SEISMIC BASE ISOLATION IN STRENGTHENING AN EXISTING RETROFITTED MASONRY-REINFORCED CONCRETE BUILDING IN HUATING - CHINA

In this article, the applicability of mode-adaptive bidirectional pushover analysis (MABPA) to base-isolated irregular buildings was evaluated. The point of the updated MABPA is that the peaks of the first and second modal responses are predicted considering the energy balance during a half cycle of the structural response. In the numerical examples, the main building of the former Uto City Hall, which was severely damaged in the 2016 Kumamoto earthquake, was investigated as a case study for the retrofitting of an irregular reinforced concrete building using the base-isolation technique. The comparisons between the predicted peak response by MABPA and nonlinear time-history analysis results showed that the peak relative displacement can be properly predicted by MABPA. The results also showed that the performance of the retrofitted building models was satisfactory for the ground motion considered in this study, including the recorded motions in the 2016 Kumamoto earthquake.

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Prediction of base Isolation Performance on Reinforced Concrete Building

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.c1012.1183s319 ◽

2019 ◽

Vol 8 (3S3) ◽

pp. 394-398

Keyword(s):

Reinforced Concrete ◽

Base Isolation ◽

Reinforced Concrete Building ◽

Base Isolator ◽

Amplitude Vibration ◽

Concrete Building ◽

External Sources ◽

Vibration Problems ◽

Low Amplitude ◽

Isolation Performance

Vibration problems can occur in any buildings due to the surrounding activities and becomes more important issues amongst engineers. The vibration can be induced by internal and external sources around the building. The movement of earthquake can be caused of vibration in the building. The vibration will affect the electronic equipment such as computers and may cause the residents to feel uncomfortable in the building. The objective of this paper is to investigate the performance of base isolator at reinforced concrete building due to low amplitude vibration by using finite element ANSYS software. The prediction on vibration response at structural floor based on performance with base isolator and without base isolator. The presence of base isolator is expected to produce more stable and safe building from any vibration either from internal or external excitation. It will increase the stiffness of the structure and thereby reduces its natural frequency. The building will respond to the seismic activity in a rigid manner rather than resonating with its frequency. In terms of sustainability aspects, it will avoid the damaged buildings from the crack etc. and provide more comfort to the occupants inside the building.

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Design of Base Isolation System for a Six Storey Reinforced Concrete Building

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/796/1/012034 ◽

2021 ◽

Vol 796 (1) ◽

pp. 012034

Author(s):

Akshay Chinchole ◽

Charanjeet Singh Tumrate ◽

Dhaneshwar Mishra

Keyword(s):

Reinforced Concrete ◽

Base Isolation ◽

Isolation System ◽

Reinforced Concrete Building ◽

Concrete Building ◽

Base Isolation System

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Application of Mode-Adaptive Bidirectional Pushover Analysis to an Irregular Reinforced Concrete Building Retrofitted via Base Isolation

10.20944/preprints202109.0499.v1 ◽

2021 ◽

Author(s):

Kenji Fujii ◽

Takumi Masuda

Keyword(s):

Reinforced Concrete ◽

Base Isolation ◽

Pushover Analysis ◽

Half Cycle ◽

2016 Kumamoto Earthquake ◽

Isolation Technique ◽

Reinforced Concrete Building ◽

Kumamoto Earthquake ◽

The 2016 Kumamoto Earthquake ◽

Concrete Building

In this article, the main building of the former Uto City Hall, which was severely damaged in the 2016 Kumamoto earthquake, is investigated as a case study for the retrofitting of an irregular Reinforced Concrete building using the base-isolation technique. Its peak response is predicted via mode-adaptive bidirectional pushover analysis (MABPA), which was originally proposed by the authors. In the prediction step of MABPA, the peaks of the first and second modal responses are predicted considering the energy balance during a half cycle of the structural response. The numerical analysis results show that the peak relative displacement can be properly predicted by MABPA. The results also show that the performance of the retrofitted building models is satisfactory for the ground motion considered in this study, including the recorded motions in the 2016 Kumamoto earthquake.

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