Performance assessment of irregular RC buildings with shear walls after Earthquake

Koçak, Ali; Zengin, Başak; Kadıoğlu, Fethi

doi:10.1016/j.engfailanal.2015.05.016

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…Many studies on the seismic analysis of high‐rise buildings have been performed by scholars, who emphasized seismic performance‐based analysis and evaluation methods [ 4,5 ] and the effect of an irregular member layout. [ 6‐8 ] Moreover, innovative brace systems have been studied to improve the seismic performance of high‐rise structures. [ 9,10 ]…”

Section: Introductionmentioning

confidence: 99%

Performance‐based seismic design of the outrigger of a high‐rise overrun building with asymmetric vertical setback in a strong earthquake area

Huang

Chen

et al. 2021

Structural Design Tall Build

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Summary Outriggers, which should be systematically analyzed and designed based on seismic performance methods in the different seismic level actions, can improve the lateral stiffness of irregular high‐rise structures. In this paper, a concrete‐filled steel frame‐core tube‐outrigger structural system is adopted for a practical overrun high‐rise building with an obviously asymmetrical vertical setback in a high‐intensity seismic region. To ensure the seismic safety of irregular high‐rise building structures, the members of the outrigger are designed based on the seismic performance analysis method, and the complex joint region and slab of the outrigger floor are also refined and analyzed. In addition, the effect of outrigger on the damage states of the structural and member is evaluated using the elastic–plastic analysis method in the rare earthquake action. Finally, the seismic mitigation efficiency of the high‐rise structure with the viscous dampers installed on the outrigger floor is analyzed. The results indicate that the member size of the outrigger should be determined based on the performance objectives of the moderate earthquake action rather than the frequent earthquake action. The shear force distribution ratio of the outer frame located at the outrigger floor is obviously amplified, which shows that the cooperative bearing ability of the outer frame and the core tube is improved because of the outrigger action. The stress in the complex joint region of the outrigger, which satisfies the material strength requirement, is analyzed by the refined finite element analysis method. The slab of the outrigger floor, which should be strengthened to effectively transfer larger horizontal seismic shear force, has obvious damage in the rare earthquake action. The region of the structure with an outrigger that experiences significant damage in the rare earthquake action is located at the outrigger floor and adjacent upper domains rather than the bottom domains, which is different from that of a structure without an outrigger. The internal force of the outrigger member can be reduced by considering viscous damper action, but the seismic mitigation efficiency is not significant because of the limited number of dampers.

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Section: Introductionmentioning

confidence: 99%

Performance‐based seismic design of the outrigger of a high‐rise overrun building with asymmetric vertical setback in a strong earthquake area

Huang

Chen

et al. 2021

Structural Design Tall Build

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“…They focused on the observation of comparative study on the regular and L shape buildings and torsional irregularity ratio (B. Khanal and H. Chaulagain [13], Shehata E. Abdel Raheem et al [14], Momen M. M. Ahmed et al [15]). Some other researchers such as S.S. Tezcan, C. Alhan [16], Özmen et al [17], Ali Koçak et al [18] were focused on the study of the torsional effect of shear wall buildings. Researchers observed the torsional irregularity ratio of the different shear walls buildings.…”

Section: Introductionmentioning

confidence: 99%

Effect of position of steel bracing in L-shape reinforced concrete buildings under lateral loading

Bohara¹,

Ganaie²,

Saha³

2021

Res. Eng. Struct. Mater.

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The level of damage in irregular structures is more compared to regular structures. In this study, L shaped RC buildings are investigated with and without steel bracings in different positions in frames. The response spectrum analysis has been done by using ETABs software. The two cases considered, case I and case II for understanding the effect in inverted V bracing in L shape building. Case II shows the suitable seismic parameters when bracing is used properly. Interstory drift, displacements, base shear, fundamental time period, torsional irregularity ratio and the capacity ratio of the columns are evaluated. It is also noticed that adding the steel bracing decreases the inter-story drift, displacements of the structure effectively. The torsional irregularity ratio of each 12 models are studied carefully. The capacity ratio of the selected columns is studied to understand the performance of the columns while using the steel bracing in the buildings. The steel bracings are effectively used as retrofitting in L shaped buildings if the position of bracings are considered in the frames appropriately. While designing irregular buildings with steel bracings, the torsional effect should be checked.

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“…Many researchers have conducted studies to investigate the seismic performance of existing RC buildings (Jalayer et al, 2010;Mazza, 2014;Wahyuni, 2015;Kocak et al, 2015;Melani et al, 2016;Combescure & Wang, 2007;Mosleh et al, 2016;Ghobarah et al, 1998;Repapis et al, 2006a;Repapis et al, 2006b;Cherifi et al, 2015;Qian & Fengge, 2001;Halder & Paul, 2016;Chaulagain et al, 2013;Sobaih & Nazif, 2012). Wahyuni (2015) presented the evaluation of the vulnerability of RC buildings against earthquake loads.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of an existing low-rise RC building considering the addition of a new storey

Gunes

Çoşgun

Sayın

et al. 2019

rdlc

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In low-rise reinforced concrete (RC) buildings, structural design is generally performed considering the seismic effects as well as the vertical loads. However, there may be situations where the additional or unpredicted loads may be encountered during the service life of the buildings. The loads that are governed from a new storey addition during the service life is a good example for these additional loads. Since the reconstruction permits and building height limits specified by the authorities may vary in life-cycle of the structures, it is critical to decide the addition of a storey to an existing building considering the structural safety concerns. In this study, an existing low-rise RC building is modelled with an added storey (subsequently planned for construction), and numerical analyses are carried out considering the extra loads of this additional storey. The aim is to evaluate the seismic performance of the structure considering this unpredicted situation which was not taken into account in the original structural design. The suitability of the preliminary structural design project to the existing building was checked by the site investigations. The results of the numerical analysis were compared with the seismic code requirements, and the seismic performance level of the building is determined. The study is intended to be useful in determining the path to be followed for the determination of the seismic capacity if existing buildings are subjected to additional loads.

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Performance assessment of irregular RC buildings with shear walls after Earthquake

Cited by 11 publications

References 22 publications

Performance‐based seismic design of the outrigger of a high‐rise overrun building with asymmetric vertical setback in a strong earthquake area

Performance‐based seismic design of the outrigger of a high‐rise overrun building with asymmetric vertical setback in a strong earthquake area

Effect of position of steel bracing in L-shape reinforced concrete buildings under lateral loading

Seismic performance of an existing low-rise RC building considering the addition of a new storey

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