THE EFFECT OF DIMENSIONAL PARAMETERS ON THE BEHAVIOUR OF REINFORCED CONCRETE SLABS WITH CONTINUOUS DROP PANEL

Abstract

In this study, a reinforced concrete story frame with the slab with continuous drop panel in which slab span length was equal in two directions was investigated. In the finite element modeling, the thickened portions of the slab which was called band-beams or slab-bands were accepted as frame elements and slabs as shell elements. The lumped type plastic hinge model was used for the nonlinear behavior of the story frame system under the dead and live loads. In total, 810 solutions were performed on the story frame by modifying some properties, namely: the concrete strength, the span length, the width of continuous band-beam, the height of continuous band-beam and the percentage of steel reinforcement. The support moments, the span moments and span midpoint vertical deflections were calculated for the interior and the exterior spans. Using these results, several functions of the moment and deflection were obtained by using STATISTICA program. The results obtained using the equivalent frame method and the defined functions were compared with those of the finite element method. It was concluded that the proposed method (defined functions) solutions were more compatible with those of the finite element method according to the equivalent frame method results.

Keywords

• Band beam, continuous drop panel, finite element, non-linear analysis, statistically analysis,

SÜREKLY TABLALI KYRY?SYZ DÖ?EMELERYN DAVRANI?INA BOYUTSAL PARAMETRELERYN ETKYSY

Öz

Bu çaly?mada, her iki do?rultuda e?it dö?eme açykly?yna sahip sürekli tablaly kiri?siz dö?emeli bir betonarme kat çerçevesi incelenmi?tir. Çözümlerde sonlu elemanlar yöntemi kullanylmy?tyr. Sonlu eleman a? sisteminde bant-kiri? veya dö?eme bandy olarak isimlendirilen sürekli tablalar, çerçeve eleman olarak ve dö?emeler ise kabuk eleman olarak modellenmi?tir. Ölü ve hareketli yükler altynda kat çerçeve sisteminin do?rusal olmayan davrany?y için toplanmy? tip plastik mafsal modeli kullanylmy?tyr. Kat çerçevesinin, beton synyfy, hesap açykly?y, sürekli tablalaryn geni?lik ve yükseklikleri ile donaty oranlary de?i?tirilerek toplamda 810 adet çözüm elde edilmi?tir. Çözümlerden dy? ve iç açyklyklaryn mesnet ve açyklyk momentleri ile dü?ey yer de?i?tirme de?erleri elde edilmi?tir. Bu sonuçlar kullanylarak, STATISTICA programy yardymyyla, moment ve yer de?i?tirme de?erlerine uygun fonksiyonlar elde edilmi?tir. Tanymlanan bu fonksiyonlar ve e?de?er çerçeve yöntemiyle elde edilen sonuçlar, sonlu elemanlar yöntemi sonuçlaryyla ayry ayry kar?yla?tyrylmy?tyr. Sonuç olarak önerilen yöntem çözümlerinin, e?de?er çerçeve yöntemine göre sonlu elemanlar yöntemi ile daha uyumlu oldu?u tespit edilmi?tir.

Anahtar Kelimeler

• Bant kiri?, sürekli tabla, sonlu eleman, do?rusal olmayan analiz, istatistiksel analiz,