Engineering Commons^™

Investigation Of Fibre Reinforcing The Cover Of Concrete Columns, Muhammad N. S Hadi, Denis Montgomery

Faculty of Engineering - Papers (Archive)

This paper explores the effects of adding synthetic reinforcing fibres to highstrength reinforced concrete columns and in particular only to the cover of the columns. An experimental program was conducted where seven circular reinforced concrete columns were tested with varying fibre content-one contained no fibres, two contained fibres throughout the cross-section and four contained fibres only in the outer concrete. The other column properties were kept the same for all the seven columns. All seven columns were tested by the application of a concentric, axial compression force. It was found that although only minor improvements were noticeable for a fibre …

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.

Modelling Shearing Characteristics Of Reinforced Concrete, Hossein Jalalifar, Najdat I. Aziz, Muhammad N. S Hadi

Faculty of Engineering - Papers (Archive)

Numerical modeling represents the most versatile computational method for various engineering disciplines. Nowadays, numerical modelling is extensively used in civil and mining applications because of cost and risk problems associated with excessive field studies, particularly in ground control applications. In this study, the behaviour of shearing a fully grouted bolt with regard to assessing strata reinforcement (particularly in shearing) has been simulated. In addition, the effect of both different rock strength and different pretensioning levels with 3D numerical simulation are analysed. It was found that the strength of surrounding material contributed to the increased resistance of the installation and has …

Fibre Reinforcing Concrete Columns, Muhammad N. S Hadi, Denis Montgomery

Faculty of Engineering - Papers (Archive)

This paper explores the effects of adding steel fibres to high-strength reinforced concrete columns and in particular only to the cover of the columns. An experimental program was conducted where seven circular reinforced concrete columns were tested with varying fibre content - one contained no fibres, three contained fibres throughout the cross-section and three contained fibres only in the outer concrete. The other column properties were kept the same for all the seven columns. All seven columns were tested by the application of a concentric, axial compression force. It was found that although only minor improvements were noticeable fora fibre …

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 …

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.

The Effect Of Resin Thickness On Bolt-Grout-Concrete Interaction In Shear, Najdat I. Aziz, Jalalifar Hossein, Muhammad N. S Hadi

Faculty of Engineering - Papers (Archive)

Numerical modelling is extensively used in civil and mining engineering applications because of cost and risk problems associated with different experimental studies. In this study, the effect of resin thickness was evaluated in bolt-grout-concrete interaction and bending behaviour of a fully grouted bolt installed across joints in post failure region. Tests were conducted in 20 and 40 MPa concretes, and modelling simulations were made, using ANSYS version 8.1, to include both with and without different pretension loads. It was found that in all resin thickness, both the strength of the concrete and bolt pretension had major influences on the shear …

Effect Of Helical Pitch And Tensile Reinforcement Ratio On The Concrete Cover Spalling Off Load And Ductility Of Hsc Beams, Nuri M. Elbasha, Muhammad N. S Hadi

Faculty of Engineering - Papers (Archive)

[extract] In recent years a marked increase in the use of High Strength Concrete (HSC) has been evident in Australian building construction despite the fact that the current Australian design standard, AS3600 provides no design rules. HSC has been used extensively in civil construction projects world wide because it reduces the cross section and the weight for long construction members.

High strength concrete and high strength steel are used together to increase the load capacity and reduce the beams' cross section. Using these two materials to design over reinforced beams will lead to huge reduction of cost, which is a …