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건축구조물의 내진성능향상을 위한 Disc Spring Braces 개발
박병태(Park Byung-Tae),권기혁(Kwan Ki-Hyuk),김형준(Kim Hyung-Joon) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
A DSB (Disc Spring Brace) was developed to avoid brittle failure at beam-column connections and to induce plastic hinges at the beam sections. Its structural performance was verified experimentally. Test results show that the DSBs prevent buckling response and residual deformations and their structural capacity can be adjusted according to the distribution of disc springs.
박병태 ( Byung Tae Park ),권기혁 ( Ki Hyuk Kwon ) 한국안전학회(구 한국산업안전학회) 2017 한국안전학회지 Vol.32 No.1
Masonry walls which are commonly used for partitions in low-rise reinforced concrete (RC) structures, can be easily exposed to high risks under strong earthquakes. Since the strength degradations cannot be protected under the ground motions, their applications cannot be recommended for building structures which are designed to possess high seismic performances. However, masonry-infilled walls are typically considered as non-structural elements in evaluating the seismic performance of building structures. In order to figure out this problem, this study performed experiments using two specimens-only RC frame and RC frame infilled with masonry walls- under static loading. Also, the study established analytical models representing fully infilled frames and bare frame, and compared their structural behavior with test results. In addition, analytical model representing partially infilled frames was established and analyzed. Test results indicated that strength and energy dissipating capacity were increased for IW-RN(fully infilled frames) compared to the NW(bare frame). The nonlinear static analysis of the three specimens was also conducted using the inelastic plastic hinge frame element and diagonal strut models, and the analytical results successfully simulated the nonlinear behaviour of the specimens in accordance with the test results.
하이브리드 감쇠장치의 이력특성 및 해석모델에 관한 연구 - 강재슬릿과 회전마찰 감쇠장치를 결합한 복합 감쇠장치 -
박병태(Park, Byung-Tae),이준호(Lee, Joon-Ho) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.11
The present study proposed a hybrid damping system that can minimize structural damage caused by an earthquake. In hybrid damping system, a rotational friction damping device and a steel hysteresis damping device are connected in parallel. The rotational friction damping device with high stiffness operates at low displacement; and then, it behaves in a composite movement at high displacement to dissipate the energy generated by an earthquake. To propose the hysteresis characteristic and numerical analysis model of the composite damping device, a total of 15 specimens were prepared and were made to undergo cyclic loading according to the damping device test methods of KDS 41 17 00 and MOE 2019. From the results of the experiment, the maximum and minimum loads at the origin, as well as in each direction, and the hysteresis curve area were determined to be within the maximum ±6% of the average value, satisfying the suitability criteria of Korea damping devices. The four numerical analysis models, which were proposed for the vibration suppression and seismic reinforcement effect evaluation, adequately simulated the experimental results; however, the tri-linear model exhibited a tendency to underestimate the energy absorption capacity at 60mm the experimental displacement.
파이버 요소를 이용한 비보강 조적벽체의 비선형 해석모델
박병태(Park, Byung-Tae),이선재(Lee, Seon-Jae),신동현(Shin, Dong-Hyeon) 대한건축학회 2023 대한건축학회 학술발표대회 논문집 Vol.43 No.2
Since the establishment of the Seismic Retrofit General Plan in 2011, seismic performance assessment has been actively conducted for the seismic retrofitting of existing public facilities and school buildings. However, performance assessment of unreinforced masonry buildings in South Korea is limited to linear analysis owing to the limited deformation capacity of the materials. This study developed an analysis model of unreinforced masonry walls for the performance assessment of buildings constructed with such walls. The proposed model involves fiber elements with pinching effects based on the stress–strain curve of masonry elements. The performance of the analysis model was validated by comparing its results with experiment results from existing research. The proposed nonlinear analysis model adequately simulated the rigidity and maximum load capacity of unreinforced masonry walls and accurately predicted their limited deformation capacity.
하이브리드 감쇠장치의 이력특성 및 해석모델에 관한 연구 - 강재슬릿과 회전마찰형 감쇠장치를 결합한 복합 감쇠장치 -
박병태(Park, Byung-Tae),이준호(Lee, Joon-Ho) 대한건축학회 2020 대한건축학회 학술발표대회 논문집 Vol.40 No.2
This study mainly treats a hybrid damper system, which is able to minimize structural damage under earthquake loads. In the hybrid damper system, a rotational friction damper and a steel hysteretic damper are combined in parallel, so that the rotational friction damper operates in initial displacement, while both dampers work in combination in high displacement. In order to suggest the hysteresis characteristics and numerical analysis model of the hybrid damper, a total of 6 specimens were manufactured and tested, and their suitability in reference to the seismic design standards (KDS41-17) was examined. Four numerical analysis models were presented based on the test results and their effectiveness was verified by comparing them with the test results using a computer analysis program.