Estimation of fundamental periods of shear‐wall dominant building structures

Balkaya, Can; Kalkan, Erol

doi:10.1002/eqe.258

Cited by 65 publications

(38 citation statements)

References 5 publications

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“…Zalka (2001) applied a simplified equivalent column concept for calculation of the natural frequencies of multi-storey buildings. Balkaya and Kalkan (2003) analysed 80 RC shear wall structures constructed using tunnel forms and compared their natural periods with those obtained by code formulae. They proposed an empirical formula that corresponded well with the analysis results.…”

Section: Introductionmentioning

confidence: 99%

Fundamental period formulae for RC staggered wall buildings

Kim¹,

Lee²

2014

Magazine of Concrete Research

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The objective of this work was to derive empirical formulae for the fundamental natural period of reinforced concrete staggered wall system structures using modal analysis results. To this end, 32 model structures of varying height and span length were designed and their fundamental natural periods were computed by modal analysis. The proposed formulae for the natural period of staggered wall structures with and without a middle corridor were determined from regression analysis. To validate the proposed formulae, the seismic performance of selected model structures designed using the formulae was investigated. According to the regression analysis, the computed best-fit formulae for the model structures represent the natural periods precisely. The structures designed using the proposed formulae showed satisfactory performance against the design seismic load.

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Section: Introductionmentioning

confidence: 99%

Fundamental period formulae for RC staggered wall buildings

Kim¹,

Lee²

2014

Magazine of Concrete Research

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“…However, despite the abundance of such structures, three-dimensional (3D) experimental studies on 3D behavior, seismic performance, load capacities, collapse mechanisms, and crack propagations have been limited. 3D behavior and seismic performance of the tunnel form structures are previously studied [1][2][3][4] by nonlinear finite element analysis (FEA) and modeling. Balkaya and Kalkan [5] indicated that the first period is usually torsion due to construction techniques ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Improving Torsional Rigidity and Seismic Performance of Tunnel Form Building Structures

Balkaya¹,

Karagoz

Gunal³

2017

International Journal of Engineering Technologies IJET

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Abstract-Tunnel form buildings, which have shear-wall dominant structural systems, are usually built in countries exposed to substantial seismic risk and very commonly used because of its fast construction technique and low cost. Very limited research has been directed to their experimental studies on 3D behavior, seismic performance, load capacities, collapse mechanisms, and crack propagations. Previous studies indicate that most of the time the first period of the structure is torsion due to construction techniques outer faces is open to take the tunnel forms to out by cranes. This will cause less torsional rigidity, whereas for strong earthquakes, torsional rigidity has to be increased. Four different strengthening techniques, i.e., steel braces, reinforced concrete (RC) infill shear wall, precast concrete shear wall, and RC shear wall at the façade, were applied to improve torsion rigidity. Experimental studies and 3D nonlinear finite element analysis (FEA) were performed on models. The analytical model results, the economy and applicability of construction techniques suggest that steel bracing is the most suitable and practical method to improve torsional rigidity as well as seismic performance. Three-story scaled existing and strengthened experimental models are tested under pushover loads, and the results are compared with 3D nonlinear finite element analysis.

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“…Balkaya and Kalkan [20] investigated Consistency of equations in seismic codes (Uniform Building Code, International Conference of Building Officials, [21]) and the Turkish Seismic Code ( [22]) related to their dynamic properties. They observed that the given empirical equations for prediction of fundamental periods of SW dominant multi-storey RC structures yield inaccurate results.…”

Section: Dynamic Characteristic Of Reinforced Building Using Numericamentioning

confidence: 99%

Comparison of fundamental periods of reinforced shear wall dominant building models with empirical expressions

et al. 2015

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Original scientific paper Empirical formulas for the estimation of the fundamental periods have been included in seismic codes, which mainly depend on building height, material (steel, reinforced concrete (RC)) and structural system type (frame, shear wall, etc.). These formulas have been usually derived from empirical data through regression analysis of the measured fundamental period of existing buildings subjected to seismic actions. A parametric study on 480 different RC building models with shear walls was performed with varied parameters: building height, number of bays and the ratio of shear walls area to floor area. The aim of this paper is to verify these empirical expressions, which are given by different authors and seismic codes and to conclude whether the expressions are good enough as a starting assumption for the design of earthquake resistant buildings.Keywords: EN1998-1; fundamental period; parametric study; RC shear walls; structure models Usporedba osnovnih perioda modela zgrada s armiranobetonskim zidovima s empirijskim izrazimaIzvorni znanstveni članka Empirijski izrazi za procjenu osnovnih perioda su sastavni dio propisa za proračun seizmičkih djelovanja te uglavnom ovise o visini, materijalu (čelik, armirani beton) i nosivom sustavu(okvir, posmični zidovi, itd.) građevine. Ovi izrazi su obično nastali iz empirijskih podataka kroz analizu mjerenih osnovnih perioda postojećih građevina pod djelovanjem potresa. Provedena je parametarska studija na 480 modela armiranobetonskih zgrada s posmičnim zidovima s različitim ulaznim podacima: visina zgrade, broj raspona i omjer površine posmičnih zidova i tlocrtne površine zgrade. Cilj ovog istraživanja je provjeriti empirijske izraze različitih autora i seizmičkih propisa u svrhu provjere točnosti izraza kao početnih pretpostavki kod projektiranja potresno otpornih građevina.

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Estimation of fundamental periods of shear‐wall dominant building structures

Cited by 65 publications

References 5 publications

Fundamental period formulae for RC staggered wall buildings

Fundamental period formulae for RC staggered wall buildings

Improving Torsional Rigidity and Seismic Performance of Tunnel Form Building Structures

Comparison of fundamental periods of reinforced shear wall dominant building models with empirical expressions

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