Journal of Structural Engineering & Applied Mechanics - Golden Light Publishing ® | Trabzon

Journal of Structural Engineering & Applied Mechanics

ARTICLES

Vagif Hacıyev Gülnar R. Mirzeyeva A.I. Shiriyev

The purpose of this study is to investigate the effects of the inhomogeneous and elastic foundation on the frequency of orthotropic plates. The inhomogeneity of orthotropic materials varies linearly with the coordinates of length and thickness. The basic equation is derived applying the Donnell-Mushtari theory and solved using Galerkin method. The effects of inhomogeneity, Winkler elastic foundation and orthotropy on the frequencies are investigated in detail.

https://doi.org/10.31462/jseam.2018.01001005


Şevket Ateş Zeliha Tonyalı

In this study, a coupled model based on boundary element and finite element methods is used to analyze the dynamic responses of two-dimensional model resting on layered soil medium under spatially varying ground motion effects. The dynamic response of the soil-structure systems is obtained in the frequency domain. The results of the finite element and the coupling finite-boundary element models are compared with each local soil conditions. In the seismic analysis of the system the substructure method is employed. In the standard finite element model both the structure and semi-infinitive soil medium are modeled by finite elements, but in the coupling finite-boundary element model the structure and the soil medium are modeled respectively by finite and boundary elements. In the last method, the special features and advantages of the two methodologies are considered. In the coupling of finite-boundary element method, equivalent finite element approach is used in which boundary element region is transformed as an equivalent finite element and the final system is solved as a stiffness problem. Results of the study show that the coupling finite-boundary element method can provide realistic and effective modeling of soil-structure interaction problems as compared with standard finite element method results.

https://doi.org/10.31462/jseam.2018.01006021


Barış Sevim

Composite columns are used to increase, strength for a given cross sectional dimension; stiffness leading to reduced slenderness and buckling resistance; corrosion and fire resistance in the case of concrete encased columns. Also they provide a formwork for concrete filled steel tubes and economical solutions with regard to material costs. They are effectively started to use in the world. This study presents the dynamic and static behaviour assessment of a steel covered column. In the content of the study, full concrete filled rectangular steel tube column as a composite column is selected for numerical analysis and its finite element model is constituted using computer software. Dynamic behaviour of the model is obtained performing modal analysis. The natural frequencies and mode shapes are obtained as dynamic characteristics to understand dynamic behaviour. Then the model is statically performed. In static analysis, both of vertical and lateral loads are applied to models. The displacement and stress changes in some critical nodes and sections and contour diagrams are reported by graphs and figures after static analysis.

https://doi.org/10.31462/jseam.2018.01022027


Saffet Kılıçer Korhan Özgan Ayse Turhan Daloğlu

The effects of the subsoil have a very important role on the behaviour of the structures. For many years these effects have been neglected and the superstructure is designed without considering the soil-structure interaction. However, earthquakes in recent years has clearly shown the importance of soil-structure interaction on the design of the structures, and studies on soil-structure interaction have increased especially in the last 50 years. In this study, the effect of soil-structure interaction on behaviour of reinforced concrete structures is investigated. The effect of subsoil has been taken into account using Winkler and Vlasov Model in addition to rigid base assumption. For this purpose, an interface that allows SAP2000 and MATLAB to be used simultaneously has been developed in MATLAB. It is observed that soil-structure interaction has a significant effect on the column longitudinal reinforcement ratio of reinforced concrete structures.

https://doi.org/10.31462/jseam.2018.01028033


Fatma Ülker Ragıp İnce

In this study, it was carried out on the analysis of steel road bridges using SAP2000 package program, which uses line-girder approach and exact calculation methods, which are known as approximate methods and using influence lines. A three-span steel bridge was analyzed in this research with Line-Girder and SAP2000 packet programs. With the Line-Girder method, analysis, calculations and design have been seen to be quite complex, tedious and time-consuming, with conclusions that are uncertain. It has been demonstrated in this study that the analysis is done effectively in a short period of time by using precise calculation methods instead of this method and the appropriate results are achieved

https://doi.org/10.31462/jseam.2018.01034040