Design optimization of hybrid steel/timber structures for minimal environmental impact and financial cost: A case study

Cauteren, Dieter Van; Ramon, Delphine; Stroeckx, J.; Allacker, Karen; Schevenels, Mattias

doi:10.1016/j.enbuild.2021.111600

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…Improvements in structural properties are made to adapt to functional requirements Lagaros (2014), , Yang et al (2010) and Systems (2005) Environmental impact minimization Optimization of structure to minimize its impact on the environment, including emissions of gases, structure in water and material impact on aquatic species Lagaros (2018), Lim and Park (2009), de Medeiros and Kripka (2014) and Van Cauteren et al (2022) Multi-objective Process of multiple objectives from all those mentioned above Al-Saadi et al (2021), Marler and Arora (2004), Zavala et al (2014a) and Quaglia et al (2014) Table 1.…”

Section: Structural Performance Developmentmentioning

confidence: 99%

A review on developing optimization techniques in civil engineering

Zaheer

Manzoor²,

Ahamad³

2023

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PurposeThe purpose of this article is to analyze the optimization process in depth, elaborating on the components of the entire process and the techniques used. Researchers have been drawn to the expanding trend of optimization since the turn of the century. The rate of research can be used to measure the progress and increase of this optimization procedure. This study is phenomenal to understand the optimization process and different algorithms in addition to their application by keeping in mind the current computational power that has increased the implementation for several engineering applications.Design/methodology/approachTwo-dimensional analysis has been carried out for the optimization process and its approaches to addressing optimization problems, i.e. computational power has increased the implementation. The first section focuses on a thorough examination of the optimization process, its objectives and the development of processes. Second, techniques of the optimization process have been evaluated, as well as some new ones that have emerged to overcome the above-mentioned problems.FindingsThis paper provided detailed knowledge of optimization, several approaches and their applications in civil engineering, i.e. structural, geotechnical, hydraulic, transportation and many more. This research provided tremendous emerging techniques, where the lack of exploratory studies is to be approached soon.Originality/valueOptimization processes have been studied for a very long time, in engineering, but the current computational power has increased the implementation for several engineering applications. Besides that, different techniques and their prediction modes often require high computational strength, such parameters can be mitigated with the use of different techniques to reduce computational cost and increase accuracy.

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Section: Structural Performance Developmentmentioning

confidence: 99%

A review on developing optimization techniques in civil engineering

Zaheer

Manzoor²,

Ahamad³

2023

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“…proach and without evaluating possible trade-offs among life cycle stages: eco-efficient material choices [23][24][25]; design optimization to reduce environmental and economic impacts [26,27]; circular economy in the construction sector [28,29], or design for deconstruction/disassembly [29][30][31]; design for flexibility and adaptability [29,30]; reuse of structural elements [32][33][34], particularly of steel [35][36][37] and timber [38,39] structures; RC aggregate recycling [40]; advantages and drawbacks of prefabrication [41,42], etc. In the following, an overview of the main design choices and strategies available to enhance the sustainability of buildings from the early stages of design is presented, possible trade-offs and drawbacks are evaluated, and the possibility to combine more than one strategy to achieve the new LCT-based design objectives is addressed.…”

Section: Lct Approach For the Design Of Building Retrofit Interventionsmentioning

confidence: 99%

“…The new European framework Level (s) for sustainable buildings [22] allows for the inclusion of sustainability objectives from an early stage of the design (level 1), but, similarly to green building rating systems, it is quite a rigid framework, which does not allow one to consider specific needs of stakeholders or regions (for example, the same indicators potentially apply to areas prone to earthquakes, flood, or drought, thus overlooking the possible impact variations from one region to another). Many other studies focus just on one of these design objectives, without adopting a comprehensive approach and without evaluating possible trade-offs among life cycle stages: eco-efficient material choices [23][24][25]; design optimization to reduce environmental and economic impacts [26,27]; circular economy in the construction sector [28,29], or design for deconstruction/disassembly [29][30][31]; design for flexibility and adaptability [29,30]; reuse of structural elements [32][33][34], particularly of steel [35][36][37] and timber [38,39] structures; RC aggregate recycling [40]; advantages and drawbacks of prefabrication [41,42], etc.…”

Section: Lct Approach For the Design Of Building Retrofit Interventionsmentioning

confidence: 99%

“…Material optimization is a strategy that prompts designers to reduce materials to their bare minimum, according to construction codes, avoiding surplus and standardization of elements. Especially in the design of structures, this strategy may lead to a reduction in material consumption, and consequently in the related impacts [22,26,27]; however, this principle is in contrast with the previous one, and a trade-off must be found during the design process.…”

Section: Lct-based Design Choices and Strategies At The Construction ...mentioning

confidence: 99%

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The LCT Challenge: Defining New Design Objectives to Increase the Sustainability of Building Retrofit Interventions

et al. 2022

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The decarbonization of the construction sector, which is one of the most impactful sectors worldwide, requires a significant paradigm shift from a linear economy to a circular, future-proofed and sustainable economy. In this transition, the role of designers and structural engineers becomes pivotal, and new design objectives and principles inspired by Life Cycle Thinking (LCT) should be defined and included from the early stages of the design process to allow for a truly sustainable renovation of the built environment. In this paper, an overview of LCT-based objectives and principles is provided, critically analyzing the current state of the art of sustainability and circularity in the construction sector. The effectiveness of applying such design principles from the early stages of the design of retrofit interventions is then demonstrated with reference to a case study building. Four seismic retrofit alternatives made of timber, steel and concrete, conceived according to either LCT principles or traditional, were designed and compared to a demolition and reconstruction scenario on the basis of five common environmental impact indicators. The indicators were calculated adopting simplified LCA analyses based on Environmental Product Declarations (EPDs), considering the product and End of Life stages of the building. The results of the comparative analyses confirm that LCT-based retrofit solutions are less impactful than both the traditional seismic retrofit interventions and the demolition and reconstruction scenario.

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