Search results

The purpose of this paper is to discuss the performance of efficient cold-formed steel (CFS) sections in building a truss system. A comparative study was performed comparing trusses built with cold-formed and hot-rolled sections.

Medium-scale specimens were fabricated and tested under monotonic loading. Closed CFS sections (tubular sections) were adopted as compression members of the truss, against the open sections (angle sections) in the hot-rolled steel truss. While as open sections (angle sections) were adopted as tension members in both these cases, the performance assessment was made on the basis of the peak loads carried by the trusses, the vertical deflections and the failure modes exhibited.

The results of this study indicated that the overall strength, strength-to-weight ratio and overall convenience in terms of cost and fabrication, in the CFS truss was better than that of the hot-rolled one. Also, the judicious utilization of steel which has limited reserves can be achieved.

Cold-formed and hot-rolled sections are widely used in the steel structures. There are advantages and disadvantages in using each of these configurations, discussed in this work. The advantages are widely known by the scientific community; however, few studies are developed with the purpose of quantifying the gains of each solution. Thus, this work emerges with great innovation, with regard to the experimental evaluation of the trusses' behavior composed of different structural sections.

The purpose of this paper is to evaluate the fatigue process through the dynamic analysis of the global structural model and local static sub-modelling in a critical detail using the hot-spot stress approach. The detail was studied in three different positions at the “Alcácer do Sal” access viaduct, and the methodologies from the IIW and Eurocode EN 1993-1-9 were compared.

In this study, the fatigue life process based on the hot-spot stress approach was evaluated using a global dynamic analysis and a local sub-modelling based on a static analysis of welded connections in the “Alcácer do Sal” railway structure, Portugal, taking into consideration the recommendations from IIW and Eurocode EN 1993-1-9. The hot-spot stresses were calculated through the static analysis of the sub-model of the welded connection for each vibration mode with the aim to obtain the temporal stresses using the modal coordinates and modal stresses of the extrapolation points. The Ansys® and Matlab® softwares were used for the numerical analysis and the hot-spot stress calculations, respectively.

The proposed methodology/approach to obtain fatigue assessment is based on the modal analysis of the global structural model and local static sub-modelling. The modal analysis was used to extract the boundary conditions to be used in the local model to determine the temporal stresses of the extrapolation points. Based on the modal superposition method, the stresses as function of time were obtained for fatigue life evaluation of a critical detail by the hot-spot stress approach. The detail was studied in three different positions.

In the present study, a global-local fatigue methodology based on dynamic analysis of the global structural model and local static sub-modelling of the critical detail using the hot-spot stress approach is proposed. Herein, the modal analysis of the global structural model supported by the modal superposition method was used to obtain the matrix of modal coordinates. The static analysis of the local sub-model for each mode from the modal analysis of global structural model was done to estimate the hot-spot stresses. The fatigue damage calculation was based on S-N curve of the critical detail and rainflow method. The IIW recommendation proved to be more conservative compared to the proposed rules in the Eurocode EN 1993-1-9. The global-local modelling based on dynamic analysis is an important and effective tool for fatigue evaluation in welded joints.

The purpose of this viewpoint paper is to discuss whether children can play a role in the sustainability of the tourism industry as a whole.

The paper is based on a literature review of key terms: sustainable tourism; mountain tourism; children; and empowerment.

Children could potentially play a role in the sustainability of tourism if they are empowered to do so. mini-clubs in mountain resorts could, for instance, contribute to their social empowerment using a catalytic strategy.

Practitioners involved in the sustainability of the tourism industry should investigate ways to make the sustainability endeavour of the industry more inclusive. As for academics, they should devote time for research on children, as they are an important stakeholder group for the industry.

This paper focusses on children in the tourism industry. There is a dearth of research in this area.

The purpose of this paper is to identify and systematize journal articles that relate to new product development (NPD) within a circular economy (CE) and to present an integrative framework.

It was conducted a qualitative research based on a systematic review of the literature.

As results, it is presented the identification of the main practices and actions of CE applied to NPD, as well as the drivers, barriers and the stakeholders involved in the integration between CE and NPD.

The main contributions of this research are: mapping the state-of-the-art on the topic and systematizing the existing knowledge; providing useful insights for product development professionals considering adopting CE practices and tools in their NPD processes; and presenting a unique, integrative framework to guide organizations’ actions.

Today's business leaders must navigate through challenging turmoil, such as pandemics or black swans. Preparing enterprises for survival and superior rivalry requires capabilities for securing profitability, adaptability, and corporate renewal on an ongoing basis. In this chapter, we introduce a model that enables event-driven navigation through turbulent times – in helping companies move beyond the traditional strategic management and elevate their enterprise onto a higher playing field.

This study uses the antecedents, decisions and outcomes (ADO) framework to identify how perceived risks and benefits relate to the omnichannel strategy and influence consumer behavior.

A systematic review was conducted on 111 articles (2014–2023) on Scopus using NVivo® software for content analysis.

The literature on omnichannel is fragmented between journals and lines of research, making it difficult to identify influential journals in the area and preventing effective convergence. When the perception of risk is greater than the perception of benefits, companies must understand how to mitigate the risk, so that the adoption of an omnichannel strategy is not canceled.

The review is limited to one database and does not consider specific products/services or consumer profiles.

This review broadens understanding of omnichannel from a perspective neglected by researchers, namely risks and benefits and their impacts on organizational results. The model will clarify how the literature on omnichannel has evolved and instigate new research.

The case is suitable for undergraduate and MBA courses: strategic management, social entrepreneurship.

Masters, Bachelors.

In Fortaleza, January 2008, an urban microfinance manager and the planning committee of Crediamigo, Brazil's largest microfinance institution need to devise an entry strategy to Rio de Janeiro's microfinance market. A part of the Banco do Nordeste, and a regional development bank for ten years, Crediamigo has 400,000 clients in the Northeast of Brazil. Its objective is to double its clients base for 2011; Rio de Janeiro's market was the next priority. Crediamigo has two options. The first consists of partnering with VivaCred, a small experienced microcredit non-governmental organization (NGO) which operates in Rio de Janeiro's slums. VivaCred was a microfinance NGO with relatively low organizational capabilities and with a low performance in terms of loan repayment. Its lending methodologies were different from Crediamigo's experience. The second option was to set up a new branch of Crediamigo in Rio and to shape it in Crediamigo's image. The committee was aware that this, “far away from home”, would be a costly and slow venture.

After using this case, students will: have been exposed to the strategic, managerial and operational challenges of microfinance expansion in an emerging country; understand better the market entry strategy (acquisition/integration of an organization vs green field) in such a context; have discussed the conditions related to the replication of microcredit methodologies (individual, group and village lending methodologies) in their contexts of operations.

Teaching notes are available for educators only. Please contact your library to gain login details or email support@emeraldinsight.com to request teaching notes.