Simulating reactive soil and substructure interaction using a simplified hydro-mechanical finite element model dependent on soil saturation, suction and moisture-swelling relationship

Teodosio, Bertrand; Baduge, Shanaka Kristombu; Mendis, Priyan

doi:10.1016/j.compgeo.2019.103359

Cited by 19 publications

(41 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The global performance of the developed prefabricated footing systems were investigated using a multi-criteria analysis incorporating: (1) the structural performance using a coupled hydromechanical finite element model by [18]; (2) licycle cost analysis; and (3) life cycle assessment considering energy and GHG. The results of the multi-criteria analysis are outlined below.…”

Section: Resultsmentioning

confidence: 99%

“…The developed prefabricated footing system had a constant floor area of 225 m 2 (15 by 15 m 2 ), since the average floor area of single-detached dwellings in Australia is approximately 230 m 2 [18].…”

Section: The Developed Prefabricated Footingmentioning

confidence: 99%

“…An advanced three-dimensional coupled hydromechanical finite element model, developed and validated by Teodosio et al [18], Teodosio et al [27], was used to investigate the structural performance of a prefabricated footing system. Fluid diffusion in an isotropic porous soil medium was modelled as [28,29]:…”

Section: Structural Performance Using a Hydromechanical Modelmentioning

confidence: 99%

“…The shrink-swell soil movement causes structural deformation through soil-structure interaction. This is crucial for lightweight structures such as houses, garages and pavements [18,19]. Repair cost amounts to billions of dollars worldwide to mitigate the damage induced by the shrinking and swelling of reactive soils [13,[20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multi-Criteria Analysis of a Developed Prefabricated Footing System on Reactive Soil Foundation

Teodosio

Bonacci²,

Seo

et al. 2021

Energies

Self Cite

View full text Add to dashboard Cite

The need for advancements in residential construction and the hazard induced by the shrink–swell reactive soil movement prompted the development of the prefabricated footing system of this study, which was assessed and compared to a conventional waffle raft using a multi-criteria analysis. The assessment evaluates the structural performance, cost efficiency, and sustainability using finite element modelling, life cycle cost analysis, and life cycle assessment, respectively. The structural performance of the developed prefabricated system was found to have reduced the deformation and cracking by approximately 40%. However, the cost, GHG emission, and embodied energy were higher in the prefabricated footing system due to the greater required amount of concrete and steel than that of the waffle raft. The cost difference between the two systems can be reduced to as low as 6% when prefabricated systems were installed in a highly reactive sites with large floor areas. The life cycle assessment further observed that the prefabricated footing systems consume up to 21% more energy and up to 18% more GHG emissions. These can significantly be compensated by reusing the developed prefabricated footing system, decreasing the GHG emission and energy consumption by 75–77% and 55–59% with respect to that of the waffle raft.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: The Developed Prefabricated Footingmentioning

confidence: 99%

Section: Structural Performance Using a Hydromechanical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multi-Criteria Analysis of a Developed Prefabricated Footing System on Reactive Soil Foundation

Teodosio

Bonacci²,

Seo

et al. 2021

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, the majority of the work has been focused on understanding the interactions involved in the soil-atmospheric boundary investigating soil-moisture dynamics and related changes in effective stress and stress-strain behaviour [16,[21][22][23][24][25][26][27][28]. One of the problems that is likely to worsen due to climate change and has been paid limited attention in the literature is reactive soil movement and its effects on shallow lightweight structures such as pavements, pipelines, or footings for residential buildings [29][30][31][32][33]. Approximately 30% of Australia's surface soil can be classified as reactive (also known as expansive soils).…”

Section: Introductionmentioning

confidence: 99%

Changes in Thornthwaite Moisture Index and Reactive Soil Movements under Current and Future Climate Scenarios—A Case Study

et al. 2021

View full text Add to dashboard Cite

Expansive soils go through significant volume changes due to seasonal moisture variations resulting in ground movements. The ground movement related problems are likely to worsen in the future due to climate change. It is important to understand and incorporate likely future changes in design to ensure the resilience of structures built on such soils. However, there has been a limited amount of work quantifying the effect of climate change on expansive soils movement and related behaviour of structures. The Thornthwaite Moisture Index (TMI) is one of the commonly used climate classifiers in quantifying the effect of atmospheric boundary on soil behaviour. Using the long-term weather data and predicted future changes under different emission scenarios, a series of TMI maps are developed for South Australia. Potential changes in ground movement are then estimated for a selected area using a simplified methodology where the effect of future climate is captured through changes in TMI. Results indicate that South Australia is likely to face a significant reduction in TMI under all emission scenarios considered in this study. The changes in TMI will lead to a considerable increase in potential ground movement which will influence the behaviour of structures built on them and in some areas may lead to premature failure if not considered in the design.

show abstract

Design of prefabricated footing connection using a coupled hydro‐mechanical finite element model

Teodosio

Baduge

Mendis

2021

Structural Concrete

View full text Add to dashboard Cite

The use of prefabricated systems can alleviate the inadequate housing and skilled workers in most developed countries by expediting required construction time, reducing material wastage, decreasing the effect of weather impacts, minimizing unexpected costs, skilled labor dependence, and construction hazards. The full potential of prefabricated construction is yet to be realized in part due to most advancements being focused on its superstructure. The development of prefabricated substructures for lightweight buildings needs to consider the susceptibility to damage induced by the shrink‐swell movement of expansive soils causing significant global financial losses. Prefabricated substructures should have robust connections in discontinued regions to transfer forces and moments. Due to these issues, the aim of this study is to develop a connection for prefabricated raft substructures of single‐detached dwellings on expansive soils using a combined soil‐structure contact analysis and strut‐and‐tie model approach. The developed substructure system was validated using experiments and further investigated through numerical simulations. The developed prefabricated connection was observed to have satisfactory performance, potentially overcoming most construction limitations of conventional monolithic cast‐in‐place raft substructures, such as faster, safer, and more sustainable construction, while providing comparable strength and serviceability.

show abstract

Simulating reactive soil and substructure interaction using a simplified hydro-mechanical finite element model dependent on soil saturation, suction and moisture-swelling relationship

Cited by 19 publications

References 45 publications

Multi-Criteria Analysis of a Developed Prefabricated Footing System on Reactive Soil Foundation

Multi-Criteria Analysis of a Developed Prefabricated Footing System on Reactive Soil Foundation

Changes in Thornthwaite Moisture Index and Reactive Soil Movements under Current and Future Climate Scenarios—A Case Study

Design of prefabricated footing connection using a coupled hydro‐mechanical finite element model

Contact Info

Product

Resources

About