Incremental dynamic analysis of high‐rise towers

Asgarian, Behrouz; Yahyai, Mahmood; Mirtaheri, Masoud; Samani, Hamid Rahmani; Alanjari, Pejman

doi:10.1002/tal.518

Cited by 24 publications

(7 citation statements)

References 7 publications

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“…The maximum inter‐story drift measure is not applicable to RC chimney structure because limitations on inter‐story drift are primarily to avoid damage to drift‐sensitive non‐structural components (Goyal and Maiti, ). If maximum roof displacement was used as the damages measures for RC chimney, misleading conclusions would be inevitably drawn (Asgarian et al ., ). This can be attributed to the fact that the RC chimney is tall, slender cantilever type structure such that the higher modes have a very significant influence on the structural dynamic response, resulting in that roof displacement is not always the maximum displacement.…”

Section: Damage State and Limit Statementioning

confidence: 97%

Seismic fragility assessment of a tall reinforced concrete chimney

Zhou

Zeng

Pan

et al. 2014

Structural Design Tall Build

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Summary In China, a considerable proportion of reinforced concrete (RC) industrial chimneys in operation was designed and constructed in accordance with less rigorous outdated seismic criteria during the end of 19th and early 20th century. However, few research works have been reported till date on a realistic overall assessment of the seismic performance of these existing aging RC chimney structures. Therefore, in this study, fragilities of existing RC chimney were studied. For this purpose, an existing 240 m tall RC chimney was selected and structurally modeled with a lumped mass beam (stick) model by means of the OpenSees analysis program. In order to capture the uncertainties in ground motion realizations, a series of 21 ground motions are selected from the Next Generation Attenuation database as the input motions. To develop the analytical fragility curves, nonlinear incremental dynamic analysis of the studied RC chimney was then carried out using the selected input motions, which were normalized to different excitation levels. The section curvature ductility ratio was considered as the damage index. Based on material strain and sectional analysis, four limit states (LSs) were defined for five damage state. The seismic responses of the all sections were utilized to evaluate the likelihood of exceeding the LSs. Then the peak ground acceleration (PGA)‐based seismic fragility curves of the structure were constructed assuming a lognormal distribution. Finally, under the light of these fragility curves, the damage risks in existing RC chimney were discussed. The analytical results indicated that for design level earthquake of PGA = 0.1 g (g is the gravitational acceleration) and the maximum considered earthquake of PGA = 0.22 g, the probabilities of exceeding the light damage state were around 1.5% and 44%, respectively, while the exceedance probabilities corresponding to moderate, extensive and complete damage states were approximately zero in both cases. On the other hand, fragility analysis revealed that the RC chimney structure had considerable ductility capacity and was capable to withstand a strong earthquake with some structural damages. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Damage State and Limit Statementioning

confidence: 97%

Seismic fragility assessment of a tall reinforced concrete chimney

Zhou

Zeng

Pan

et al. 2014

Structural Design Tall Build

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“…To study the performances of high‐rise structures, the incremental dynamic analysis (IDA) method has been widely used and the estimates can be made based on the fragility analysis accurately. Asgarian et al used IDA method to assess the seismic performance of Tehran T.V. tower.…”

Section: Introductionmentioning

confidence: 99%

Seismic partitioned fragility analysis for high‐rise RC chimney considering multidimensional ground motion

Zhou

Tian

Guo

2018

Structural Design Tall Build

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Summary In order to identify the vulnerable parts and areas of the high‐rise reinforced concrete chimney, this paper presents an effective method, which called partitioned fragility analysis. One 240‐m‐high reinforced concrete chimney was selected as the practical project, and its analytical model was created with ABAQUS software. The selected high‐rise chimney structure was divided into 17 parts, and then the damage probability of each part in different damage states was obtained with the fragility analysis considering multidimensional ground motions. Twenty ground motion records were taken from the Next Generation Attenuation database as the input motions, and the peak ground acceleration was selected as the intensity measure. The response of the chimney structure under multidimensional ground motions was obtained based on incremental dynamic analysis. The maximum strains of concrete and steel bars were defined as the damage limit states of the chimney structure. The fragility curves and surfaces obtained from this analysis showed that the vulnerable areas of the chimney structure appear at 0–20 m, 90–130 m, and 150–200 m along the height of the chimney respectively. Based analytical results, these vulnerable parts can be retrofitted to enhance the seismic resistance of existing chimney structures. And the partitioned fragility analysis method can also be used to improve the design of new chimney structures.

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“…They used three different finite element models. The results exhibit that there is an acceptable consequence between Two-dimensional and Three-dimensional models in linear and nonlinear analysis [38]. Hariri et al, studies were done on seismic stability of a high-rise concrete tower under endurance time analysis (ETA).…”

Section: Incremental Dynamic Analysis and Collapse Assessment Resultsmentioning

confidence: 97%

The Effect of slit-friction hybrid damper on the Performance of Dual System

Khoshkroodi¹,

Sani²

2019

TOCIEJ

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Aims: The aim of the present paper is to evaluate the behavior of slit friction hybrid dampers (SFHD) on steel structures. Therefore, the behavior moment resisting steel frames of structures in original stats and structures equipped with hybrid damper with two different types of behavior was analyzed and evaluated. Background: The recent study evaluated the combined effect of shear-friction dampers and slit dampers with measurements of non-uniform strips in seismic protection for different levels of energy. The recent study was carried out a about hybrid dampers, consisting of friction and split dampers in response to small and large earthquakes. Previous results have shown the ability of inactive hybrid systems in improving the reaction of structures to traditional lateral-systems. Kim and Shin showed that structures consisted of hybrid dampers needed less repair cost and time. Methods: Pushover and time history were carried out on original structures and structures equipped with dampers, in 5 and 10 stories structures. Results: Analysis about the probability of collapse showed about 30% and 84%. Conclusion: According to the result, by adding the SFHD, increased stiffness by 17% in retrofitted structures such as drift and displacement of roof decreases by 27% and 20% in push over analysis, respectively. Also, displacement in time history analysis up to 55% reduces in average. Also, the results of the IDA show that adding the SFHD to structures significantly increases by 55% the spectral acceleration capacity in structures.

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Incremental dynamic analysis of high‐rise towers

Cited by 24 publications

References 7 publications

Seismic fragility assessment of a tall reinforced concrete chimney

Seismic fragility assessment of a tall reinforced concrete chimney

Seismic partitioned fragility analysis for high‐rise RC chimney considering multidimensional ground motion

The Effect of slit-friction hybrid damper on the Performance of Dual System

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