Versatility of steel in correcting construction deficiencies and in seismic retrofitting of RC buildings

Foraboschi, Paolo

doi:10.1016/j.jobe.2016.10.003

Cited by 59 publications

(23 citation statements)

References 49 publications

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“…• strengthening of the existing structure with conventional techniques (jacketing with RC, steel, or fiber-reinforced polymers) and/or addition of extra structural members (pillars, shear walls, beams, foundations) [20,21]; and • installation of base isolators and/or energy dissipation devices [22][23][24][25].…”

Section: Current Seismic Retrofit Strategiesmentioning

confidence: 99%

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Greca

Margani

2018

Sustainability

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Abstract:One of the main challenges of the twenty-first century is to increase the sustainability level of our cities. However, a town, to be considered sustainable, must, above all, be safe, particularly against natural hazards, which in Europe are mostly related to climate changes (e.g., hurricanes, floods, storms, and landslides) and seismic events (earthquakes). Unfortunately, sustainability is still not a prerogative of most European cities, especially those placed in seismic countries such as Italy, where at least 50% of the residential stock is earthquake-prone, while over 80% of the same stock is highly energy-consuming and carbon dioxide-emitting, thus contributing to trigger hazards related to climate changes. In this context, renovation actions, which combine both energy and seismic issues are strongly needed. Nevertheless, several technical, organizational and financial barriers considerably limit the real possibility to extensively undertake this kind of renovation. This study analyzes such barriers, with particular reference to the Italian scenario, suggesting and discussing possible solutions and underlining the advantages of increasing energy and seismic performances at the same time. The proposed solutions may be effectively extended to many other countries with similar socio-economic scenarios.

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Section: Current Seismic Retrofit Strategiesmentioning

confidence: 99%

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Greca

Margani

2018

Sustainability

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“…However, it is important to underline that welding generates induced stresses and local effects (reduction of section, imperfections, stress concentration, and so on), which cannot be properly taken into account through an FE analysis at the panel scale [22,24,28,29]. A complete understanding of local behavior around the contact area between connectors and welded mesh is possible only through future experimental campaigns or local FE models.…”

Section: Fe Resultsmentioning

confidence: 99%

“…These studies focus on the compression load (axial and eccentric) [5,6,[8][9][10][11], flexural load [12][13][14][15][16][17][18][19], and dynamic load [20,21] of these components, and they provide evidence of the key role of connectors in both structural and thermal performances [22].…”

Section: Introductionmentioning

confidence: 99%

A More Sustainable Way for Producing RC Sandwich Panels On-Site and in Developing Countries

et al. 2017

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Abstract:The purpose of this work is to assess if traditionally used welded connectors for joining the two skins of reinforced concrete (RC) sandwich panels, used as structural walls and horizontal structural elements, can be substituted with bent ones. In this way, the scope of the effort is to reduce drastically the energy required during manufacturing, thus having a much more sustainable building product. Wire mesh on site production, in fact, requires a large amount of energy for the welding process, as stated by several Environmental Product Declaration (EPD). In addition, the production of sandwich panels with bent connectors requires a low level of automation and no qualified labor allowing the diffusion in developing countries. The procedures used to execute the work were both experimental and numerical. Structural performances were examined by testing full-scale sandwich panels under (axial and eccentric) compression and flexural loads. Additionally, a Finite Element (FE) study was developed to investigate and to optimize the dimension of welded mesh and the number of connectors. The major findings show that it is possible to substitute welded connectors with bent ones without compromising the structural performance of the tested RC sandwich panels, thus having a more sustainable way for producing these last ones.

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“…Ding Yang et al [12] proposed a rapid assessment method by introducing the substructure model based on the alternative path method(APM). P. Foraboschi [13,14] designed and constructed a test building to investigate the progressive collapse assessment of steel moment-frames with composite floor slabs, which took full advantage of the properties, capabilities and opportunities afforded by steel.…”

Section: Introductionmentioning

confidence: 99%

Progressive Collapse Assessment of the Steel Moment-frame with Composite Floor Slabs Based on Membrane Action and Energy Equilibrium

Shi¹,

Wang²,

Dong³

2017

TOBCTJ

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Background and Objective:Progressive collapse resistance of the steel moment-frame with composite floor slabs can be assessed by sudden column loss scenarios. In order to investigate the progressive collapse-resistant capacity of the steel moment-frame with composite floor slabs, a simplified approach based on the theory of membrane action and energy equilibrium principle is presented, which assessed the behaviour of progressive collapse resistance of this frame subjected to the removal of a penultimate column via the static and dynamic analysis. Mateial and Method:The residual vertical bearing capacity model considering of the membrane action and tie force (TF) method of composite floor slabs is developed to evaluate the force mechanism of the composite floor slabs. An energy-based theoretical framework is proposed for calculating the maximum allowable dynamic demands based on the nonlinear static Pulldown analysis, which is used to explore the relationship between of dynamic and static response in the progressive collapse process. Furthermore, the finite element software SAP2000 is used to calculate the numerical example to verify the reliability of this simplified approach. Results:The results show that the composite floor slabs significantly improve the structural progressive collapse-resistant ability and this simplified approach evaluates the progressive collapse resistance of the whole structure effectively. Conclusion:The existence of the floor can increase the ductility of the structure, and increase the progressive collapse-resistant ability. The appropriate value of the DIF depends on the ductility and amount of inelastic action the structure would experience during the column removal scenario.

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Versatility of steel in correcting construction deficiencies and in seismic retrofitting of RC buildings

Cited by 59 publications

References 49 publications

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

A More Sustainable Way for Producing RC Sandwich Panels On-Site and in Developing Countries

Progressive Collapse Assessment of the Steel Moment-frame with Composite Floor Slabs Based on Membrane Action and Energy Equilibrium

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