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Full-Text Articles in Engineering
Sensors To Monitor Cfrp/Concrete Bond In Beams Using Electrochemical Impedance Spectroscopy, Sangdo Hong, Ronald S. Harichandran
Sensors To Monitor Cfrp/Concrete Bond In Beams Using Electrochemical Impedance Spectroscopy, Sangdo Hong, Ronald S. Harichandran
Civil Engineering Faculty Publications
The use of inexpensive electrochemical impedance spectroscopy based sensor technology for nondestructive evaluation (NDE) of bond degradation between external carbon fiber-reinforced polymer (CFRP) reinforcement and concrete is examined. Copper tape on the surface of the CFRP sheet, stainless steel wire embedded in the concrete, and reinforcing bars were used as the sensing elements. Laboratory experiments were designed to test the capability of the sensors to detect the debonding of the CFRP from the concrete and to study the effect of short-term (humidity and temperature fluctuations) and long-term (freeze-thaw and wet-dry exposure and rebar corrosion) environmental conditions on the measurements. The …
Nonlinear Model For Reinforced Concrete Under Cyclic Loading, Aly Said, M. Elmorsi, M. Nehdi
Nonlinear Model For Reinforced Concrete Under Cyclic Loading, Aly Said, M. Elmorsi, M. Nehdi
Civil and Environmental Engineering and Construction Faculty Research
Most of the available shear models for reinforced concrete rely on empirical formulations. In this study, a rational shear stress function is used to define the shear stress–strain envelope for reinforced concrete. Cyclic rules are proposed to define the loading, unloading and reloading relationships for reinforced concrete under shear stress reversals. A normal stress function describing the cyclic relationship of concrete under axial stress is also introduced. The proposed functions are verified using experimental data of reinforced concrete panels tested under monotonic and cyclic loading. Subsequently, the normal and shear stress functions along with their cyclic rules are integrated in …
Composite Action Of Structural Steel Beams And Precast Concrete Slabs, Brian Uy, M. A. Bradford
Composite Action Of Structural Steel Beams And Precast Concrete Slabs, Brian Uy, M. A. Bradford
Faculty of Engineering - Papers (Archive)
The innovative composite behavior between structural steel beams and precast concrete slabs for multi-storey buildings is discussed. The issues that need to be resolved in order to establish composite behavior as well as suggestions for future course of action are highlighted.
Composite Steel-Concrete Beams And Columns Fabricated With High Strength Steel (Hss) Plate, Brian Uy
Composite Steel-Concrete Beams And Columns Fabricated With High Strength Steel (Hss) Plate, Brian Uy
Faculty of Engineering - Papers (Archive)
High strength quenched and tempered structural steel has seen widespread implementation in heavily loaded columns in multistorey building construction. However, many current international codes do not cater for the use o f high strength steel and thus much needed research is required to give structural engineers the confidence to use this new and innovative material in a safe and efficient manner in construction. Herein, experiments and analytical studies on composite steel-concrete composite beams and recommendations for modified . design procedures will be summarised. This paper will also provide a comprehensive summary of experimental results on the uses of high strength …
Indentation Fracture Testing Of Nitrided Layers On H11 Tool Steel, David J. Nolan, V. Leskovsek, M. Jenko
Indentation Fracture Testing Of Nitrided Layers On H11 Tool Steel, David J. Nolan, V. Leskovsek, M. Jenko
Faculty of Engineering - Papers (Archive)
Nitriding and nitrocarburising treatments are well accepted methods of improving the wear performance of tool and die steels. However, our understanding of the relationship between nitriding process parameters, microstructure and fracture behaviour of the surface layers is far from complete. Vickers hardness indentations generate radial fractures in brittle surface layers, and it has been shown that the length of these cracks can be used to provide valuable information about the fracture toughness of these layers. This paper describes an investigation of the application of indentation fracture testing to nitrided and nitrocarburized HI 1 hot work tool steel. The results suggest …
Strength Of Concrete-Filled Steel Box Columns With Local Buckling Effects, Qing Quan Liang, Brian Uy, J. Y. Richard Liew
Strength Of Concrete-Filled Steel Box Columns With Local Buckling Effects, Qing Quan Liang, Brian Uy, J. Y. Richard Liew
Faculty of Engineering - Papers (Archive)
The key aspects and features of a nonlinear fiber element analysis method for predicting the strength and behavior of concrete-filled steel box columns with local buckling effects are discussed. The methods is quite useful in predicting the ultimate strengths and behavior of concrete slabs and can also be employed in the advanced analysis of composite frames.