Linear and Nonlinear 3-D Finite Element Analysis for Mat Foundations

Mahmood, Mahmood R.; Abbas, Mohammad; Mahmood, Mohammad M.

doi:10.1007/978-981-15-9399-4_20

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…Современные строительные нормы и правила, принятые в Российской Федерации 1 и за рубежом 2 , предписывают проводить расчеты железобетонных конструкций в нелинейной постановке с учетом реальных свойств бетона и арматуры. С одной стороны, проблема разработки методики расчета железобетонных конструкций с учетом трехосного напряженного состояния связана с необходимостью проведения дорогостоящих экспериментов [1][2][3][4][5]. С другой -предпосылки для успешного выполнения таких расчетов обусловлены развитием компьютерных технологий и разработкой численных методов строительной механики, в первую очередь метода конечных элементов [6][7][8][9][10].…”

Section: Introductionunclassified

Models of nonlinear deformation of concrete in a triaxial stress state and their implementation in the PRINS computational complex

Agapov,

Markovich,

Aidemirov

2023

Struct. Mech. of Eng. Const. and Build

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Modern construction standards and regulations prescribe to carry out calculations of concrete and reinforced concrete structures in a nonlinear formulation with account of the real properties of concrete and reinforcement. However, the most of finite-element program complexes cannot perform such calculations in a nonlinear formulation with account of plastic deformations of concrete and reinforcement. To solve this problem, a methodology has been developed and a solid finite element adapted to the PRINS computing complex has been created, which made it possible to perform calculations of reinforced concrete structures considering their actual work. The aim of the study - development and implementation of a method for calculating reinforced concrete structures under conditions of a three-dimensional stress state, considering both brittle fracture and elastic-plastic deformation of concrete. A finite-element methodology, algorithm, and program for calculation of massive reinforced concrete structures with account of plastic deformations of concrete have been presented. The methodology is based on the modified Willam and Warnke strength criterion supplemented with the flow criterion. Two models of volumetric deformation of concrete have been regarded: the elastic model at brittle failure and the ideal elastoplastic model. An eight-node finite element with linear approximating functions of displacements implementing the mentioned deformation models is created. Verification calculations of a massive concrete structure in three-axial compression testify to the accuracy and convergence of the developed finite elements. The PRINS can be effectively used by engineers of designing and scientific organizations to solve a wide class of engineering problems related to calculations of building structures.

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Section: Introductionunclassified

Models of nonlinear deformation of concrete in a triaxial stress state and their implementation in the PRINS computational complex

Agapov,

Markovich,

Aidemirov

2023

Struct. Mech. of Eng. Const. and Build

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Kohezyonsuz Zeminde Temel Geometrisi Etkisinin Lineer ve Lineer Olmayan Sonlu Elemanlar Analizleri ile Karşılaştırılması

EFE,

ÇELİK,

BAŞAR

2024

Teknik Bilimler Dergisi

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Literatürde sıklıkla kullanılan analitik yöntemlerde bulunan formüllerin yeterli veya ekonomik olmamasından kaynaklanan alternatif metotlar arayışı ile son yıllarda yatak katsayıları ve sonlu elemanlar analizleri ile temel-zemin etkileşimi incelenmektedir. Özellikle sonlu elemanlar yöntemi ile yapılan çalışmalarda, çalışmaların model testler ile doğrulanması ve programlara girilen bünye modelleri, analizlerin daha gerçekçi sonuçlanması için önem arz etmektedir. Bu çalışmada %50 ve %85 olmak üzere iki farklı rölatif sıkılıkta kohezyonsuz zeminde iki farklı temel geometrisinde lineer ve lineer olmayan bünye modellerince sekiz sonlu elemanlar analizi Ansys programı kullanılarak yapılmıştır. Çalışmada sonuç olarak, aynı düşey yükleme koşullarında dairesel temelin kare temele göre daha fazla oturduğu ancak dairesel temelde gerilme dağılımının kare temele göre daha üniform olduğu belirlenmiştir. Lineer olmayan analizlerde çok sıkı zeminde performans halindeki temel-zemin etkileşiminin zemin matrisi davranışında daha gerçekçi sonuçlar sunması ile oturma farkları yüzdesel olarak lineer duruma göre daha az çıkmıştır.

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Linear and Nonlinear 3-D Finite Element Analysis for Mat Foundations

Cited by 2 publications

References 2 publications

Models of nonlinear deformation of concrete in a triaxial stress state and their implementation in the PRINS computational complex

Models of nonlinear deformation of concrete in a triaxial stress state and their implementation in the PRINS computational complex

Kohezyonsuz Zeminde Temel Geometrisi Etkisinin Lineer ve Lineer Olmayan Sonlu Elemanlar Analizleri ile Karşılaştırılması

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