An original procedure for static design of movable in-plane frame structures is presented in the paper. The presented design procedure was derived using the modified traditional Cross procedure (TCP). The introduction of the TCP modification has resulted in significant improvement of the design algorithm of movable frame structures as compared to TCP, especially as to elimination of the need to conduct greater number of individual iteration procedures, and to solve linear algebraic equation systems.
{"title":"Design of movable frame structures using modified Cross procedure","authors":"","doi":"10.14256/jce.1881.2016","DOIUrl":"https://doi.org/10.14256/jce.1881.2016","url":null,"abstract":"An original procedure for static design of movable in-plane frame structures is presented in the paper. The presented design procedure was derived using the modified traditional Cross procedure (TCP). The introduction of the TCP modification has resulted in significant improvement of the design algorithm of movable frame structures as compared to TCP, especially as to elimination of the need to conduct greater number of individual iteration procedures, and to solve linear algebraic equation systems.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66964291","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}
Pervious concrete is a special type of concrete that differs from ordinary concrete by its highly porous nature, which is why this type of discrete material can not be modelled using the Finite Element Method (FEM). Behaviour of pervious concrete samples with different aggregate sizes and void ratios is simulated in the paper, using the Particle Flow Code (PFC) software, which is based on the discrete element method (DEM). The PFC software is used to simulate various experimental results obtained on high paste content pervious concrete samples.
{"title":"Performance based simulation of pervious concrete using discrete element method","authors":"Ashfaque Ansari, Mukund M. Mahajan","doi":"10.14256/jce.2424.2018","DOIUrl":"https://doi.org/10.14256/jce.2424.2018","url":null,"abstract":"Pervious concrete is a special type of concrete that differs from ordinary concrete by its highly porous nature, which is why this type of discrete material can not be modelled using the Finite Element Method (FEM). Behaviour of pervious concrete samples with different aggregate sizes and void ratios is simulated in the paper, using the Particle Flow Code (PFC) software, which is based on the discrete element method (DEM). The PFC software is used to simulate various experimental results obtained on high paste content pervious concrete samples.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14256/jce.2424.2018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66966397","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}
U radu je prikazana simulacija i eksperimentalno istraživanje utjecaja indirektne zelene fasade (IZF) na toplinsko ponašanje zgrade. Istraživanje je provedeno na lokaciji Punat na otoku Krku u Hrvatskoj tijekom ljeta 2018. godine. Primjenom IZF-a utjecaj sunčevog zračenja smanjen je do 505 W/m2, a temperature na vanjskoj površini fasade smanjene su do 13,5 K. Eksperimentalni su rezultati korišteni za simuliranje toplinske ugodnosti u unutrašnjosti zgrade primjenom jednostavnog modela. Kada je IZF postavljen preko čitavog zida izloženog suncu, prosječno smanjenje operativne temperature iznosilo je do 6 K za novu zgradu, tj. do 5 K za tradicionalnu kamenu kuću.
{"title":"Indirect green façade as an overheating prevention measure","authors":"Valentina Lesjak, M. Košir","doi":"10.14256/jce.2797.2019","DOIUrl":"https://doi.org/10.14256/jce.2797.2019","url":null,"abstract":"U radu je prikazana simulacija i eksperimentalno istraživanje utjecaja indirektne zelene fasade (IZF) na toplinsko ponašanje zgrade. Istraživanje je provedeno na lokaciji Punat na otoku Krku u Hrvatskoj tijekom ljeta 2018. godine. Primjenom IZF-a utjecaj sunčevog zračenja smanjen je do 505 W/m2, a temperature na vanjskoj površini fasade smanjene su do 13,5 K. Eksperimentalni su rezultati korišteni za simuliranje toplinske ugodnosti u unutrašnjosti zgrade primjenom jednostavnog modela. Kada je IZF postavljen preko čitavog zida izloženog suncu, prosječno smanjenje operativne temperature iznosilo je do 6 K za novu zgradu, tj. do 5 K za tradicionalnu kamenu kuću.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66967170","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}
Glued laminated timber (GLT) made of hardwood is a modern construction product developed in line with the current changes in the forestry industry. In the last decade studies on hardwoods (deciduous) such as beech, oak, chestnut and ash have been intensively conducted in Europe. The results of those studies are GLT with favourable mechanical characteristics and provisional approvals for their use in construction. This paper presents an overview of currently approved GLT made of hardwood, relevant wood species and adhesive types in their production, as well as currently applicable numerical models.
{"title":"Application of hardwood for glued laminated timber in Europe","authors":"I. Glavinić, I. Boko, N. Torić, J. Vranković","doi":"10.14256/jce.2741.2019","DOIUrl":"https://doi.org/10.14256/jce.2741.2019","url":null,"abstract":"Glued laminated timber (GLT) made of hardwood is a modern construction product developed in line with the current changes in the forestry industry. In the last decade studies on hardwoods (deciduous) such as beech, oak, chestnut and ash have been intensively conducted in Europe. The results of those studies are GLT with favourable mechanical characteristics and provisional approvals for their use in construction. This paper presents an overview of currently approved GLT made of hardwood, relevant wood species and adhesive types in their production, as well as currently applicable numerical models.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66966758","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}
{"title":"Seismic vulnerability of an existing strategic RC building using non linear static and dynamic analyses","authors":"S. Lakušić","doi":"10.14256/jce.2122.2017","DOIUrl":"https://doi.org/10.14256/jce.2122.2017","url":null,"abstract":"","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66965324","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}
Rails are a part of track structure where corrosion process inevitably occurs, except if they are fully insulated and devoid of contact with any other part of the structure (sleepers, fastening accessories) or electrolyte like moist soil or water in track structure. Corrosion occurs much faster in the presence of stray currents, which very soon results in the loss of material at the rail foot. The paper presents an overview and description of parameters influencing stray current levels, such as electrical potential in rail and longitudinal rail conductivity, rail-to-earth electrical resistance, electrical conductivity of load-bearing concrete layers of truck structure, and electrical conductivity of soil.
{"title":"Corrosion and stray currents at urban track infrastructure","authors":"K. Vranešić, S. Lakušić, M. Serdar","doi":"10.14256/jce.2909.2020","DOIUrl":"https://doi.org/10.14256/jce.2909.2020","url":null,"abstract":"Rails are a part of track structure where corrosion process inevitably occurs, except if they are fully insulated and devoid of contact with any other part of the structure (sleepers, fastening accessories) or electrolyte like moist soil or water in track structure. Corrosion occurs much faster in the presence of stray currents, which very soon results in the loss of material at the rail foot. The paper presents an overview and description of parameters influencing stray current levels, such as electrical potential in rail and longitudinal rail conductivity, rail-to-earth electrical resistance, electrical conductivity of load-bearing concrete layers of truck structure, and electrical conductivity of soil.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66967730","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}
{"title":"Experimental study on the strength of lightweight geopolymer concrete with eco-friendly material","authors":"S. Lakušić","doi":"10.14256/jce.2406.2018","DOIUrl":"https://doi.org/10.14256/jce.2406.2018","url":null,"abstract":"","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66966385","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 research presented in the paper shows that further investigations on additives used in the warm mix asphalt technology are needed. It was observed that the negative effect of adhesion loss in asphalt mixes produced by warm process can be reduced by adding ulexite mineral nano particles to a commercial additive. The Marshall stability, Indirect tensile strength modulus, and moisture susceptibility, were tested for this purpose. Based on the analysis of results, it can be seen that the WMA mixture production temperature can additionally be reduced, and that lower compaction energy is needed during placement of such mixtures, which results in energy savings.
{"title":"Investigation of nano ulexite mineral effects on mechanical behaviour of warm mix asphalt pavements","authors":"T.Kütük-Sert Kütük-Sert, Resul Ekrem Günbey","doi":"10.14256/jce.2568.2018","DOIUrl":"https://doi.org/10.14256/jce.2568.2018","url":null,"abstract":"The research presented in the paper shows that further investigations on additives used in the warm mix asphalt technology are needed. It was observed that the negative effect of adhesion loss in asphalt mixes produced by warm process can be reduced by adding ulexite mineral nano particles to a commercial additive. The Marshall stability, Indirect tensile strength modulus, and moisture susceptibility, were tested for this purpose. Based on the analysis of results, it can be seen that the WMA mixture production temperature can additionally be reduced, and that lower compaction energy is needed during placement of such mixtures, which results in energy savings.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66966609","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 influence of local geotechnical site conditions on the soil profile amplification is analysed in this paper by assuming that the incoming seismic waves consist of inclined P-SV waves. The inhomogeneous soil profile is idealized as a multi-layered saturated poroviscoelastic medium and characterized by the Biot’s theory with a shear modulus varying continuously in depth according to the Wichtmann’s model. The results are presented in terms of horizontal and vertical soil profile amplification with linear and nonlinear soil behaviour, for different values of incidence angle, pore-water saturation, porosity, permeability, coefficient of uniformity, and non-cohesive fines content.
{"title":"Influence of soil properties on amplification of saturated inhomogeneous poroviscoelastic soil profile","authors":"Toufiq Ouzandja, M. Hadid","doi":"10.14256/jce.2151.2017","DOIUrl":"https://doi.org/10.14256/jce.2151.2017","url":null,"abstract":"The influence of local geotechnical site conditions on the soil profile amplification is analysed in this paper by assuming that the incoming seismic waves consist of inclined P-SV waves. The inhomogeneous soil profile is idealized as a multi-layered saturated poroviscoelastic medium and characterized by the Biot’s theory with a shear modulus varying continuously in depth according to the Wichtmann’s model. The results are presented in terms of horizontal and vertical soil profile amplification with linear and nonlinear soil behaviour, for different values of incidence angle, pore-water saturation, porosity, permeability, coefficient of uniformity, and non-cohesive fines content.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66965496","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 objective of this paper is to present the most important factors that contribute to the quality and good life expectancy of road pavements. An overview of American and European research dealing with pavement maintenance issues, as related to the design, construction technology, material selection, and improvement of pavement properties, is provided in the paper. Some future trends relating to the extension of life-expectancy of pavements are also presented.
{"title":"Increasing life expectancy of road pavements","authors":"Z. Bencze","doi":"10.14256/jce.2644.2019","DOIUrl":"https://doi.org/10.14256/jce.2644.2019","url":null,"abstract":"The objective of this paper is to present the most important factors that contribute to the quality and good life expectancy of road pavements. An overview of American and European research dealing with pavement maintenance issues, as related to the design, construction technology, material selection, and improvement of pavement properties, is provided in the paper. Some future trends relating to the extension of life-expectancy of pavements are also presented.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66966782","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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