Selected Scientific Papers Journal of Civil Engineering最新文献_第2页

Physical-mechanical Evaluation of Polyethylene Terephthalate Fiber Dune Sand Mortar Exposed to Elevated Temperature 高温下聚对苯二甲酸乙二醇酯纤维沙丘砂砂浆的物理力学性能评价

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0002

A. Ghrieb, Y. Abadou, T. Choungara, R. Bustamante

{"title":"Physical-mechanical Evaluation of Polyethylene Terephthalate Fiber Dune Sand Mortar Exposed to Elevated Temperature","authors":"A. Ghrieb, Y. Abadou, T. Choungara, R. Bustamante","doi":"10.2478/sspjce-2022-0002","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0002","url":null,"abstract":"Abstract The mechanical properties of mortar containing Polyethylene Terephthalate (PET) as Strapping Band Fibers (SBF) replacing natural sand have been studied by many researchers. These studies indicate that when SBF is used as a substitute for sand in mortar, the characteristics in both the fresh and hardened states are altered. This experiment’s purpose is to valorize local materials, which are abundant in the region of Djelfa (Algeria), in cement mortar manufacturing and to discuss the influence of these materials on the mechanical and physical characteristics of the resulting mortar at the room, and at the high temperature. This study presents the results of an experimental investigation into the effects of high temperatures on the properties of dune sand mortar made with strapping band fibers. The method for formulating the mortar mixes was based on the progressive replacement of dune sand by PET fibers, with weight contents of 0%, 0.5%, 1%, 1.5%, 2%, and 2.5%. Several tests have been carried out to study the evolution of the different characteristics of mortar mixtures. The workability, bulk density, compressive and tensile strengths, and all samples were subjected to temperatures of ambient, 100 °C, 200 °C, and 400 °C. The results demonstrate that the inclusion of the recycled fibers and the preservation mode had remarkable effects on the characteristics of the mortar obtained.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"7 1","pages":"1 - 14"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89201063","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

Coconut Oil as Bio-based PCM: Characteristics and Compatibility with Plastics 椰子油作为生物基PCM:特性及其与塑料的相容性

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0004

M. Ostrý, S. Bantová, V. Řezáčová

{"title":"Coconut Oil as Bio-based PCM: Characteristics and Compatibility with Plastics","authors":"M. Ostrý, S. Bantová, V. Řezáčová","doi":"10.2478/sspjce-2022-0004","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0004","url":null,"abstract":"Abstract The current use of buildings is facing an unprecedented increase in energy costs, especially in the European Union. The energy costs can be reduced by energy savings and by increased use of renewable energy represented mostly by energy converted from solar radiation. When solar energy is considered to be utilized in buildings, the mismatch between energy availability and energy demand must be solved by energy storage. This paper describes the principles of the use of latent heat thermal energy storage and the possibility of using bio-based phase change materials as heat storage media. Because the latent heat storage media undergo a change of phase during the charging and discharging, proper encapsulation is necessary. The paper presents the main findings of a study focused on the compatibility between coconut oil and selected plastics as materials of encapsulation. The compatibility of selected plastics and Coconut oil was evaluated by laboratory experiment based on the immersion of plastic samples in coconut oil and calculation of change in weight of samples within 17 weeks lasting test. The negligible weight changes were occurred for polycarbonate and polyethylene terephthalate which proves excellent compatibility with Coconut oil.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"47 1","pages":"1 - 8"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90666981","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

Deformation Properties of Stone Columns Back-calculated from Static Load Tests 静载试验反算石柱变形特性

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0017

Houman Soleimani Fard

{"title":"Deformation Properties of Stone Columns Back-calculated from Static Load Tests","authors":"Houman Soleimani Fard","doi":"10.2478/sspjce-2022-0017","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0017","url":null,"abstract":"Abstract The stone column is a cost-effective, sustainable, and technically sound ground improvement solution for enhancing bearing capacity, minimizing settlement, and mitigating the liquefaction potential of a wide range of soils. In this study, the main methods of stone column execution are briefly explained, design approaches are discussed, and testing procedures are elaborated on in more detail. The results of plate load tests (PLT) are numerically simulated to back-calculate stone column properties. In this research, the Hardening Soil model (HS) is selected to simulate stone columns and soil profiles. The outcomes of this modelling and the adopted calculation approach are verified by three-zone load tests (ZLT) performed on grounds reinforced by stone columns in various projects. Reasonably good matches are observed between experimental and numerical results, approving parameters back-analyzed from PLTs and the employed calculation methodology. Finally, a widely used analytical approach of the calculation of stone columns (Priebe method) is compared with the numerical and experimental results of the studied ZLTs. The comparison confirmed that the Priebe method could practically calculate the settlement of grounds treated by stone columns although settlements were slightly higher than experimentally observed values. In the end, the advantages and limitations of each method are discussed.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"73 1","pages":"1 - 26"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84329714","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

Mechanical Properties of Self-compacting Concrete Containing Fine Aggregates from Cement Kiln Dust and Hardened Cement Waste 含水泥窑灰细骨料和水泥硬化废弃物自密实混凝土的力学性能

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0012

Leila Kherraf, Karim Younes, Assia Abdelouahed, M. Belachia, H. Hebhoub

引用次数: 0

Identification of Soil Mechanical Parameters by Inverse Analysis Using Stochastic Methods 基于随机逆分析方法的土壤力学参数识别

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0018

Moussaoui Moufida, Rehab Bekkouche Souhila, Kamouche Houda, Benayoun Fadila, Goudjil Kamel

{"title":"Identification of Soil Mechanical Parameters by Inverse Analysis Using Stochastic Methods","authors":"Moussaoui Moufida, Rehab Bekkouche Souhila, Kamouche Houda, Benayoun Fadila, Goudjil Kamel","doi":"10.2478/sspjce-2022-0018","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0018","url":null,"abstract":"Abstract The mechanical parameters of the soil that must be introduced into geotechnical calculations, in particular those carried out by the Finite Element Method, are often poorly understood. The search for the numerical values of these parameters so that the models best reflect the observed reality constitutes the inverse analysis approach. In this article, we are interested in the identification of the mechanical parameters of the soil based on the principle of inverse analysis using the two methods of stochastic optimization, the genetic algorithm and the hybrid genetic algorithm with Tabu search. Soil behavior is represented by the constitutive soil Mohr-Coulomb model. The identification relates to the following two parameters: The shear modulus (G) and the friction angle (φ). The validation of these two stochastic optimization methods is done on the experimental sheet pile wall of Hochstetten in Germany. The results obtained by applying the genetic algorithm method and the hybrid genetic algorithm method for the identification of the two Mohr-Coulomb parameters (G, φ) show that the hybridization process of the genetic algorithm combined with the Tabu search method accelerated the convergence of the algorithm to the exact solution of the problem whereas the genetic algorithm alone takes a much longer computation time to reach the exact solution of the problem.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"314 1","pages":"1 - 12"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80062008","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 Measurements of Drag and Lift Coefficient on Building with an Elliptical Cross-section 椭圆截面建筑物阻力和升力系数的实验测量

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0013

M. Franek, M. Macák, O. Hubová

引用次数: 1

Durability of Different UHPFRCs, Made from Pozzolan as a Substitute for Portland Cement and Immersed in Two Aggressive Environments of Hydrochloric and Sulfuric Acids 不同UHPFRCs在盐酸和硫酸两种侵蚀环境下的耐久性研究

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0005

F. A. Medjber, M. Saidi, B. Safi

引用次数: 0

On the Practical Use of Advanced Constitutive Laws in Finite Element Underground Structures Analysis 先进本构法在地下结构有限元分析中的实际应用

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0015

A. Moussa, M. Salah, Laouar Mohamed Salah

引用次数: 0

Optimization of the Combined Effect of Lime and Ground Granulated Blast-furnace Slag on Clayey Soil 石灰与粉状高炉渣复合处理粘性土效果的优化研究

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0007

Diaf Nasreddine, Hidjeb Mustapha, Boudjellal Khaled, Boudiaf Mohamed, Lamri Ihcene

引用次数: 0

Seismic Response of Concrete Gravity Dams Considering Hydrodynamic Effects 考虑水动力效应的混凝土重力坝地震响应

Selected Scientific Papers Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sspjce-2022-0011

Aouadj Linda, A. Kadid

{"title":"Seismic Response of Concrete Gravity Dams Considering Hydrodynamic Effects","authors":"Aouadj Linda, A. Kadid","doi":"10.2478/sspjce-2022-0011","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0011","url":null,"abstract":"Abstract This paper presents a dynamic analytical study to assess the effect of dam height as well as fluid compressibility on the gravity response of a concrete dam, considering the effects of hydrodynamic interaction. The analysis is carried out using the ADINA Finite Element software for empty and full reservoir conditions by considering several models. In the first model, the mass of fluid is taken into account by the concept of Westergaard added mass, in the second model; an acoustic fluid element is used to simulate the effect of water on the reservoir. The height of the dam is one of the main factors affecting the seismic response of gravity dams; because the change in height provides different responses depending on the natural periods, displacements and stresses obtained from static and dynamic analyses. The numerical results showed that the effect of interaction between the dam and the reservoir plays an important role in the precise estimation of the dynamic response of gravity dams. The hydrodynamic water pressure from the reservoir increases stresses in the dam body and horizontal displacements at the crest. The seismic response obtained by the incompressible water model (Westergaard) is compared with that of the compressible water model.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"27 1","pages":"1 - 14"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83159843","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