Assessment of Steel-CLT Composite Floor Systems: Advancing material-efficient and environmentally friendly construction

With the building and construction sector accounting for a significant portion of final energy use and emissions, and society’s increasing focus on environmental awareness and improvements, the impor- tance of sustainable construction has never been greater. The utilisation of timber in construction offers clear sustainability benefits and has...

Enhanced Simulation of Guided Waves and Damage Localization in Composite Strips Using the Multiresolution Finite Wavelet Domain Method

A multiresolution finite wavelet domain method, that utilizes Daubechies wavelet and scaling functions for the hierarchical approximation of state variables, is presented. The multiresolution approximation yields a hierarchical set of equations of motion involving the coarse component of generalized displacements, while additional equations...

Shear performance of replaced bolt shear connectors in prefabricated composite beams

Bolt shear connectors have the advantage of efficient installation and demolition when used in prefabricated composite beams. When bolt shear connectors are damaged in the service period and replaced by new ones, the shear performance of replaced bolts is to be affected by the existing structural damage. This paper investigates the shear...

Economic viability of demountable steel-concrete composite beams

Composite beams are commonly used in current design practice due to their efficient material use and competitive execution. The shear connection is mainly achieved by means of headed studs welded on the top flange. However, the welded connectors obstruct the possibility of a non‐destructive disassembly required to reuse the steel beams and...

Proof of concept of a demountable steel-concrete flooring system

Environmental concerns steerthe construction industry towards more sustainable developmentssuch asdemountable and reusablestructures. Composite structures are a frequent solution for multi-story buildings and bridges, however the use of welded shear connectors requires labour and energy intensive disassembly. Two bays of a demountable flooring...

A static and free vibration analysis method for non-prismatic composite beams with a non-uniform flexible shear connection

Steel-concrete composite beams are widely used in practice because of their economic cross-section design. As sustainability becomes more and more important in the construction industry, the design of composite beams must be adapted to meet the requirements of the circular economy. This calls for demountability and reusability of the structural...

Two-scale modelling of composite 'steel-reinforced resin' interaction (INTERMOD): Towards reusable and demountable structures & infrastructure

Steel-concrete composite beams are widely used in practice because of the simple construction sequence and the economic cross-section design. The application of welded headed studs in composite beams prevents the non-destructive separation of the composite beam, which leads to a very low scoring in the sustainability assessment in terms of the...

Assessment of demountable steel-concrete composite flooring systems

Sustainability concerns steer the construction sector towards adopting a circular economy philosophy. Steel-concrete composite beams are extensively used in multi-story buildings and bridges due to their competitive construction and efficient material use. Currently the composite action is mainly achieved by headed shear connectors welded to the...

Flexible shear connectors in a tapered composite beam optimized for reuse

Composite beams are frequently used because of their competitive combination of a steel beam and a concrete deck. Further optimization of composite beams is possible through use of tapered steel beams. In terms of material reuse, composite structures generally underperform, because of the concrete casted in-situ. The most common shear connector...

Optimization of a composite (steel-concrete) floor system for fast execution and easy demolition

One of the increasingly important parameters in the construction sector is the time required for the execution and easy demounting of a structure. The goal of this paper is to provide insight into an on-going research focusing on structural performance of large prefabricated concrete decks connected by a demountable shear connectors. A large...

A demountable structural system of multi-story building: Case study of car park building

The growth of world population will be the challenge of the century regarding the carbon footprints. The human activities produce both direct and indirect carbon emission that is contributing to the climate change. The construction industry itself contributes around 30 percent of total carbon emissions in the world. Thus, the challenge is to...

Multi-objective optimization of laminated composite beam structures using NSGA-II algorithm

The paper deals with the multi-objective optimization problems of laminated composite beam structures. The objective function is to minimize the weight of the whole laminated composite beam and maximize the natural frequency. In particular, the simultaneous use of all the design variables such as fiber volume fractions, thickness and fiber...