A Pushover Seismic Analysis and Retrofitting Method Applied to Low-Rise RC School Buildings

Hsiao, Fu-Pei; Oktavianus, Yusak; Ou, Yu‐Chen; Luu, C. H.; Hwang, Shyh‐Jiann

doi:10.1260/1369-4332.18.3.311

Cited by 18 publications

(4 citation statements)

References 6 publications

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“…Evaluation of structural elements in existing buildings needs to be carried out regularly to improve the earthquake resistance [1][2][3][4]. This awareness is increased due to the earthquake history, which resulted in deaths of people and collapses of buildings, and led to the need for the strengthening system on existing buildings [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

An integrated approach for the strength evaluation on RC beams by the combination of hammer test and compression test

Hidayat,

Ahyani

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The structural performance of the old existing RC building needs to be evaluated, as it is susceptible to severe damage. There are two different types to examine the RC members’ capacity: the destructive and non-destructive tests, with their drawbacks and difficulties. The main purpose of this research is to establish the integrated approach to evaluating the compressive strength of RC beams by providing the strength distribution visualization. Hence, the combination of the results from the hammer test, compression test, and the two-point load flexural test was taken into account. In this study, a combination of destructive and non-destructive tests was performed on the RC beam specimen. The hammer test results discovered that the concrete strength was distributed randomly with a difference of 20%. However, the strength pattern in the compression zone showed similar results: a lower strength value. The abovementioned results were then validated with the flexural test. By comparing the concrete failure and the strength distribution visualization, the damaged area has a smaller compressive strength than other areas. Thus, the engineers could use the visualization of the strength distribution as a guide in considering repairing options on RC beams more effectively.

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Section: Introductionmentioning

confidence: 99%

An integrated approach for the strength evaluation on RC beams by the combination of hammer test and compression test

Hidayat,

Ahyani

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The collapsed buildings typically exhibit damaged beam-column joints (BCJs), compounded by the non-ductile reinforcing details in columns. Consequently, the existing buildings need to be investigated to enhance their earthquake resistance (Gao et al, 2021; Hidayat et al, 2019; Hsiao et al, 2015; Liou et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Modeling of non-ductile RC structure under near-fault ground motions: A nonlinear finite element analysis

Hidayat

Hsiao

et al. 2022

Advances in Structural Engineering

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The old existing reinforced concrete (RC) structures in Taiwan are susceptible to severe damage under earthquakes because of the soft-story mechanism. Moreover, the effects of near-fault ground motions often contain a long period of velocity pulse and permanent ground displacement. This study is based on the tri-axial shaking table test conducted at the National Center for Research on Earthquake Engineering in Taiwan and a series of seismic performance evaluations of a non-ductile RC structure in Taiwan. Finite element analysis (FEA) will be conducted to simulate the linear and nonlinear behavior of the seven-story building. This accommodates the damage plasticity model for concrete and the elastic-perfectly plastic model for reinforcement. Comparison of the results between the experimental test and numerical model showed that the similarity of the vibration period has a great influence on the simulation results. The findings showed that the data of acceleration and displacement behavior corresponded with the experimental results in a satisfactory margin. Also, the damage mode is very similar to the shaking table test results. The study found that using FEA can satisfactorily simulate the seismic performance of mid-rise buildings under a near-fault earthquake.

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“…The hinges are flexural, shear and axial load characteristics. These represent the localized force-displacement relationships through elastic and inelastic ranges under seismic loads.The effects of plastic hinge properties in nonlinear analysis of buildings are studied [8].Pushover analysis with column retrofitting of the school buildings was demonstrated in [9]. The effects of providing additional reinforcement in beams and columns near beam-column joints are examined [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Additional Reinforcement Length in Beams on Base-Shear Capacity in Performance-based Design of Low-Rise Buildings

Kovela¹,

D²,

D³

et al. 2021

cea

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Most of the existing low rise RCC buildings with 4 to 6 floors were constructed pursuant to the code provisions without detailed Earthquake analysis. To comply with the revised code provisions, it is essential to build up the seismic resistance of the existing buildings. International building safety agencies such as NEHRP, FEMA, and ATC etc., formulated the Performance-based design methods to verify the seismic resistance of the existing buildings and also recommend the retrofit the building to achieve the targeted performance. Pushover method (nonlinear static analysis) is one of the methods. This paper describes the increase of seismic capacity of structure with the additional steel contribution from 25 % to 75% increase in the beams near the beam-column joints. Moreover, this additional steel is placed up to 02.L, 0.25L and 0.3L of the beam span. To accomplish the above parameters, 4-storey, 5-storey and 6-storey rectangular framed structures are analyzed with the pushover analysis. The seismic capacity curves in terms of base shear versus displacement are illustrated. It is found that 10 to 25% of base shear is increased when beams are provided with additional reinforcement from 25% to 75% @0.2L. In this case of increasing the additional steel length from 0.20L to 0.3L, nearly 5% increase of the base shear is observed in width direction but no augmentation is observed in the length direction of the building.

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A Pushover Seismic Analysis and Retrofitting Method Applied to Low-Rise RC School Buildings

Cited by 18 publications

References 6 publications

An integrated approach for the strength evaluation on RC beams by the combination of hammer test and compression test

An integrated approach for the strength evaluation on RC beams by the combination of hammer test and compression test

Modeling of non-ductile RC structure under near-fault ground motions: A nonlinear finite element analysis

Effect of Additional Reinforcement Length in Beams on Base-Shear Capacity in Performance-based Design of Low-Rise Buildings

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