on the application rules of the present Standard in order to provide clear understandings about the earthquake resistant verification and the earthquake resistant design as well.n as well.

• 한국화재소방학회논문지
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• 제27권1호
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• pp.46-51
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• 2013

지진 발생 시 건물에 설치된 소방설비 주요 구성품의 내진성능을 평가할 수 있는 실험실에서 수행 가능한 Lab scale의 내진성능시험방법을 개발하기 위하여 지반응답해석방법과 전달함수 등을 바탕으로 한 등가선형해석이론을 적용하고자 하였다. 내진성능시험은 등가가속도에 의한 시험과 임의가속도에 의한 시험으로 나눠지는데, 등가가속도 시험은 등가선형해석에 의해 지진 규모에 따른 등가가속도를 적용하여 공진점을 찾거나 시험체의 이상 유무를 관찰하는 것이며, 임의가속도 시험은 순간적인 강진이 가해질 때를 모사한 것으로 가진주파수와 가진폭에 따라 가속도가 결정되며 기능수행여부 또는 물리적 손상 등을 확인할 수 있다. 본 연구에서 개발한 시험방법을 수계소화설비 주요 구성품에 적용한 결과 특등급에 해당하는 강진 발생 시 기능수행여부를 확인할 수 있었으며, 이러한 시험방법을 통해 소방설비 구성품에 대한 내진성능을 검증할 수 있을 것으로 기대된다.

• Structural Engineering and Mechanics
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• 제53권2호
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• pp.227-248
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• 2015

A CFPBS (Cone-type Friction Pendulum Bearing System) was developed to control the acceleration delivered to a structure to prevent the damage and degradation of critical communication equipment during earthquakes. This study evaluated the isolation performance of the CFPBS by numerical analysis. The CFPBS was manufactured in the shape of a cone differenced with the existing FPS (Friction Pendulum System), and a pattern was engraved on the friction surface. The natural frequencies of the CFPBS were evaluated from a free-vibration test with a seismic isolator system consisting of 4 CFPBS. To confirm the earthquake-resistant performance, a numerical analysis program was prepared using the equation of the CFPBS induced from the equations of motion. The equation reported by Tsai for the rolling-type seismic isolation bearings was proposed to design the equation of the CFPBS. Artificial seismic waves that satisfy the maximum earthquake scale of the Korean Building Code-Structural (KBC-2005) were created and verified to review the earthquake-resistant performance of the CFPBS by numerical analysis. The superstructural mass of the CFPBS and the skew angle of friction surface were considered for numerical analysis with El Centro NS, Kobe NS and artificial seismic waves. The CFPBS isolation performance evaluation was based on the numerical analysis results, and comparative analysis was performed between the results from numerical analysis and simplified theoretical equation under the same conditions. The validity of numerical analysis was verified from the shaking table test.

• Earthquakes and Structures
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• 제14권6호
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• pp.493-503
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• 2018

With the further increase of span length, the cable-stayed bridge tends to be more slender, and becomes more susceptible to the seismic action. By taking a super long-span cable-stayed bridge with main span of 1400m as example, structural response of the bridge under the E1 horizontal and vertical seismic excitations is investigated numerically by the multimode seismic response spectrum and time-history analysis respectively, the seismic behavior and also the effect of structural nonlinearity on the seismic response of super long-span cable-stayed bridge are revealed. Furthermore, the effect of structural parameters including the girder depth and width, the tower structural style, the tower height-to-span ratio, the side-tomain span ratio, the auxiliary piers in side spans and the anchorage system of stay cables etc on the seismic performance of super long-span cable-stayed bridge is investigated numerically by the multimode seismic response spectrum analysis, and the favorable earthquake-resistant structural system of super long-span cable-stayed bridge is proposed.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2006년도 학술발표회 논문집
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• pp.276-283
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• 2006

Korea is considered to be immune from the earthquake hazard because it is located far away from the active fault. However, recent earthquake caused a loss of lives and economical loss worldwide. Hence there has been raised an importance of the earthquake resistant design for various infrastructures. In this research, the seismic design and evaluation criterion for RC bridge pier were proposed from the experimental results of 82 circular RC bridge piers tested in domestic and aboard. New seismic criterion was introduced the limited ductile design provision suitable to Korean peninsula, which would be classified as a low or moderate seismic region. In addition, further important topic for the seismic safety of RC bridge piers in Korea is the seismic performance enhancement of RC bridge piers, which were designed and constructed before the 1992 seismic design provision. Therefore, the proposed seismic performance evaluation criterion could be very useful to judge seismic retrofit need or not according to the residual seismic performance of the RC bridge piers. Also, it could reduce an uncertainty for the safety of the infrastructure under earthquakes.