Sensitivity analysis of Life Cycle Assessment to select reinforced concrete structures with one-way slabs

Ferreiro‐Cabello, Javier; Fraile-García, Esteban; Cámara, Eduardo Martínez; Perez-de-la-Parte, M.

doi:10.1016/j.engstruct.2016.11.059

Cited by 26 publications

(13 citation statements)

References 40 publications

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“…So far, some studies have coupled LCA and structural analysis to study RC structures based on the EHE-08 standard [43,44]. Pujadas-Gispert et al [40] did compare the LCA results of shallow foundations depending on design parameters defined in EHE-08 and EUROCODE [45].…”

Section: Discussionmentioning

confidence: 99%

Environmental effects of using different construction codes applied to reinforced concrete beam designs based on Model Code 2010 and Spanish Standard EHE-08

Almirall

Petit‐Boix

Sanjuan-Delmás

et al. 2019

Engineering Structures

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Assuming specific behavior models, the variety of design codes currently used for the design of concrete beams inevitably results in different solutions, ensuring service during the expected lifetime with a maximum functional quality and safety. However, from a sustainable design perspective, such differences may have remarkable environmental impacts. This paper analyses if the approach of the newest design code, i.e., the Model Code, leads to a reduction in resource consumption and greenhouse gas emissions (GHG) over the life cycle of concrete beams. To do so, a comparative analysis of the environmental impact of concrete beams was carried out depending on the reference code used for their design (i.e., EHE-08 or Model Code). The results show that reducing the amount of reinforcing steel is essential to minimize the life cycle environmental impacts of concrete beams.Every country may have its own design codes and, thus, the reinforcing steel use can vary for structures subjected to the same loads and with equivalent structural reliability. Hence, regulations play a key role in the sustainability of construction assets. Conclusions depend on the beam's length (L), height (h) and characteristic compressive strength (fck). For short beams (4 m), the greater the h, the greater the reinforcement difference between the two codes. With regard to beams with L = 8 m, these differences can lead to varying steel and GHG savings, e.g., up to 5.0 % with MC-2010 (h = 0.6 m and fck ≤ 35 MPa), almost 40 % with EHE -08 (h = 0.6 m and 35 MPa < fck ≤ 50 MPa) and more than 30 % with MC-2010 (h = 1.0 m).. For long beams (L = 12.0 m), steel consumption is 0.3 % to 19 % lower when the beam is designed with EHE-08, and this difference decreases as fck increases.

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Section: Discussionmentioning

confidence: 99%

Environmental effects of using different construction codes applied to reinforced concrete beam designs based on Model Code 2010 and Spanish Standard EHE-08

Almirall

Petit‐Boix

Sanjuan-Delmás

et al. 2019

Engineering Structures

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“…Various papers have been published on this specific topic in recent years. In particular, it is worth highlighting the results of the work dealing with flat slabs as presented in [40] as well as the sensitivity analysis of the life-cycle assessment in [41], which proves how transport and material waste are significant parameters. CO 2 emissions were the focus of [42,43], which dealt with slab life-cycle optimization.…”

Section: Introductionmentioning

confidence: 92%

Reinforced Concrete Slab Optimization with Simulated Annealing

Stochino

López-Gayarre

2019

Applied Sciences

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Featured Application: An optimization method, based on Simulated Annealing, is developed for the design of reinforced concrete slab.Abstract: Flat slabs have several advantages such as a reduced and simpler formwork, versatility, and easier space partitioning, thus making them an economical and efficient structural system. When producing structural components in series, every detail can lead to significant cost differences. In these cases, structural optimization is of paramount relevance. This paper reports on the structural optimization of reinforced concrete slabs, presenting the case of a rectangular slab with two clamped adjacent edges and two simply supported edges. Using the yield lines method and the principle of virtual work, a cost function can be formulated and optimized using simulated annealing (SA). Thus, the optimal distribution of reinforcing bars and slab thickness can be found considering the flexural ultimate limit state and market materials costs. The optimum result was defined by the orthotropic coefficient k = 8, anisotropic coefficient g = 1.4, and slab thickness H = 11.8 cm. A sensitivity analysis of the solution was developed considering different material costs.

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“…Additionally, the importance of evaluating each of the stages that make up the LC of each structure has been established; for example, B1-7 should be considered in terms of the climatic zone in which it is built, as its variations with regard to the other stages (production, execution, and demolition) may reach up to 140% [60]. For its part, transport (present in all stages of the LC) is a factor causing fluctuations in the environmental impact (varying from reductions of 65.66% to increases of 18.24%), depending on the project's location as explained by Ferreiro-Cabello et al [61].…”

Section: Introductionmentioning

confidence: 99%

An Epitome of Building Floor Systems by Means of LCA Criteria

Valencia-Barba

Gómez-Soberón

et al. 2020

Sustainability

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Studies of the elements that make up the structure of a building have generally focused on topics related to their physical and structural capacities. Although research has been carried out into environmental impact during the life cycle stages, the environmental profile is far from established. This research aims to reduce the gap in the knowledge of this subject, offering useful information to professionals in the construction industry, which will enable them to consider environmental aspects when choosing the best construction systems. The present study applies the methodology of the life cycle assessment (LCA), to analyze and compare four floor construction systems in two different scenarios (“A” with a functional homogeneous unit of 1 m2 and “B” with 1 m² made up of the percentages of the floor system and the special areas of the building). The analysis is performed using the LCA Manager software, along with the Ecoinvent 3.1 database and with a cradle to handover perspective (A1–A5). Comparison was made using two environmental impact methodologies, Eco-indicator 99 and CML 2001. The results highlight the stages A1–A3 as those that generate the greatest environmental impact. Comparing the environmental profiles of the different floor systems, one-way floor systems I and II had the best environmental scores, 30% less than two-way floor system III and 50% less than slab floor system IV.

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Sensitivity analysis of Life Cycle Assessment to select reinforced concrete structures with one-way slabs

Cited by 26 publications

References 40 publications

Environmental effects of using different construction codes applied to reinforced concrete beam designs based on Model Code 2010 and Spanish Standard EHE-08

Environmental effects of using different construction codes applied to reinforced concrete beam designs based on Model Code 2010 and Spanish Standard EHE-08

Reinforced Concrete Slab Optimization with Simulated Annealing

An Epitome of Building Floor Systems by Means of LCA Criteria

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