Han Fang

• BEng, PhD
• Lecturer at University of Leeds

Measuring the time-dependent deformations of concrete is essential to ensure the serviceability and durability of reinforced concrete (RC) structures. Until recently, however, it remains largely unknown the time-dependent performance of concrete with limestone calcined clay cement (LC 3) during their service life. To address this research gap, this...

Timber shell structures are material efficient over large spans, and environmentally friendly due to the renewable nature of the material. In realising such structures, digital fabrication and assembly techniques provide new opportunities for the accurate conversion of complex digital designs into real components, allowing the generation of interlo...

With the trend of achieving both energy efficiency in buildings and occupants’ comfort, gamification strategies have started to be developed and applied as incentive mechanisms to increase social interaction and facilitate human energy behavior transformation. In this article, 306 published papers are reviewed, and 21 studies are identified to dete...

Cross-sectional behaviour for high strength steel (HSS) hexagonal hollow section (HexHS) stub columns under combined compression and bending is studied and presented in this paper. Finite element models were developed and validated using the existing experimental data collated from the previous research. Upon the validated finite element models, ex...

The aim of this study is to identify the most effective design variables for structural systems that can reduce the embodied carbon of buildings and to assess the significance of each variable. Consequently, the main target is to achieve an optimized structural design in terms of environmental performance by improving design decisions at the early...

Steel T-welded joint structures have been largely applied in aerospace and marine infrastructures. The weld length in T-weld joint structures is usually long, and it is difficult to access the weld conditions for damage detection purposes. This is due to the T-welded joint structure possessing a more complex cross-section than the conventional weld...

The local buckling behaviour of cold-formed high strength steel (HSS) irregular hexagonal hollow section (IHexHS) stub columns under concentric compression is studied numerically in this paper. Finite-element (FE) models were developed and validated against the experimental data. The validated FE models were employed to conduct extensive parametric...

A systematic experimental and numerical investigation on the behaviour of octagonal concrete-filled steel tube short columns fabricated with S690 high-strength steel and C90 high-strength concrete, and subjected to combined compression and bending is reported in this paper. Experiments were firstly performed on twelve short column specimens with di...

Comprehensive experimental and numerical investigations into the structural behaviour of cold-formed high-strength steel (HSS) irregular octagonal hollow sections (IOctHS) are presented in this paper. A total of 13 IOctHS stub columns were tested. Material properties measurements were conducted on the tensile coupons taken from both parent plates a...

The behaviour of cold-formed normal- and high-strength steel columns with square and rectangular hollow sections (SHSs and RHSs) at elevated temperatures was investigated numerically in this paper. A finite element model was developed and validated against experimental results for the cold-formed steel SHS and RHS stub and long columns tested at am...

This paper presents a comprehensive experimental investigation into the structural behaviour of the high strength steel (HSS) hexagonal hollow sections (HexHS) stub columns under concentric compression. A total of 18 HSS HexHS stub columns encompassing three fabrication routes were performed. The HSS plates used to fabricate the specimen were deliv...

This paper presents an experimental investigation on the material properties variation and residual stress distribution within the cold-formed high strength steel (HSS) irregular hexagonal hollow sections (IHexHS) with two different fabrication methods. The test specimens were manufactured through press-braking and gas metal arc welding (GMAW). Ten...

A R T I C L E I N F O Keywords: Irregular hexagonal sections Local buckling behaviour Cold-forming effect High strength steel Design methods A B S T R A C T Comprehensive experimental investigations into the material properties and stub column behaviour of cold-formed high strength steel (HSS) irregular hexagonal hollow sections (IHexHS) are presen...

A systematic investigation into the variation of the material properties and residual stress distribution across cold-formed high strength steel (HSS) irregular octagonal hollow sections (IOctHS) is presented in this paper. The specimens were fabricated through welding the two cold-formed half-sections by gas metal arc welding (GMAW). Non-destructi...

Local buckling behaviour of welded high strength steel (HSS) I-sections subjected to bending is crucial for structural designs, and has been found to be affected by the interactive effect between flanges and web. To realize accurate designs considering the local buckling behaviour, the continuous strength method (CSM), direct strength method (DSM)...

This paper presents an experimental investigation on the material properties variation and residual stress distribution within the high strength steel (HSS) hexagonal hollow sections. Three different fabrication routes encompassing welding or combinations of welding and press-braking were employed for fabricating the HSS hexagonal sections. HSS pla...

Structural timber is one of the commonly used construction materials. Timber can contain natural internal defect such as knot or natural decay due to its anatomical complexity. Moreover, internal damages or stiffness reductions can also be induced by environmental and biological factors such as weathering and termite attacks. This hidden internal d...

Materials research has shown geopolymer concrete has the potential to significantly improve the sustainability of concrete construction. In this study, the structural performance of geopolymer concrete-filled steel tube members to take advantage of the beneficial confinement from the outer steel tubes is investigated experimentally and numerically....

This study is initiated by the increasing use of steel tubular members with octagonal hollow sections (OctHSs) in civil structures. Previous studies primarily focused on the local buckling behaviour of cold-formed steel OctHSs. However, investigations on the global buckling behaviour of OctHS long columns remain scarce. Thus, the main objective of...

Behavior of geopolymer concrete-filled circular steel tube members was experimentally investigated. Four column specimens and one beam specimen were prepared using fly-ash based geopolymer concrete. The material properties for both circular steel tubes and the geopolymer concrete infill were measured. The column specimens were tested under concentr...

This paper presents a comprehensive experimental and numerical study on the structural performance of concrete-filled cold-formed high-strength steel octagonal tubular stub columns. Stub column specimens formed using high-strength steel and infilled concrete with grades C50 and C90, and with three different plate width-to-thickness ratios were test...

In recent years, octagonal steel hollow sections (OctHSs) have attracted significant interests from researchers and engineers, and OctHSs have been employed in civil engineering applications. However, designs of OctHSs are not included in structural steel design codes. This paper therefore presents comprehensive numerical analyses on the stub colum...

An experimental and numerical study on the octagonal high-strength steel tubular stub columns under combined compression and bending is presented in this paper. Octagonal high-strength steel tubular stub column specimens with different sizes were prepared. Experiments were performed on these specimens under concentric compression or eccentric compr...

This paper investigates the behavior of octagonal high-strength steel tubular cross sections under axial compression. Experimental investigations were conducted on cross sections with three nominal dimensions fabricated from different routes of welding or combinations of cold-bending and welding. Material properties and geometric imperfections of t...

The global buckling resistance of welded high strength steel box section members subject to combined compression and bending was investigated through a numerical modelling programme. Finite element models were developed with the capability to accurately replicate the experimental results of the box section members under combined compression and ben...

The resistance of axially-loaded hot-finished S460 and S690 steel square hollow stub columns at elevated temperatures was investigated in this study through finite element modelling. Finite element models were developed and validated against test results on hot-finished S460 and S690 steel square hollow stub columns under axial compressive loading....

This paper presents an experimental investigation to quantify the variation of material properties and residual stresses in the octagonal high strength steel hollow sections from different fabrication routes involving welding or combinations of welding and press-braking. Tensile coupon tests were conducted on the specimens extracted from different...

This paper presents an investigation on the structural performance of welded S460 steel columns under axial compression at elevated temperatures using finite element analysis. Stub and long columns with box and H- sections were considered. A new stress-strain curve model for S460 steel at elevated temperatures was proposed and adopted to obtain the...

Steel structures subject to fire require fire resistance design to protect the lives of occupants and reduce the structural damage and failures. The fire resistance design incorporates the estimation of the thermomechanical behaviours of the structures based on the development of temperatures of the structural elements subject to fire in which the...

Properties of shape memory alloys during phase transformation are strongly affected by the heating rate based on the kinetics of phase transformation. A new mathematical approach, named Linearity method, was developed for estimating the kinetic parameters and degree of phase transformation at different heating rates. This method was found to be mor...

The effect of heating/cooling rates on the material properties of NiTi wires was investigated experimentally. The specific heat capacity during phase transformation was found to be significantly sensitive to the heating/cooling rate. Contrary to the traditional perception, the phase transformation temperatures under stress were found to be dependen...

Steel thermal properties determination is essential in steel structure temperature prediction for structural fire design or metallurgical evaluation. Thermal properties include specific heat, thermal expansion and heat transfer coefficients. Since the steel thermal properties variation at high temperature may be considered as a chemical process, ki...