Periodic Reporting for period 1 - GRE.A.TE.R.S. (GREen Advanced TEchnologies for the Retrofitting of masonry Structures)
Okres sprawozdawczy: 2019-11-01 do 2021-10-31
1. The pandemic caused some delays to our experimental programme and some of the results are still being finalised.
2. The development of NTRM strengthening solutions specific for masonry structures in terms of both structural compatibility and performance can considerably reduce the costs associated with the strengthening and rehabilitation of the existing building stock. In addition, the application of NTRM systems does not require trained labour, thus making this technology suitable for upgrading deficient buildings and infrastructure not only in Europe, but also in developing and underdeveloped countries. NTRM-based systems will also provide optimal solutions for key heritage structures, for which compatibility with the substrate and full reversibility of the intervention are paramount.
The exploitation of natural fibres and lime based mortars will also limit the use of energy-intensive resources (advanced fibres, polymers and cement) and potentially boost local economies. The outcome of this work will contribute to achieve a more sustainable construction practices, reduce waste production and pressure on raw materials, and improve resource energy efficiency.
Research. To continue to grow our research ambition, activity and excellence and to enhance our reputation for research excellence from fundamentals to application. Deliver on our strong REF position. Grow our activity to help mitigate other in year effects.
Environment. To foster the collegiate and caring nature of the department. With focus on our individual and overall well being. Support and encourage all to achieve their potential, recognise and appreciate the need for focus on areas of excellence and the value of this in the overall contribution.
The project has studied a novel strengthening solution that uses natural fibre meshes embedded in an inorganic lime-mortar matrix. The new system will provide a more sustainable and cost‐effective alternative to both traditional methods and advanced composite systems and will provide a more reliable solution that can be engineered to meet the specific performance criteria of masonry buildings. In addition, this NTRM strengthening system has been compared to the more spread FRCM strengthening system, such as SRG and BTRM.
2. The development of NTRM strengthening solutions specific for masonry structures in terms of both structural compatibility and performance can considerably reduce the costs associated with the strengthening and rehabilitation of the existing building stock. In addition, the application of NTRM systems does not require trained labour, thus making this technology suitable for upgrading deficient buildings and infrastructure not only in Europe, but also in developing and underdeveloped countries. NTRM-based systems will also provide optimal solutions for key heritage structures, for which compatibility with the substrate and full reversibility of the intervention are paramount.
The exploitation of natural fibres and lime based mortars will also limit the use of energy-intensive resources (advanced fibres, polymers and cement) and potentially boost local economies. The outcome of this work will contribute to achieve a more sustainable construction practices, reduce waste production and pressure on raw materials, and improve resource energy efficiency.
Research. To continue to grow our research ambition, activity and excellence and to enhance our reputation for research excellence from fundamentals to application. Deliver on our strong REF position. Grow our activity to help mitigate other in year effects.
Environment. To foster the collegiate and caring nature of the department. With focus on our individual and overall well being. Support and encourage all to achieve their potential, recognise and appreciate the need for focus on areas of excellence and the value of this in the overall contribution.
The project has studied a novel strengthening solution that uses natural fibre meshes embedded in an inorganic lime-mortar matrix. The new system will provide a more sustainable and cost‐effective alternative to both traditional methods and advanced composite systems and will provide a more reliable solution that can be engineered to meet the specific performance criteria of masonry buildings. In addition, this NTRM strengthening system has been compared to the more spread FRCM strengthening system, such as SRG and BTRM.
1. Experimental and numerical investigation to develop a better understanding of the mechanical performance of FRCM (SRG, NTRM, BTRM)
2. Study the effect of critical parameters by extending the experimental database with validated non-linear finite element models to enable the development of design‐oriented tools for a variety of fibre architectures and fibre-matrix combinations.
3. Assess the efficiency of the developed NTRM strengthening systems at improving the seismic performance of representative substandard buildings through non‐linear time‐history analyses.
4. Evaluation of guidelines for the characterisation and design of FRCM-based strengthening solutions in line with European and US standards (e.g. AC434 and ACI459) to enable a faster uptake of the developed systems.
5. Contribute to current knowledge and enhance interaction between researchers, industry members, authorities, contractors, engineers and all relevant stakeholders, promoting a more holistic approach to the maintenance and protection of existing buildings.
2. Study the effect of critical parameters by extending the experimental database with validated non-linear finite element models to enable the development of design‐oriented tools for a variety of fibre architectures and fibre-matrix combinations.
3. Assess the efficiency of the developed NTRM strengthening systems at improving the seismic performance of representative substandard buildings through non‐linear time‐history analyses.
4. Evaluation of guidelines for the characterisation and design of FRCM-based strengthening solutions in line with European and US standards (e.g. AC434 and ACI459) to enable a faster uptake of the developed systems.
5. Contribute to current knowledge and enhance interaction between researchers, industry members, authorities, contractors, engineers and all relevant stakeholders, promoting a more holistic approach to the maintenance and protection of existing buildings.
1. Development of the experimental set-up for the mechanical characterization of single fibres, to be applied within the RILEM TC 190.
2. Procedure for the numerically calibration of the tau-slip bond behaviour at the mortar-to-fiber interface for FRCM from experimental tests.
3. Durability tests on FRCM.
2. Procedure for the numerically calibration of the tau-slip bond behaviour at the mortar-to-fiber interface for FRCM from experimental tests.
3. Durability tests on FRCM.