{"title":"Application of artificial neural networks for hydrological modelling in Karst","authors":"S. Lakušić","doi":"10.14256/JCE.1594.2016","DOIUrl":"https://doi.org/10.14256/JCE.1594.2016","url":null,"abstract":"","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66962252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Davor Skejić, Ivan Rogic, Ana Šitum, D. Lange, L. Boström
Experience shows that the assessment of fire resistance of steel elements based on European standards is conservative, while advanced methods are complex and time consuming. The analysis of existing methods for the tested steel beam exposed to bending and standard ISO fire was conducted in the scope of the international Round Robin study. The comparison of results shows that advanced methods provide nonuniform assessments. Nevertheless, advanced methods are necessary for improving standard methods that overestimate fire resistance of this "trivial" problem.
{"title":"Assessment of methods for calculating fire resistance of a steel beam","authors":"Davor Skejić, Ivan Rogic, Ana Šitum, D. Lange, L. Boström","doi":"10.14256/JCE.2211.2017","DOIUrl":"https://doi.org/10.14256/JCE.2211.2017","url":null,"abstract":"Experience shows that the assessment of fire resistance of steel elements based on European standards is conservative, while advanced methods are complex and time consuming. The analysis of existing methods for the tested steel beam exposed to bending and standard ISO fire was conducted in the scope of the international Round Robin study. The comparison of results shows that advanced methods provide nonuniform assessments. Nevertheless, advanced methods are necessary for improving standard methods that overestimate fire resistance of this \"trivial\" problem.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66965744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Main parameters for the construction of stone bridges, and major factors for selection of new (replacement) stone and mortar, are presented in the paper. Laboratory test results are given for the stone and mortar normally used in the rehabilitation and reconstruction of cultural and historical heritage structures from the Ottoman period in Bosnia and Herzegovina. A special attention is paid to physical and mechanical characteristics of tufa, travertine and limestone, as basic materials used in the construction of such structures.
{"title":"Stone and mortar in bridges from the Ottoman period in Bosnia and Herzegovina","authors":"A. Kurtović, Naida Ademović","doi":"10.14256/jce.2003.2017","DOIUrl":"https://doi.org/10.14256/jce.2003.2017","url":null,"abstract":"Main parameters for the construction of stone bridges, and major factors for selection of new (replacement) stone and mortar, are presented in the paper. Laboratory test results are given for the stone and mortar normally used in the rehabilitation and reconstruction of cultural and historical heritage structures from the Ottoman period in Bosnia and Herzegovina. A special attention is paid to physical and mechanical characteristics of tufa, travertine and limestone, as basic materials used in the construction of such structures.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66965078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Ćetković, Slobodan Lakić, M. Knežević, P. Bogdanović, M. Žarković
A simulation of a financial and socio-economic analysis of a regional landfill construction project is conducted in the paper on a hypothetical example. The analysis showed that certain investment projects, particularly in developing countries, have a low or negative rate of financial profitability, due to the need to define a socioeconomically acceptable price. The final decision on the implementation of these projects is taken after conducting an appropriate socioeconomic analysis. Projects that are technically feasible and financially sustainable, but not commercially profitable, are suitable for public funding.
{"title":"Financial and socioeconomic analysis of waste management projects","authors":"J. Ćetković, Slobodan Lakić, M. Knežević, P. Bogdanović, M. Žarković","doi":"10.14256/JCE.1874.2015","DOIUrl":"https://doi.org/10.14256/JCE.1874.2015","url":null,"abstract":"A simulation of a financial and socio-economic analysis of a regional landfill construction project is conducted in the paper on a hypothetical example. The analysis showed that certain investment projects, particularly in developing countries, have a low or negative rate of financial profitability, due to the need to define a socioeconomically acceptable price. The final decision on the implementation of these projects is taken after conducting an appropriate socioeconomic analysis. Projects that are technically feasible and financially sustainable, but not commercially profitable, are suitable for public funding.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66963967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bridge response to predefined loading schemes is described and recorded by instrumenting the structure with deflectometers and accelerometers. Test results suggest that although vertical deflections of mid-spans are almost constant for all crossing speeds, the root mean square of acceleration values are positively correlated with the crossing speed. Field test results are then used to calibrate and verify the 3D finite element model of the bridge, and the latter is employed to assess behaviour of the structure at the serviceability limit state.
{"title":"Assessing safety of a railway stone arch bridge by experimental and numerical analyses","authors":"S. Lakušić","doi":"10.14256/JCE.1612.2016","DOIUrl":"https://doi.org/10.14256/JCE.1612.2016","url":null,"abstract":"Bridge response to predefined loading schemes is described and recorded by instrumenting the structure with deflectometers and accelerometers. Test results suggest that although vertical deflections of mid-spans are almost constant for all crossing speeds, the root mean square of acceleration values are positively correlated with the crossing speed. Field test results are then used to calibrate and verify the 3D finite element model of the bridge, and the latter is employed to assess behaviour of the structure at the serviceability limit state.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47822259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recycled asphalt is used in this paper as replacement for a part of cement in the production of cement composite. A part of cement was replaced with a sieved recycled asphalt powder in the proportion of 5 to 15 % of the cement weight. The testing comprised the analysis of density, Blaine specific surface area, setting time, particle size distribution, compressive strength, resistance to freezing and thawing, water absorption, and the SEM-EDS and XRD analyses. The results show that the density, compressive strength, and Blaine surface area decrease, and that toughness increases, with an addition of recycled asphalt into cement composite.
{"title":"Mechanical properties of mortar containing recycled asphalt","authors":"O. C. Sola, C. Ozyazgan","doi":"10.14256/JCE.1684.2016","DOIUrl":"https://doi.org/10.14256/JCE.1684.2016","url":null,"abstract":"Recycled asphalt is used in this paper as replacement for a part of cement in the production of cement composite. A part of cement was replaced with a sieved recycled asphalt powder in the proportion of 5 to 15 % of the cement weight. The testing comprised the analysis of density, Blaine specific surface area, setting time, particle size distribution, compressive strength, resistance to freezing and thawing, water absorption, and the SEM-EDS and XRD analyses. The results show that the density, compressive strength, and Blaine surface area decrease, and that toughness increases, with an addition of recycled asphalt into cement composite.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66963187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The investigation of flexural behaviour of ferrocement elements that are used as permanent formwork in conventional reinforced concrete members is presented in the paper. Individual ferrocement panels are tested under two-point and midpoint load, and the load-deflection behaviour is then studied. The ferrocement panels are provided with shear connectors to investigate interaction between ferrocement and conventional RC members. The experimental results are compared with those obtained through finite element models using the ANSYS software, and a good correspondence of these results was established.
{"title":"Experimental and numerical analysis of ferrocement RC composite","authors":"S. Lakušić","doi":"10.14256/JCE.1799.2016","DOIUrl":"https://doi.org/10.14256/JCE.1799.2016","url":null,"abstract":"The investigation of flexural behaviour of ferrocement elements that are used as permanent formwork in conventional reinforced concrete members is presented in the paper. Individual ferrocement panels are tested under two-point and midpoint load, and the load-deflection behaviour is then studied. The ferrocement panels are provided with shear connectors to investigate interaction between ferrocement and conventional RC members. The experimental results are compared with those obtained through finite element models using the ANSYS software, and a good correspondence of these results was established.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66963929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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