Ferhat Aydın

COMPRESSIVE BEHAVIOR OF CONCRETE FILLED GLASS FIBER REINFORCED POLYMER (GFRP) BOX PROFILES

The use of concrete filled fiber reinforced polymer (FRP) profiles for beams and columns has been studied extensively in recent years. Glass Fiber Reinforced polymers (GFRP) profiles are one of these materials. GFRP box profiles serve as formwork, and provide shear and flexural reinforcement in novel hybrid GFRP–concrete structural system. GFRP box profiles also protect the concrete and increase the strength of hybrid materials. This study presents results of an experimental study using concrete filled pultruded GFRP profiles. A series of compression tests were carried out to study the compression behavior of the proposed hybrid GFRP-concrete materials. Hybrid compression samples were fabricated and tested in three different strength classes. The results showed that compressive strength of hybrid material significantly increased when compared to reference samples.

Investigation of Buckling Behavior of FRP-Concrete Hybrid Columns

The use of fiber reinforced plastic (FRP) composite materials in the construction industry increases with each passing day. In recent years, these materials are used as carrier material or reinforcement material in the structure. Glass fiber reinforced plastic (GFRP) profiles are among the most preferred FRP composite materials. GRFP profiles stand out with their high tensile strength, light weight and high corrosion performance. The hybrid use of these materials with classical construction materials offers new advantages. The buckling behavior of the hybrid material formed by placing concrete in plastic state into GFRP box profiles with high tensile strength was investigated in this study. The buckling performance of hybrid columns formed using GFRP profile, normal concrete or reactive powder concrete (RPC) was studied. To this end, normal concrete-GFRP profile and RPC-GFRP profile hybrid columns were produced and buckling testing was performed at different slenderness values. Charts were created after buckling experiments to examine differences in the behavior of the material. As a result of the examinations, the effect of RPC and column slenderness on the buckling performance hybrid columns was identified.

An Investigation of Concrete Strength of Hybrid Construction Materials Under the Effect of Heat

The hybrid use of concrete and Glass Fiber Reinforced Plastic (GFRP) profiles in construction material technologies in recent years offers many new opportunities. Filling fresh concrete into GFRP profile allows for obtaining superior advantages compared to component materials. The purpose of this study is to investigate the change in the strength of concrete in hybrid material exposed to high temperatures. To this end, hybrid compressive samples were prepared by filling GFRP composite box profiles with concrete and plain concrete samples were prepared for comparison. The cubic samples were exposed to high temperatures at 25–200–400–600–800 °C. Strength losses of the plain concrete and the concrete in the hybrid material, which had the same dimensions, under the effect of heat were determined.

INVESTIGATION OF HEAT INSULATION PERFORMANCE OF DIFFERENT WALL VARIETIES USED IN BUILDINGS

In this study, the most preferred types of wall heat insulation performance are determined experimentally. For this purpose, with the actual construction features 1/3 of a reinforced concrete structure can be manufactured and column spans are built with six different wall element. These materials are extensively used in the production of housing; horizontal hollow brick, the vertical hollow brick, pumice, aerated concrete blocks, brick and sandwich wall. A heat source placed inside the model building, with the help of thermo couples fixed to the internal heat is provided. The building operated for 30 days with a heat source to provide heat balance and every wall surface of the thermal images were taken with the camera. The images and heat values are interpreted, heat efficiency of the wall varieties are defined. Consequently, the wall varietiess thermal conductivity resistance, thermal conductivity coefficient and the amount of heat loss have been identified.