Journal of Building Materials and Structures最新文献_第5页

Valorization of calcined kaolinitic clay used in high performance mortar 高性能砂浆中煅烧高岭石粘土的增值研究

Journal of Building Materials and Structures Pub Date : 2020-04-03 DOI: 10.5281/ZENODO.3735759

S. Mansour, Y. Ghernouti, R. Chaid

引用次数: 1

Comparative design procedures of stone columns for liquefaction stabilization 液化稳定石柱的比较设计方法

Journal of Building Materials and Structures Pub Date : 2020-04-01 DOI: 10.5281/ZENODO.3733397

T. Messafer, Mohamed Oussama Hassak, A. Abzar

引用次数: 0

Design and Construction Criteria of Twin Tunnel: Taking an Adverse Wind Condition Effects on Air Pollution Short Circuit at Tunnel Portals as a case 双隧道设计与施工准则——以不利风况对隧道入口空气污染短路的影响为例

Journal of Building Materials and Structures Pub Date : 2020-03-30 DOI: 10.5281/ZENODO.3732515

H. Miloua

{"title":"Design and Construction Criteria of Twin Tunnel: Taking an Adverse Wind Condition Effects on Air Pollution Short Circuit at Tunnel Portals as a case","authors":"H. Miloua","doi":"10.5281/ZENODO.3732515","DOIUrl":"https://doi.org/10.5281/ZENODO.3732515","url":null,"abstract":"This paper aims to study the influence of the tunnel portal designs, wind conditions and ventilation rate on the amount of air pollution short circuit from one tunnel tube to the other. These effects are investigated by Computational Fluid Dynamics (CFD) code used a Large Eddy Simulation (LES) method to control air quality inside the tunnel and reduced as far as possible a short circuited (flow Recirculation) flow level. A validation of CFD code to experimental data in 1:100 scale model of the road traffic tunnel tested in wind-tunnel showed that the CFD gave satisfactory prediction of the air pollution short circuit in the vicinity of tunnel portal. The predicted concentration of the gas tracer (CO2) used as the safety criterion provide the useful information about a short circuit amount resulted for each structural variant of tunnel portals, such as a central dividing wall built as extensions from the end of road tunnel and offset tunnel portal entrance exit tested under different speed ratio of wind and ventilation. A detailed look at results is beyond the scope of analysis to determine optimal air pollution short circuit percentages. Finally, the perfect tunnel portals geometry can be suggested.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47025445","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

Effect of Street Morphology on Buildings’ Thermal Storage in a Hot and Arid Climate: Case Study of Biskra (Algeria) 炎热干旱气候下街道形态对建筑蓄热的影响——以阿尔及利亚比斯克拉为例

Journal of Building Materials and Structures Pub Date : 2019-10-11 DOI: 10.5281/ZENODO.3480097

K. Benamor, M. Benabbas

{"title":"Effect of Street Morphology on Buildings’ Thermal Storage in a Hot and Arid Climate: Case Study of Biskra (Algeria)","authors":"K. Benamor, M. Benabbas","doi":"10.5281/ZENODO.3480097","DOIUrl":"https://doi.org/10.5281/ZENODO.3480097","url":null,"abstract":"This work is an experimental study focusing on the relationship between street morphology and thermal storage in buildings. The first aim of this study is to reduce air conditioning usage in hot and arid areas, taking as example Biskra city (Algeria), during the long summer period (5 months), by reducing thermal storage. This leads to the reduction of carbon emissions to a level higher than the individual construction level in order to design a sustainable city, using measuring instruments (kimo HD 100 and Cason CA 380), we measured outdoor air temperature, wall temperature, relative humidity and wind speed on three street morphologies ; the (canyon, dihedral and open streets). These streets are different in terms of morphological indicators such as Sky View Factor (SVF) and albedo materials (a). We also applied mathematical equations across the thermal balance to calculate thermal storage. Our second goal was to identify the morphological indicators of the streets affecting the thermal storage of buildings. In this context, the obtained results showed that SVF was the most influential parameter on the heat storage.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41784821","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

Predicting Shear Strength of RC Columns Using Artificial Neural Networks 基于人工神经网络的钢筋混凝土柱抗剪强度预测

Journal of Building Materials and Structures Pub Date : 2019-07-26 DOI: 10.5281/ZENODO.3352303

A. Said, N. Gordon

{"title":"Predicting Shear Strength of RC Columns Using Artificial Neural Networks","authors":"A. Said, N. Gordon","doi":"10.5281/ZENODO.3352303","DOIUrl":"https://doi.org/10.5281/ZENODO.3352303","url":null,"abstract":"A primary objective in the seismic design of structures is to ensure that the capacity of individual members of a structure exceeds the associated demands. For reinforced concrete (RC) columns, several parameters involving steel and concrete material properties control behavior and strength. Furthermore, it is unrealistic to simply consider the shear strength calculation as the sum of concrete and steel contributions while accounting for axial force when, in fact, all those parameters are interacting. Consequently, it is challenging to reasonably estimate the shear capacity of a column while accounting for all the factors. This study investigates the viability of using artificial neural networks (ANN) to estimate the shear capacity of RC columns. Results from ANN are compared with both experimental values and calculated values, using semi-empirical and empirical formulas from the literature. Results show that ANNs are significantly accurate in predicting shear strength when trained with accurate experimental results, and meet or exceed the performance of existing empirical formulas. Accordingly, ANNs could be used in the future for analytical predictions of shear strength of RC members.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43579567","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

Effect of Thickness Stretching on the Natural Frequencies of Laminate-Faced Sandwich Plates Using a New Layerwise Model 用一种新的分层模型研究厚度拉伸对夹层板固有频率的影响

Journal of Building Materials and Structures Pub Date : 2019-07-26 DOI: 10.5281/ZENODO.3352310

M. Belarbi, A. Tati, A. Khechai

引用次数: 3

Finite Element Modeling of Strengthened Beams Using CFRP CFRP加固梁的有限元建模

Journal of Building Materials and Structures Pub Date : 2019-07-26 DOI: 10.5281/ZENODO.3352308

S. Barour, A. Zergua

引用次数: 2

Corrosion Behavior of Reinforcing Steel in Concrete Elements in Alkaline Medium 碱性介质中钢筋在混凝土构件中的腐蚀行为

Journal of Building Materials and Structures Pub Date : 2019-07-26 DOI: 10.5281/ZENODO.3352287

N. Bourenane, N. Sedira, Y. Hamlaoui

{"title":"Corrosion Behavior of Reinforcing Steel in Concrete Elements in Alkaline Medium","authors":"N. Bourenane, N. Sedira, Y. Hamlaoui","doi":"10.5281/ZENODO.3352287","DOIUrl":"https://doi.org/10.5281/ZENODO.3352287","url":null,"abstract":"Corrosion of steel in reinforcement concrete is complex. When chloride ions and oxygen reach reinforcing steel, corrosion is initiated. The deterioration process starts with expansions of the bare steel substrate then after cracks in the concrete are developed. The aim of this work is to determine firstly, through the electrochemical technic, the critical concentration of chloride ions which are responsible for the initiation of the dissolution step. Then, the effect of the external parameters on the rate of penetration of the chloride ions into the concrete are also evaluated. For this propose, the electrochemical behavior of the steel of construction “E24” is studied in carbonate medium without and with different concentrations of chloride ions. The effect of various parameters such as temperature, ions concentration and solution pH was also evaluated through the evolution of the open circuit potential, d.c polarization measurement and electrochemical impedance spectroscopy. The d.c polarization and EIS results shows that the addition of 0.5M CaCl2 (as critical concentration) to the saturated Ca(OH)2 solution, brings to a rapid and a continuous dissolution of the substrate where after 3 hours of immersion time the whole surface of the substrate was covered the corrosion products. This is may be due to specific adsorption of Cl-.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41846370","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

Microstructural Studies of Materials DD1 and KT2 By X-Ray Diffraction DD1和KT2材料的X射线衍射微观结构研究

Journal of Building Materials and Structures Pub Date : 2019-03-29 DOI: 10.5281/ZENODO.2606600

A. Lakel

{"title":"Microstructural Studies of Materials DD1 and KT2 By X-Ray Diffraction","authors":"A. Lakel","doi":"10.5281/ZENODO.2606600","DOIUrl":"https://doi.org/10.5281/ZENODO.2606600","url":null,"abstract":"In this work, we have studied two Kaolin .kaolin DD1 which consists of two main phases (kaolinite and Halloysite) and Tamazert kaolin .kaolin KT2 whose main constituents are kaolinite, quartz and mica. Our choice was set on the component that is Kaolinite because of the existence of the latter in both kaolins. A correction of Lorentz-Polarization was carried out prior to the diffraction data, which has been achieved using LWL program dome. The true profile was extracted by this program. The methods used for the micro structural analysis of the present in the two Kaolins are the Warren - Averbach and the Williamson – Hall methods Scherrer's relationship has been applied in cases where the compound is devoid of strains. \u0000The study revealed that the kaolin Kaolinite DD1 is devoid of micro constraints. Which similar analysis has shown that the Kaolinite in KT2 incorporates the strains. This was confirmed by the Williamson - Hall method as well as Fourier analysis. The evaluation of strains in the Kaolinite of KT2 has been dome the method of Warren - Averbach and Williamson – Hall diagram. The average value of this constraint found by the first method us 0.15 and 0.21 by the second method gave. The average size of crystallites of the Kaolinite in DD1 was found between 29 A and 230 A. \u0000by the method of Warren - Averbach and about 118 A by the method of Williamson - Hall. Range the second Kaolinite the Kaolinite KT2, the size obtained was respectively 98 A and 130 A using to by methods. The study of the size distribution showed that the dominant size of Kaolinite in DD1 and KT2 is about 40 A (42%) and 58 A (32%). respectively.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43611997","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

Effect of Natural Pozzolan and Calcined Paper Sludge as Pozzolanic Additions on the Physicals and Mechanicals Properties of Heat Treated Self-Compacting Mortars 天然火山灰和煅烧纸泥作为火山灰添加剂对热处理自密实砂浆物理力学性能的影响

Journal of Building Materials and Structures Pub Date : 2019-03-29 DOI: 10.5281/ZENODO.2611079

Y. Ghernouti, B. Safi, B. Rabehi

引用次数: 0