Ahmet Emin Kurtoglu

This paper is aimed at investigating the effect of multiple longitudinal stiffeners on the patch loading resistance of slender steel plate girders. Firstly, a numerical study is conducted through geometrically and materially nonlinear analysis with imperfect ions included (GMNIA), the model is validated with experimental results taken from the lite...

Circular hollow sections (CHS) are widely used in construction, particularly in space structures. This paper aims at investigating the feasibility of employing a machine leaning approach to predict the axial strength of longitudinal branch plate-to-CHS connections subjected to branch loadings. Using nonlinear finite element analysis, numerical mode...

This paper is aimed at investigating the effect of multiple longitudinal stiffeners on the patch loading resistance of slender steel plate girders. Firstly, a numerical study is conducted through geometrically and materially nonlinear analysis with imperfections included (GMNIA), the model is validated with experimental results taken from the liter...

You've been waiting for it, and we've delivered! The newest edition of the SSRC Newsletter is now available. As current SSRC Chair, Dan Linzell, puts it: "I believe you will all agree that this year's edition of the Newsletter clearly shows the Council's dedication to being the forum where stability aspects of metal and composite metal-and-concrete...

This study aims at investigating the punching shear behavior of square RC interior slab–column connections reinforced with glass fiber reinforced polymer (GFRP) rebars. A total of eight specimens are tested under vertical shear until failure. Five of the specimens are reinforced with GFRP rebars and three specimens with conventional steel reinforce...

Artificial intelligence (AI) has become a reliable tool for the solution of structural engineering problems. This paper aims at developing prediction models for the behavior of extruded aluminum beams under patch loading via symbolic regression (SR) and artificial neural networks (ANN). The models are constructed employing an extensive dataset calc...

Strengthening is often required for reinforced concrete, steel, and masonry structures or structural elements when they possess insufficient performance against external loads such as earthquakes. Recently, the use of carbon fiber‐reinforced polymers (CFRP) has been considered a viable strengthening technique alternative to traditional methods. The...

This paper proposes a new hybrid composite tubular beam system that consists of an exterior high-density polyethylene (HDPE) tube with interior steel tube and self-compacting geopolymer concrete (SCGC). The flexural behavior of composite tubular beams with SCGC encased in HDPE tubes was investigated experimentally and theoretically. A total of twen...

Over the last decades, in spite of its cost, the use of stainless alloys has grown significantly owing to environmental concerns, low maintenance, and high corrosion resistance. This paper is aimed at developing at prediction model for the resistance of slender austenitic stainless steel plate girder subjected to patch loading using a machine learn...

Autoclaved aerated concrete (AAC) provides advantageous material characteristics such as high thermal insulation and environmentally friendly properties. Besides its non-structural applications, AAC is being considered as a structural material due to its characteristics such as lighter weight compared to normal concrete. In this study, main focus i...

This study investigates the simultaneous effect of nano-silica and steel fiber on the fresh and hardened state performance of self-compacting geopolymer concretes (SCGC). For this purpose, self-compacting geopolymer concretes without and with nano-silica (0, 1% and 2%), and without and with steel fiber (0, 0.5% and 1%) were produced. Hooked-end ste...

This study proposes a new model for the residual compressive strength of structural lightweight concrete after exposure to elevated temperatures up to 1000 °C. For this purpose, a database of residual compressive strengths of fire exposed lightweight concrete was compiled from the literature. Database consisted a total number of 289 data points, us...

This paper aims at investigating the mechanical properties and short term durability performance of Self-Compacting Concrete (SCC)–filled High Density Polyethylene (HDPE) tubes with and without steel fibers. A total of 45 cylinder specimens were prepared and subjected to aggressive substances such as sulfate or acid contents. At the end of each exp...

Steel girders are the structural members often used for passing long spans. Mostly being subjected to patch loading, or concentrated loading, steel girders are likely to face sudden deformation or damage e.g., web breathing. Horizontal or vertical stiffeners are employed to overcome this phenomenon. This study aims at assessing the feasibility of a...

In this paper, mechanical and short-term durability properties of fly ash and slag based geopolymer concretes (FAGPC-SGPC) were investigated. The alkaline solution was prepared with a mixture of sodium silicate solution (Na2SiO3) and sodium hydroxide solution (NaOH) for geopolymer concretes. Ordinary Portland Cement (OPC) concrete was also produced...

Precast corbels are commonly preferred structural members in industrial buildings. In this study, a novel application of support vector machines (SVM) is employed for the prediction of ultimate shear strength of fiber reinforced corbels, for the first time in literature. SVM models are developed and analyzed using a database of available test resul...

This pioneer study investigates the size effect on the compressive and tensile strengths of fiber-reinforced self compacting concrete (FR-SCC) with different specimens, before and after exposure to elevated temperatures. 432 selfcompacting concrete (SCC) specimens with two concrete grades (50 and 80MPa) and three steel fiber ratios (0%, 0.5% and 1%...

This study investigates the short term performance of fly ash-based geopolymer concrete prepared with and without nano-silica (NS) along with alkaline activators. The specimens were submerged in sea water with 3.5% salt for four weeks. Ordinary Portland Cement (OPC) concrete was also used for quality control specimens for comparison purpose. Invest...

This paper presents an investigation on the durability of geopolymer concrete produced using a class F fly ash (FA), ground granulated blast furnace slag (GGBFS) and alkaline activators. The specimens were submerged in 3.5% solution of sea water for up to 4 weeks. Ordinary Portland Cement (OPC) concrete was also used for quality control specimens f...

In this study, a novel application of symbolic regression (SR) is employed for the prediction of ultimate shear strength of steel fiber reinforced (SFRC) and glass fiber reinforced (GFRC) corbels without stirrups, for the first time in the literature. A database is created using the test results (42 tests) conducted by the authors of current paper...

This paper deals with the reliability analysis of design formulations derived for predicting the punching shear capacity of FRP-reinforced two-way slabs. Firstly, a new design code formulation was derived by means of gene expression programming. This formulation differs from the existing ones as the slab length (L) was introduced in the equation. N...

Reinforced concrete slabs, just as the other structural elements, are highly affected by the high temperatures. Due to the decrease in strength of reinforced concrete members under high temperature, bearing moment capacity of reinforced concrete slabs also decreases. In this study, a prediction model is investigated in order to determine the bearin...

Determining Marshall design test results is time consuming. If the researchers can obtain stability and flow values by mechanical testing, rest of the calculations will just be mathematical manipulations. Marshall stability and flow tests were carried out on specimens fabricated with different type of polypropylene fibers. It has been shown that ad...

Recent development in data processing systems had directed study and research of engineering towards the creation of intelligent systems to evolve models for a wide range of engineering problems. In this respect, several modeling techniques have been created to simulate various civil engineering systems. This study aims to review the studies on sup...

In this study, reliability analyses of steel fiber reinforced concrete (SFRC) corbels based on stochastic finite element were performed for the first time in literature. Prior to stochastic finite element analysis, an experimental database of 84 sfrc corbels was gathered from literature. These sfrc corbels were modeled by a special finite element p...

Abstract. The lack of experimental studies on the mechanical behavior of reinforced concrete (RC) haunched beams leads to difficulties in statistical and reliability analyses. This study performs stochastic and reliability analyses of the ultimate shear capacity of RC haunched beams based on nonlinear finite element analysis. The main aim of this s...