Pub Date : 2022-03-01DOI: 10.1080/13287982.2022.2046317
S. Patra, S. Dhar, S. Acharyya
ABSTRACT Dynamic strain ageing or DSA is exhibited by ferrous and aluminium alloys typically at elevated temperatures and low strain rates. This effect, in association with viscoplasticity, produces a complex material behaviour which is manifested through positive strain rate sensitivity of the flow stress in certain pockets of temperatures and strain rates and negative strain rate sensitivity in others. The conventional material models of DSA either lack the ability to accurately capture the DSA effect or to incorporate the effect of the temperature variation. The objective of this work was to propose a constitutive model which can do both. The desired material model was proposed by performing necessary augmentations to a conventional material model. The suitable conventional model for this purpose was identified through rigorous comparison of the existing models. The proposed constitutive model could accurately capture the DSA behaviour of austenitic stainless steel 304 for different strain rates over a range of temperatures across the peak DSA temperatures.
{"title":"Accurate finite element modeling of the mechanical behavior of SS304 across the peak dynamic strain aging temperatures","authors":"S. Patra, S. Dhar, S. Acharyya","doi":"10.1080/13287982.2022.2046317","DOIUrl":"https://doi.org/10.1080/13287982.2022.2046317","url":null,"abstract":"ABSTRACT Dynamic strain ageing or DSA is exhibited by ferrous and aluminium alloys typically at elevated temperatures and low strain rates. This effect, in association with viscoplasticity, produces a complex material behaviour which is manifested through positive strain rate sensitivity of the flow stress in certain pockets of temperatures and strain rates and negative strain rate sensitivity in others. The conventional material models of DSA either lack the ability to accurately capture the DSA effect or to incorporate the effect of the temperature variation. The objective of this work was to propose a constitutive model which can do both. The desired material model was proposed by performing necessary augmentations to a conventional material model. The suitable conventional model for this purpose was identified through rigorous comparison of the existing models. The proposed constitutive model could accurately capture the DSA behaviour of austenitic stainless steel 304 for different strain rates over a range of temperatures across the peak DSA temperatures.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"5 1","pages":"214 - 229"},"PeriodicalIF":1.1,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82918373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-22DOI: 10.1080/13287982.2022.2038406
PhD G M Sadiqul Islam, PhD Ali A. Shubbar, BSc Sudipta Sarker, Research Assistant, PhD Reader Monower Sadique, G. M. Sadiqul, Islam Professor
ABSTRACT The demand for bricks in South Asia is increasing significantly due to growth in the construction sector. Bricks produced using traditional firing technique and fertile clay contribute significantly to some of the worst air pollution in the world. Therefore, the utilisation of other environment-friendly alternative to conventional bricks is considered an urgent need to conserve a clean environment and help in saving its fertile soil. This research aimed to explore geopolymerisation technique with ternary combined industrial waste/by-products as binders including high volume Ladle Furnace Slag (LFS), Fly ash and Ground Granulated Blast Furnace Slag (GGBS) to produce non-fired and clay-free brick alternatives. The first two byproducts are locally produced in the related iron and power industry while GGBS are being imported by the cement industry. The results indicated that all the prepared samples conform to the minimum compressive strength requirement of 20.7 MPa and maximum water absorption rate of 17% for common brick with severe weathering as per ASTM C62. This highly promising performance pronounced the use of locally available high volume LFS and other industrial waste/by-products materials in non-fired building block production to achieve a cleaner, environmental-friendly sustainable society as well as a sustainable route for industrial waste management.
{"title":"Ternary combined industrial wastes for non-fired brick","authors":"PhD G M Sadiqul Islam, PhD Ali A. Shubbar, BSc Sudipta Sarker, Research Assistant, PhD Reader Monower Sadique, G. M. Sadiqul, Islam Professor","doi":"10.1080/13287982.2022.2038406","DOIUrl":"https://doi.org/10.1080/13287982.2022.2038406","url":null,"abstract":"ABSTRACT The demand for bricks in South Asia is increasing significantly due to growth in the construction sector. Bricks produced using traditional firing technique and fertile clay contribute significantly to some of the worst air pollution in the world. Therefore, the utilisation of other environment-friendly alternative to conventional bricks is considered an urgent need to conserve a clean environment and help in saving its fertile soil. This research aimed to explore geopolymerisation technique with ternary combined industrial waste/by-products as binders including high volume Ladle Furnace Slag (LFS), Fly ash and Ground Granulated Blast Furnace Slag (GGBS) to produce non-fired and clay-free brick alternatives. The first two byproducts are locally produced in the related iron and power industry while GGBS are being imported by the cement industry. The results indicated that all the prepared samples conform to the minimum compressive strength requirement of 20.7 MPa and maximum water absorption rate of 17% for common brick with severe weathering as per ASTM C62. This highly promising performance pronounced the use of locally available high volume LFS and other industrial waste/by-products materials in non-fired building block production to achieve a cleaner, environmental-friendly sustainable society as well as a sustainable route for industrial waste management.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"34 1","pages":"163 - 176"},"PeriodicalIF":1.1,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82854700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/13287982.2021.1998994
I. Goodarzi, S. M. Mirhosseini, E. Zeighami
ABSTRACT In this paper, the mechanical properties of High-performance fiber reinforced cementitious composites containing active powders, such as metakaolin and fly ash, with a combination of carbon nanotubes (CNTs) and steel fibers have been investigated. The presence of active powders and their combination with micro-silica, increase the physical and mechanical properties of fibre concrete. Subsequently, by adding CNTs, the precise microstructural properties of concrete before and after 300 cycles of thawing-freezing, according to the ASTMC666 standard by scanning electron microscope (SEM) have been analysed. The results reveal that by adding active powders and steel fibres in the concrete, the volume of cavities reduces, and the bonding between concrete components increases. moreover, the addition of functionalised CNTs creates the crack bridge and prevents the propagation and growth of micro-cracks. This leads to increasing the mechanical properties of concrete before the cycles and decreasing the strength loss (bendingand compressive) after thawing-freezing cycles.
{"title":"Experimental study of the freeze and thaw effects on the mechanical behaviour of self-compacting high-performance fibre-reinforced concrete containing active powders and/or Carbon NanoTubes","authors":"I. Goodarzi, S. M. Mirhosseini, E. Zeighami","doi":"10.1080/13287982.2021.1998994","DOIUrl":"https://doi.org/10.1080/13287982.2021.1998994","url":null,"abstract":"ABSTRACT In this paper, the mechanical properties of High-performance fiber reinforced cementitious composites containing active powders, such as metakaolin and fly ash, with a combination of carbon nanotubes (CNTs) and steel fibers have been investigated. The presence of active powders and their combination with micro-silica, increase the physical and mechanical properties of fibre concrete. Subsequently, by adding CNTs, the precise microstructural properties of concrete before and after 300 cycles of thawing-freezing, according to the ASTMC666 standard by scanning electron microscope (SEM) have been analysed. The results reveal that by adding active powders and steel fibres in the concrete, the volume of cavities reduces, and the bonding between concrete components increases. moreover, the addition of functionalised CNTs creates the crack bridge and prevents the propagation and growth of micro-cracks. This leads to increasing the mechanical properties of concrete before the cycles and decreasing the strength loss (bendingand compressive) after thawing-freezing cycles.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"8 1","pages":"37 - 50"},"PeriodicalIF":1.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85864097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-16DOI: 10.1080/13287982.2021.1989167
A. Sravan Ashwin, A. P, Sreenivasan M.K, S. Rahima Shabeen
ABSTRACT This paper presents a review of the various seismic energy dissipation devices and practices used in recent times. This agenda of discussion is imperative as natural catastrophes, particularly earthquakes are known to be very disastrous. These methodologies have been known to improve structural resilience for the same and therefore proving that investigation on the same would be beneficial in enhancing the safety of structures. This paper has a culmination of research articles published between 2014–2019. Particular focus is given to dampers, damper based hybrid systems as well as the application of dampers in hybrid base isolation systems and in precast connection systems.With the research presented in this paper, there is scope for further investigation and the pragmatic application of the same.
{"title":"SEISMIC ENERGY DISSIPATION SYSTEMS – a REVIEW","authors":"A. Sravan Ashwin, A. P, Sreenivasan M.K, S. Rahima Shabeen","doi":"10.1080/13287982.2021.1989167","DOIUrl":"https://doi.org/10.1080/13287982.2021.1989167","url":null,"abstract":"ABSTRACT This paper presents a review of the various seismic energy dissipation devices and practices used in recent times. This agenda of discussion is imperative as natural catastrophes, particularly earthquakes are known to be very disastrous. These methodologies have been known to improve structural resilience for the same and therefore proving that investigation on the same would be beneficial in enhancing the safety of structures. This paper has a culmination of research articles published between 2014–2019. Particular focus is given to dampers, damper based hybrid systems as well as the application of dampers in hybrid base isolation systems and in precast connection systems.With the research presented in this paper, there is scope for further investigation and the pragmatic application of the same.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"176 1","pages":"1 - 25"},"PeriodicalIF":1.1,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77926912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-21DOI: 10.1080/13287982.2021.1999010
S.M. Hosseini, F. Mashiri, O. Mirza
ABSTRACT A computer-aided engineering (CAE) fatigue life prediction technique is developed in this paper to determine the fatigue strength of bolted shear connectors in composite structures. A relatively new initiative in the composite construction industry is the use of the blind boltshear connector, which provides a sustainable and practical solution to the main limitation of using traditional welded stud regarding reuse of building components. Furthermore, fatigue is one of the major causes involved in fatal mechanical failures of composite structures. However, limited research has been currently undertaken to assess fatigue life of composite structure. Therefore, the fatigue performance of the blind bolt under constant amplitudes cyclic loading has been investigated using ABAQUS/explicit and FE-SAFE programs. First, the dynamic responses of steel-concrete composite structures under sinusoidal load cycles were simulated using ABAQUS/explicit. Then, the stress–strain time history based on the response law of the composite structure was introduced into the FE-SAFE software to obtain a good prediction on the fatigue life of the blind bolt shear connector. As a result, the logarithmic life distributions of the bolted shear connector were calculated using different constant amplitudes.
{"title":"Fatigue performance of bolted shear connectors","authors":"S.M. Hosseini, F. Mashiri, O. Mirza","doi":"10.1080/13287982.2021.1999010","DOIUrl":"https://doi.org/10.1080/13287982.2021.1999010","url":null,"abstract":"ABSTRACT A computer-aided engineering (CAE) fatigue life prediction technique is developed in this paper to determine the fatigue strength of bolted shear connectors in composite structures. A relatively new initiative in the composite construction industry is the use of the blind boltshear connector, which provides a sustainable and practical solution to the main limitation of using traditional welded stud regarding reuse of building components. Furthermore, fatigue is one of the major causes involved in fatal mechanical failures of composite structures. However, limited research has been currently undertaken to assess fatigue life of composite structure. Therefore, the fatigue performance of the blind bolt under constant amplitudes cyclic loading has been investigated using ABAQUS/explicit and FE-SAFE programs. First, the dynamic responses of steel-concrete composite structures under sinusoidal load cycles were simulated using ABAQUS/explicit. Then, the stress–strain time history based on the response law of the composite structure was introduced into the FE-SAFE software to obtain a good prediction on the fatigue life of the blind bolt shear connector. As a result, the logarithmic life distributions of the bolted shear connector were calculated using different constant amplitudes.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"16 1","pages":"59 - 74"},"PeriodicalIF":1.1,"publicationDate":"2021-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75462302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-08DOI: 10.1080/13287982.2021.1998995
X. Feng, Fangfang Zhang, Lixia Guo, L. Zhong
ABSTRACT Cemented sand and gravel (CSG) is a kind of green building material that has emerged in recent years. The cement content has a great impact on the deformation characteristics of CSG, but the current constitutive models cannot reflect this problem. Based on the previous research results, this paper depicted the volume strain and shear strain of CSG, established a nonlinear constitutive model of CSG, and finally verified the new constitutive model with experimental data. Results showed that the model could well simulate the deformation characteristics of the CSG with cement content of more than 40 kg/m3, and the entire stress–strain relationship was basically consistent with the experimental value, reflecting the adaptability and superiority of the nonlinear constitutive model of CSG.
{"title":"A new nonlinear constitutive model of CSG","authors":"X. Feng, Fangfang Zhang, Lixia Guo, L. Zhong","doi":"10.1080/13287982.2021.1998995","DOIUrl":"https://doi.org/10.1080/13287982.2021.1998995","url":null,"abstract":"ABSTRACT Cemented sand and gravel (CSG) is a kind of green building material that has emerged in recent years. The cement content has a great impact on the deformation characteristics of CSG, but the current constitutive models cannot reflect this problem. Based on the previous research results, this paper depicted the volume strain and shear strain of CSG, established a nonlinear constitutive model of CSG, and finally verified the new constitutive model with experimental data. Results showed that the model could well simulate the deformation characteristics of the CSG with cement content of more than 40 kg/m3, and the entire stress–strain relationship was basically consistent with the experimental value, reflecting the adaptability and superiority of the nonlinear constitutive model of CSG.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"3 1","pages":"51 - 58"},"PeriodicalIF":1.1,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75498358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-08DOI: 10.1080/13287982.2021.1999041
Le Li, M. Mahmoodian
ABSTRACT This paper proposes a new method to predict the failure of steel structures subjected to fatigue and corrosion. A model is developed to determine changes in S-N curve of beams (i.e., intact plates) and connections subjected to simultaneous corrosion and fatigue environment. The fatigue damages of beams and connections are then modelled as stochastic processes. The first-passage probability method is used to determine the time-dependent probability of fatigue failure of plates and connections, and then system reliability analysis is carried out for a steel structure as a working example. It has been found that ignoring corrosion effect on S-N curves for beams and connections can lead to underestimation of fatigue life of corroded steel structures. It has also been found that corroded connections can be more vulnerable to fatigue failure than beams. Apart from that, a risk cost optimisation programme is applied to the working example to find the maintenance strategies that ensure the safe operation of steel structures and intend to minimise the total risk. The methodology proposed in this paper can help structural engineers and asset managers on repair and maintenance of steel structures subjected to simultaneous corrosion and fatigue.
{"title":"FATIGUE LIFE PREDICTION AND MAINTAINANCE MANAGEMENT OF STEEL STRUCTURES SUBJECTED TO CORROSION","authors":"Le Li, M. Mahmoodian","doi":"10.1080/13287982.2021.1999041","DOIUrl":"https://doi.org/10.1080/13287982.2021.1999041","url":null,"abstract":"ABSTRACT This paper proposes a new method to predict the failure of steel structures subjected to fatigue and corrosion. A model is developed to determine changes in S-N curve of beams (i.e., intact plates) and connections subjected to simultaneous corrosion and fatigue environment. The fatigue damages of beams and connections are then modelled as stochastic processes. The first-passage probability method is used to determine the time-dependent probability of fatigue failure of plates and connections, and then system reliability analysis is carried out for a steel structure as a working example. It has been found that ignoring corrosion effect on S-N curves for beams and connections can lead to underestimation of fatigue life of corroded steel structures. It has also been found that corroded connections can be more vulnerable to fatigue failure than beams. Apart from that, a risk cost optimisation programme is applied to the working example to find the maintenance strategies that ensure the safe operation of steel structures and intend to minimise the total risk. The methodology proposed in this paper can help structural engineers and asset managers on repair and maintenance of steel structures subjected to simultaneous corrosion and fatigue.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"68 1","pages":"75 - 88"},"PeriodicalIF":1.1,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89084949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1080/13287982.2021.1997369
K. Parackal, J. Ginger, Joshua Eaton
ABSTRACT Recent damage surveys have shown that double-skillion roof houses, characterised by two monoslope roofslopes with a vertical ‘rise’ connecting the upper and lower roof slopes, are vulnerable to cladding and structural failures in windstorms. Wind loading Standards such as AS/NZS 1170.2 do not currently provide pressure coefficients for deriving design wind loads specifically for these types of double-skillion roofs. This paper presents a 1/50 scale wind tunnel model study on a typical double-skillion roof house. The study found that the upper roof slope experiences large suction pressures especially near the upwind corner for oblique approach winds. In addition, the lower roof slope and rise are subjected to large positive pressures. The structure (i.e. rafters) near the end-walls also experiences large hold-down loads. Cladding loads and rafter hold-down loads are significantly larger than values obtained from applying data currently available in AS/NZS 1170.2
{"title":"Wind loads on double-skillion roof houses","authors":"K. Parackal, J. Ginger, Joshua Eaton","doi":"10.1080/13287982.2021.1997369","DOIUrl":"https://doi.org/10.1080/13287982.2021.1997369","url":null,"abstract":"ABSTRACT Recent damage surveys have shown that double-skillion roof houses, characterised by two monoslope roofslopes with a vertical ‘rise’ connecting the upper and lower roof slopes, are vulnerable to cladding and structural failures in windstorms. Wind loading Standards such as AS/NZS 1170.2 do not currently provide pressure coefficients for deriving design wind loads specifically for these types of double-skillion roofs. This paper presents a 1/50 scale wind tunnel model study on a typical double-skillion roof house. The study found that the upper roof slope experiences large suction pressures especially near the upwind corner for oblique approach winds. In addition, the lower roof slope and rise are subjected to large positive pressures. The structure (i.e. rafters) near the end-walls also experiences large hold-down loads. Cladding loads and rafter hold-down loads are significantly larger than values obtained from applying data currently available in AS/NZS 1170.2","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"59 1","pages":"26 - 36"},"PeriodicalIF":1.1,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81130584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-11DOI: 10.1080/13287982.2021.1970700
Liang Su, Jing-Quan Zhang, Yu-Nan Tang, Xin Huang
ABSTRACT An automatic Bayesian modal identification method is proposed using the blind source separation (BSS) technique. The determination of resonant frequency bands, which is the initial step of the fast Bayesian FFT (fast Fourier transform) method, requires human intervention and hence, is labour-intensive and subjective. To automate the determination of resonant frequency bands, the BSS technique is introduced here for band selection process. After estimating the modal responses from measured data, the hump criterion curves are drawn to sharpen the border of the resonant humps. And the frequency bands can thus be determined automatically by locating the resonant humps with a peak picking algorithm. The proposed method was validated with a simulated 6- degree-of-freedom spring-mass model, a simulated 4-story benchmark model, the Heritage Court Tower in Vancouver, Canada. The robust identification results indicate that the proposed method can identify automatically and accurately the physical modes together with their uncertainty.
{"title":"Automatic Bayesian modal identification method for structures based on blind source separation","authors":"Liang Su, Jing-Quan Zhang, Yu-Nan Tang, Xin Huang","doi":"10.1080/13287982.2021.1970700","DOIUrl":"https://doi.org/10.1080/13287982.2021.1970700","url":null,"abstract":"ABSTRACT An automatic Bayesian modal identification method is proposed using the blind source separation (BSS) technique. The determination of resonant frequency bands, which is the initial step of the fast Bayesian FFT (fast Fourier transform) method, requires human intervention and hence, is labour-intensive and subjective. To automate the determination of resonant frequency bands, the BSS technique is introduced here for band selection process. After estimating the modal responses from measured data, the hump criterion curves are drawn to sharpen the border of the resonant humps. And the frequency bands can thus be determined automatically by locating the resonant humps with a peak picking algorithm. The proposed method was validated with a simulated 6- degree-of-freedom spring-mass model, a simulated 4-story benchmark model, the Heritage Court Tower in Vancouver, Canada. The robust identification results indicate that the proposed method can identify automatically and accurately the physical modes together with their uncertainty.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"45 1","pages":"317 - 331"},"PeriodicalIF":1.1,"publicationDate":"2021-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88305024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-30DOI: 10.1080/13287982.2021.1970699
A. Awan, Faiz Shaikh
ABSTRACT This study presents the structural behaviour of tyre-bale sandwich wall under four-point bending and punching shear load. The research entails two stages: (a) full-scale experimental testing and (b) and numerical analysis of a 3D finite element modelling (FEM). In the first stage, two tyre-bale sandwich walls are tested experimentally in flexural bending to investigate the structural behaviour in terms of ultimate load, vertical deflection, strain distribution on the concrete surface, deflected profile, crack pattern and tyre-bale compressibility. The second stage consisted of three phases: (a) validation of the material model and assembly of different parts by comparing load-deflection curve and concrete damage in tension, (b) calibration of punching shear load and boundary conditions using previous experimental research data and (c) study ultimate load and failure mode under punching shear in tyre-bale sandwich wall. The results of the proposed 3D FEM model showed good agreement with experimental work and predicted the failure mechanism with reasonable accuracy. The calibrated model can be used to further investigate the factors affecting the structural behaviour of tyre-bale sandwich walls under different loading conditions. Finally, the strength of reinforced concrete member was confirmed using yield line theory, which showed a fair agreement with the experimental values.
{"title":"Experimental and numerical study on structural behaviour of tyre-bale sandwich wall under different loading conditions","authors":"A. Awan, Faiz Shaikh","doi":"10.1080/13287982.2021.1970699","DOIUrl":"https://doi.org/10.1080/13287982.2021.1970699","url":null,"abstract":"ABSTRACT This study presents the structural behaviour of tyre-bale sandwich wall under four-point bending and punching shear load. The research entails two stages: (a) full-scale experimental testing and (b) and numerical analysis of a 3D finite element modelling (FEM). In the first stage, two tyre-bale sandwich walls are tested experimentally in flexural bending to investigate the structural behaviour in terms of ultimate load, vertical deflection, strain distribution on the concrete surface, deflected profile, crack pattern and tyre-bale compressibility. The second stage consisted of three phases: (a) validation of the material model and assembly of different parts by comparing load-deflection curve and concrete damage in tension, (b) calibration of punching shear load and boundary conditions using previous experimental research data and (c) study ultimate load and failure mode under punching shear in tyre-bale sandwich wall. The results of the proposed 3D FEM model showed good agreement with experimental work and predicted the failure mechanism with reasonable accuracy. The calibrated model can be used to further investigate the factors affecting the structural behaviour of tyre-bale sandwich walls under different loading conditions. Finally, the strength of reinforced concrete member was confirmed using yield line theory, which showed a fair agreement with the experimental values.","PeriodicalId":45617,"journal":{"name":"Australian Journal of Structural Engineering","volume":"PP 1","pages":"299 - 316"},"PeriodicalIF":1.1,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84339963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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