Thermomechanical performance of cold-formed steel structures in fire

Advanced analysis for the assessment of steel frames in fire

Dual-3D hybrid fire simulation for modelling steel structures in fire with column failure

Research on seismic resilience evaluation index of mid-rise CFS structures

Probabilistic seismic performance of steel structures with FVDs designed by DDBD procedure

Introduction of the lightweight cold-formed steel (CFS) sections to building construction has been well-established these days due to its high structural performance, corrosion resistance, ease of construction and maintenance as well as aesthetic appearance. In the early of 21th century, researchers found out that the structural performance of the CFS can be improved significantly by integrating it with other materials, for instance, concrete, to create the composite system. This is due to concrete material is excellent in compression but less effective to resist tension force. There were little works being carried out and lack of technical literature regarding on the composite connections for CFS structural frames, especially on the composite beam-to-column joints. This paper aims to collect and review on the previous researches of composite joints for CFS structures from the past two decades. The review is made in three distinctive topics i.e. CFS beam-to-column joints, composite beam-to-slab joints and composite beam-to-column joints. Most of the investigations indicated that composite joint yields higher ultimate load and moment resistance compared to the non-composite joint.

Coupled element and structural level optimisation framework for cold-formed steel frames

Cold-formed thin-walled steel buildings adopt the process of layered assembly, which is easy to disassemble and assemble and conforms to the requirements of industrial construction. But there is no clear method of seismic design. Taking a cold-formed thin-walled light steel structure house in Dazhou city as an example, the Pivot connection unit that can characterize the structural damage and the finite element software SAP2000 are used to establish a model, then this model is used to analyse the basic dynamic characteristics of structures and to analyze the time-history response of structures under seismic action. The results show that the simplified modeling analysis of the structure has a strong feasibility, and the lateral stiffness of the structure can resist the action of multiple earthquakes. Under the action of rare earthquake, the displacement between the layers of the structure is lower than the limit of the code, and the hysteretic performance of the structure is good, which can ensure the safety and reliability of the structure.

The Direct Strength Method (DSM) design rules for cold-formed steel members have been incorporated recently into the North American specification for the design of cold-formed steel structural members (AISI S100-12) and the Australian cold- formed steel structures standard (AS/NZS 4600:2005). The method covers the design of structures with and without holes subjected to compression and bending and without holes for shear. Recent research has extended the DSM to the design of beams with holes predominantly in shear. This paper reviews the DSM design guidelines for perforated members in compression and bending and the latest research on the DSM for perforated beams in shear.

Analysis and design reliability of axially compressed members with high-strength cold-formed thin-walled steel

A numerical investigation of new types of bolted joints for cold-formed steel moment-resisting frame buildings

Finite element modelling of composite cold-formed steel flooring systems

Using capacity of cold-formed steel sections increases thanks to the opportunities which are offered by the developing technology. Low production cost and variety of profiles that can be produce easy, fast, high quality provide to improve its popularity as a structural material. In production, Sulphur and Phosphorous accumulation region occurs at intersection region of flanges and web of hot rolled steel profile. This causes to decrease strength of profile. Other difference between cold-formed and hot rolled steel sections is that mechanical properties of steel material homogeneously distributes throughout the profile. Both in frame and truss systems, cold-formed steel profiles develop both as main and secondary bearing element. These present variety options to the designers with pure, galvanized, aluminized applications. As with many building materials, mechanical behavior of cold-formed steel profile is quite complex due to the nature of thin walled steel sections. Design and analysis methods of cold-formed steel profile are rapidly shaped day by day. The general theory of beams investigated in past studies make possible analyses of cold-formed steel profile. Moreover, in structural systems, using of cold-formed steel profile provide height strength besides sustainable, environmentalist, green building because it requires less material and cost. Although these profiles have many advantages, use of cold-formed steel profiles in our country structures is rather limited unfortunately. New steel construction regulations in Turkey also do not mention cold-formed thin walled steel structure. Main purpose of this study reviews structural specifications of cold-formed steel profiles which are applied world-wide.

As the Key Components of a Horizontal Axis Tidal Current Energy(HATCE) Turbine, the Blades will be Affected by the Force of the Fluid when the Turbine is Working, which also Results in a Possible Effect on the Safety and Stability of the Tidal Current Energy Turbine. Thus, both the Structural Performance and Energy-Catching Efficiency of HATCE Turbine should be Paid Equal Attention. in this Study, Basing on the Workbench, the Energy-Catching Efficiency and Structure Performance of the Designed HATCE Turbine with Stainless Steel and Structural Steel at the Different Current Speeds are Comparatively Studied Using Unidirectional FSI Analysis Method. it can be Concluded that the Output Power of the Turbine is Lower at a Low Current Speed but its Energy-Catching Efficiency is Higher and Vise Versa. as a Result of Structure Performance Analysis, the Designed Turbine has Adequate Safetyunder all Loaded Conditions. Thus, the Designed Turbine Models are Available.

This report compares the performance of steel and composite structures under blast loading using ETABS 2016.A five-storey building is used as a case study and subjected to different blast scenarios.The displacement, stress, strain, failure modes, energy absorption, and ductility of the structures are evaluated and compared.The factors that affect the response of the structures are also examined.The results show that composite structures have better performance than steel structures in terms of displacement, stress, failure modes, and energy absorption.However, steel structures have higher ductility than composite structures.The report provides recommendations for the design of steel and composite structures under blast loading.

Seismic characteristics of hybrid cold-formed steel wall panels