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Analysis of static and dynamic deformation modulus 静、动变形模量分析
Engineering Structures and Technologies Pub Date : 2016-07-07 DOI: 10.3846/2029882X.2016.1201434
Mindaugas Mikolainis, Marijus Ustinovičius, D. Sližytė, T. Zhilkina
{"title":"Analysis of static and dynamic deformation modulus","authors":"Mindaugas Mikolainis, Marijus Ustinovičius, D. Sližytė, T. Zhilkina","doi":"10.3846/2029882X.2016.1201434","DOIUrl":"https://doi.org/10.3846/2029882X.2016.1201434","url":null,"abstract":"AbstractThis article summarises dynamic deformation modulus correlation with second reload of static plate load test results for an even thickness soil strata layer. An analysis of execution and result interpretation of both static deformation modulus and dynamic deformation modulus is provided also. Different correlations between the two modulus according to different authors are provided. Since dynamic plate load test is not regulated in Lithuania as a soil compaction contron method, a few dynamic plate load tests and static plate load tests were executed in order to compare compaction results. The additional experiments for dynamic plate load tests in different depths were executed which showed that deformation modulus is dependant on depth of test execution, thus it is worthwile to mention to be cautious on compaction results in trenches.","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2016.1201434","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69989786","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}
引用次数: 5
Supporting of repairs processes of concrete industrial floors 混凝土工业地坪维修过程的支持
Engineering Structures and Technologies Pub Date : 2016-04-17 DOI: 10.3846/2029882X.2016.1171954
M. Gajzler
{"title":"Supporting of repairs processes of concrete industrial floors","authors":"M. Gajzler","doi":"10.3846/2029882X.2016.1171954","DOIUrl":"https://doi.org/10.3846/2029882X.2016.1171954","url":null,"abstract":"AbstractIn the large-scale facilities, including on-site storage or shopping malls, floor plays an important role. It has to meet special requirements regarding mechanical properties, aesthetics and durability. Despite much effort, both in the design and execution phase, cases of damage of the floor happens, causing some specific consequences – often associated with restrictions on use. In such a situation it is required to perform rapid diagnosis and effective repair. One possibility foster this process is the use of advisory system which operates in terms of material and technological solutions. The article points out the limitations resulting from the use of advisory system related to situations of individual and unique damage. In the case of such damage it is necessary to implement research procedures and the use of advisory system turns out to be ineffective.","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69990118","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}
引用次数: 5
Development and investigation of thermal insulation from hemp-polylactide fibres 大麻-聚乳酸纤维绝热材料的开发与研究
Engineering Structures and Technologies Pub Date : 2016-04-17 DOI: 10.3846/2029882X.2016.1158127
Rūta Stapulionienė, R. Tupciauskas, S. Vaitkus, Sigitas Vėjelis
{"title":"Development and investigation of thermal insulation from hemp-polylactide fibres","authors":"Rūta Stapulionienė, R. Tupciauskas, S. Vaitkus, Sigitas Vėjelis","doi":"10.3846/2029882X.2016.1158127","DOIUrl":"https://doi.org/10.3846/2029882X.2016.1158127","url":null,"abstract":"AbstractIn the last two decades intensive grow of industry of building materials from renewable resources is observed. Such situation is related to some aspects: global warming, environmental pollution, impact on human health, environmental impact of materials at their end-of-life.In current study development of thermal insulation materials from hemp and polylactide fibres are analysed. While main parameter for thermal insulation materials is thermal conductivity, rational density of composite 40 kg/m3 was chosen. For experiments 11 compositions were prepared. One composition was prepared just with hemp and polylactide fibres, five compositions with different amount of hydrophobic agent and 5 compositions with different amount of fire retardant. Experimentally thermal conductivity, sound absorption coefficient, short-term water absorption, fire resistance, water vapour transfer properties and compressive strength were determined. Rational amount of hydrophobic agent and fire retardants was chosen.","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2016.1158127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69990039","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}
引用次数: 5
The effect of expanded glass and polystyrene waste on the properties of lightweight aggregate concrete 膨胀玻璃和聚苯乙烯废料对轻骨料混凝土性能的影响
Engineering Structures and Technologies Pub Date : 2016-04-17 DOI: 10.3846/2029882X.2016.1162671
J. Šeputytė-Jucikė, M. Sinica
{"title":"The effect of expanded glass and polystyrene waste on the properties of lightweight aggregate concrete","authors":"J. Šeputytė-Jucikė, M. Sinica","doi":"10.3846/2029882X.2016.1162671","DOIUrl":"https://doi.org/10.3846/2029882X.2016.1162671","url":null,"abstract":"AbstractThe main objective of this study is to create a lightweight aggregate concrete (LWAC) with a low thermal conductivity coefficient using expanded glass (EG) aggregate, produced from waste glass or crushed expanded polystyrene waste, obtained by crushing waste packing tare of household appliances. Research related to the effects of the amount of Portland cement (PC) as well as EG aggregates and crushed expanded polystyrene waste on physical (density, thermal conductivity coefficient, water absorption and capillary coefficient) and mechanical (compressive strength) properties of LWAC samples are provided.Insulating LWAC based on a small amount of PC and lightweight EG aggregates and crushed expanded polystyrene waste, with especially low thermal conductivity coefficient values (from 0.070 to 0.098 W/ (m·K)) has been developed. A strong relationship between thermal conductivity coefficient and density of LWAC samples was obtained. The density of LWAC samples depending on the amount of PC ranged betwee...","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2016.1162671","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69990052","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}
引用次数: 20
An investigation about effects of fluid-structure-soil interaction on response modification coefficient of elevated concrete tanks 流固土相互作用对高架混凝土储罐响应修正系数的影响研究
Engineering Structures and Technologies Pub Date : 2016-04-17 DOI: 10.3846/2029882X.2016.1157766
M. Hashemi, K. Bargi
{"title":"An investigation about effects of fluid-structure-soil interaction on response modification coefficient of elevated concrete tanks","authors":"M. Hashemi, K. Bargi","doi":"10.3846/2029882X.2016.1157766","DOIUrl":"https://doi.org/10.3846/2029882X.2016.1157766","url":null,"abstract":"AbstractThis paper aims to observe effects of fluid-structure-soil interactions on the response modification coefficient of elevated concrete tanks with frame and shaft supporting systems. Because of weaknesses and failures of elevated tanks that have been reported in recent earthquakes and importance of optimum and resistant design and also better seismic performance of these structures, it is essential to investigate on the response modification coefficient of elevated concrete tanks. In this paper, the response modification coefficient has been evaluated by using the numerical modeling. The method of research is a case study. The models have been subjected to an ensemble of important earthquake ground motions. The effects of soilstructure interactions and fluid-structure interactions on seismic behavior of the elevated concrete tanks have been modeled by the equivalent springs and Housner’s method, respectively. Dynamic response of the elevated tanks has been considered by using the nonlinear time hist...","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2016.1157766","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69989983","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}
引用次数: 0
Supporting building administrator’s decisions in determining maintenance costs of residential buildings 协助楼宇管理人员决定住宅楼宇的维修费用
Engineering Structures and Technologies Pub Date : 2016-04-17 DOI: 10.3846/2029882X.2016.1170641
R. Bucoń, M. Tomczak
{"title":"Supporting building administrator’s decisions in determining maintenance costs of residential buildings","authors":"R. Bucoń, M. Tomczak","doi":"10.3846/2029882X.2016.1170641","DOIUrl":"https://doi.org/10.3846/2029882X.2016.1170641","url":null,"abstract":"AbstractMaintenance of multi-family buildings is a difficult and complex task, which requires a proper (multi-criteria) assessment of a building’s condition as well as determining and planning maintenance costs. It requires from a building administrator to be well experienced and have skills in making decisions, which include a proper investment of limited funds allocated for maintenance. This task is usually preceded by the analysis of cost-effectiveness and validity to perform certain repairs. Taking into account the above the authors proposed a model supporting an administrator in making decisions while determining a scope of building renovation. The system algorithm proposed comprises a few stages including: building condition and its proposed repair evaluation and the choice of renovation variant. It is based on tools such as multicriteria methods to support decisions and linear programming. Calculations conducted using the suggested model allow an administrator to obtain key information for appropri...","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2016.1170641","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69990102","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}
引用次数: 3
Possible defects in wood, wood parameters variability and some of its influence on quality of building structure 木材可能存在的缺陷、木材参数的可变性及其对建筑结构质量的一些影响
Engineering Structures and Technologies Pub Date : 2015-12-18 DOI: 10.3846/2029882X.2016.1123895
J. Malesza
{"title":"Possible defects in wood, wood parameters variability and some of its influence on quality of building structure","authors":"J. Malesza","doi":"10.3846/2029882X.2016.1123895","DOIUrl":"https://doi.org/10.3846/2029882X.2016.1123895","url":null,"abstract":"AbstractPaper specifies the wood-framed with sheathing construction including phases of realization and exploitation. Methods of investigation based on practice and theory has been employed where practical identification of processes and their phases were presented with theoretical description of structure deformation within the exploitation period. Obtained results of investigations are presented in the form of technologic and mechanic of structure diagrams for buildings with adequate algorithms of analysis. Paper presents practical systematic of construction stages, technological problems and hazards in respect of loading and construction technology with method of computation of vertical deformations of building. Paper presents evaluation of contribution of wood defects in response to loading in the wood-framed residential building in exploitation process. Location of knots, allocation of pith in the elements cross section, defects of slope of grain and influence of moisture decreasing is examined in th...","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2016.1123895","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69989761","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}
引用次数: 0
Thin layer concrete blockwork in compression: an experimental analysis 薄层混凝土砌块受压试验分析
Engineering Structures and Technologies Pub Date : 2015-12-18 DOI: 10.3846/2029882X.2015.1115377
A. Trad, H. Ghanem, Nivine Abbas, Z. Hamdan
{"title":"Thin layer concrete blockwork in compression: an experimental analysis","authors":"A. Trad, H. Ghanem, Nivine Abbas, Z. Hamdan","doi":"10.3846/2029882X.2015.1115377","DOIUrl":"https://doi.org/10.3846/2029882X.2015.1115377","url":null,"abstract":"AbstractThe compressive strength of concrete block masonry is dependent upon the unit compressive strength, the type of unit, the mortar and the form of masonry construction (Mirza et al. 1995). The design codes allow masonry compressive strength to be established (or better: estimated) by calculation, from tests, or from tabulated values. In this way the current European masonry standard EN 1996: Part 1-1 (LST EN 1996-1-1) tabulates the masonry strength for concrete blocks with thin layers of mortar. In France, doubts exist on the validity of these tabulated values for the blocks made with lightweight aggregates. To provide data for an extension of the use of the tabulated values for lightweight aggregates blocks and at the same time to provide input to the development of Eurocode 6, a major research program was set up. The research program aims to evaluate the mechanical strength of the thin joints hollow concrete masonry made with dense or lightweight aggregates. Tests have been carried out on a very l...","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2015.1115377","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69989619","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}
引用次数: 1
Experimental investigation of steel equal angle subjected to compression 钢等角受压试验研究
Engineering Structures and Technologies Pub Date : 2015-12-18 DOI: 10.3846/2029882X.2015.1113892
Jyoti V. Bhilawe, L. Gupta
{"title":"Experimental investigation of steel equal angle subjected to compression","authors":"Jyoti V. Bhilawe, L. Gupta","doi":"10.3846/2029882X.2015.1113892","DOIUrl":"https://doi.org/10.3846/2029882X.2015.1113892","url":null,"abstract":"AbstractThis paper presents pin-ended compression tests on steel equal angles. Three nominal section sizes were tested. Detailed measurements of material properties, residual stresses, and geometrical imperfections were conducted. The pin ended specimens were tested with a minimal eccentricity of L/1,000 applied about the minor axis to cause compression at the tips of the legs. The test data are compared with the Indian specifications for hot-rolled steel structures. The section capacities obtained from the column tests are found to be between 15 and 40% higher than those calculated according to the specifications. It is concluded that there is no need to include the additional eccentricity specified in the steel structures standards accounting for the shift of the effective centroid, and that the eccentricity of L/1,000, specified for all section classes, should be applied to slender sections only.","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2015.1113892","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69989549","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}
引用次数: 4
SELECTING THE BEST ARCHITECTURAL FORM OF THE OFFICE BUILDING WITH THE LEVEL OF NON-STOP FUNCTION AGAINST EXPLOSION 选择办公楼的最佳建筑形式，具有不间断防爆功能的水平
Engineering Structures and Technologies Pub Date : 2015-12-18 DOI: 10.3846/2029882X.2015.1120690
J. Nakhaei, Mahdi Bitrafan, Shahin Lale Arefi, H. Samee
{"title":"SELECTING THE BEST ARCHITECTURAL FORM OF THE OFFICE BUILDING WITH THE LEVEL OF NON-STOP FUNCTION AGAINST EXPLOSION","authors":"J. Nakhaei, Mahdi Bitrafan, Shahin Lale Arefi, H. Samee","doi":"10.3846/2029882X.2015.1120690","DOIUrl":"https://doi.org/10.3846/2029882X.2015.1120690","url":null,"abstract":"AbstractRegarding the importance of structures in sustainable development of countries, the necessity to consider them versus inflicted forces has an especial position. One of the inflicted forces upon these structures is explosion. Given that the resistance of a construction against blast wave depends on the form and shape of the building, numbers of trap doors and openings, power and quality of materials utilized in the building; in consequence, studying and evaluating types of construction forms versus outcomes resulted from explosion find importance. The behavior of three kinds of buildings including the forms of cone, hemisphere and frustum were, therefore, evaluated in the research. Various methods can be applied in order to assess behavior of construction against blast load, however, Finite Element method has been utilized in the article duo to particular capabilities of it in the blast assessments. Then, results of blast loading over the constructions were surveyed and it was concluded that buildi...","PeriodicalId":11839,"journal":{"name":"Engineering Structures and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3846/2029882X.2015.1120690","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69989639","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}
引用次数: 0
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