Seismic Performance of an Existing Low-Rise Reinforced Concrete Piloti Building Retrofitted by Steel Rod Damper

백은림,; 오상훈,; 이상호,

doi:10.5000/eesk.2014.18.5.241

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…Since the WKDS has higher initial stiffness and lower yield strength than the original structure, the WKDS can increase the energy dissipation capacity of the whole system earlier than the original RC structure can. The highest performance of the Kagome damper can be expected when the yield displacement of the damper is less than 25% of the yield displacement of the structure [29]. In this study, the Kagome damper was designed to yield at the 10% of the yield displacement of the structure.…”

Section: Design Of the Kagome Dampermentioning

confidence: 99%

“…Buildings 2022, 12, x FOR PEER REVIEW 9 of 25 displacement of the structure [29]. In this study, the Kagome damper was designed to yield at the 10% of the yield displacement of the structure.…”

Section: Design Of the Kagome Dampermentioning

confidence: 99%

“…Therefore, it was determined that the masonry walls should be in the y-direction to confirm the seismic performance. The modeling of the Kagome damper was modeled in a bi-linear manner using the results of a previous study [29] as well as the results of this experiment. Figure 21 shows the hinge properties of columns and beams.…”

Section: Building Modelmentioning

confidence: 99%

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Seismic Strengthening of RC Structures Using Wall-Type Kagome Damping System

et al. 2022

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In this study, the Kagome truss damper, a metallic wire structures, was introduced and its mechanical properties were investigated through theoretical analyses and experimental tests. The yield strength of the Kagome damper is dependent on the geometric shape and diameter of the metallic wire. The Kagome damper has higher resistance to plastic buckling as well as lower anisotropy. Cyclic shear loading tests were conducted to investigate the energy dissipation capacity and stiffness/strength degradation by repeated loadings. The hysteretic properties obtained from the tests suggest that a modification of the ideal truss model with a hinged connection could be used to predict the yield strength and stiffness of the damper. For seismic retrofitting of a low-rise RC moment frame system, a wall-type Kagome damping system (WKDS) was proposed. The effectiveness of the proposed system was verified by conducting cyclic loading tests using a RC frame with/without the WKDS (story drift ratio limit 1.0%). The test results indicated that both the strength and stiffness of the RC frame increased to the target level and that its energy dissipation capacity was significantly enhanced. Nonlinear static and dynamic analyses were carried out to validate that the existing building structure can be effectively retrofitted using the proposed WKDS.

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Section: Design Of the Kagome Dampermentioning

confidence: 99%

Section: Design Of the Kagome Dampermentioning

confidence: 99%

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Seismic Strengthening of RC Structures Using Wall-Type Kagome Damping System

et al. 2022

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“…Weak-soft storey irregularity can occur in unsupervised buildings in recent years. For this reason, many researchers have been made various suggestions (Baek and Lee 2015). Generally, it is recommended to use reinforced concrete walls in buildings as well as supporting them with cross frames (Searer et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Analytical investigation of the measures to be taken against weak storey irregularities

Cansiz

2023

rdlc

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Due to the earthquakes that have occurred in recent years, heavy damage has occurred in many structures in the world. When the damages occurred after the earthquakes have been examined, it has been observed that the damage occurred frequently in certain structures. These structures are generally structures with different shear capacity due to different story heights. This type of damage is defined as weak-soft storey irregularity in earthquake codes. For this reason, the use of reinforced concrete walls is recommended in the earthquake codes that have been updated in recent years. In addition, it is recommended by many researchers to strengthen the structures with various cross-frames on the storey where weak storey occur in such structures. For this purpose, a pushover analysis of structures with various storey heights and storey numbers supported by various cross-frames has been carried out. For this purpose, seismic analysis of 60 reinforced concrete structures has been made with the Seismo-Build program. In this study, the effectiveness of cross frames used in buildings with reinforced concrete wall and weak storey irregularities has been investigated.

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Fire performance of CFRP-strengthened piloti-type columns with fire-resistant materials during standard fire exposure

Shin,

Lee,

Choi

et al. 2024

Sci Rep

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This paper presents a numerical investigation into the fire endurance of carbon fiber reinforced polymer (CFRP)-strengthened columns, shielded with fire-resistant materials, in piloti-type reinforced concrete buildings. The strengthened column, equipped with a fire protection system, underwent exposure to the ASTM E119 standard time-temperature curve for a duration of 4 h. To comprehensively evaluate the thermal and structural performance of the strengthened column at elevated temperatures and substantiate the effectiveness of the fire protection system, a fully coupled thermal-stress analysis was conducted. The numerical modeling approach employed in this study was rigorously validated through previous experimental studies in conjunction with adherence to the ACI design guideline, specifically ACI 440.2R-17. Using the validated structural fire model, the thermal and structural behaviors of the RC column with an insulated CFRP strengthening system were investigated based on four key performance criteria: glass transition temperature, ignition temperature of polymer matrix, critical temperature of reinforcing bars, and the design axial load capacity at elevated temperatures. Furthermore, a comparative assessment of fire endurance was performed using diverse fire-resistant materials, including Sprayed Fire-Resistive Material (SFRM) and Sikacrete ® -213 F, with insulation thicknesses ranging from 10 to 30 mm, during the 4-hour fire exposure period.

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Seismic Performance of an Existing Low-Rise Reinforced Concrete Piloti Building Retrofitted by Steel Rod Damper

Cited by 8 publications

References 5 publications

Seismic Strengthening of RC Structures Using Wall-Type Kagome Damping System

Seismic Strengthening of RC Structures Using Wall-Type Kagome Damping System

Analytical investigation of the measures to be taken against weak storey irregularities

Fire performance of CFRP-strengthened piloti-type columns with fire-resistant materials during standard fire exposure

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