Civil and Environmental Engineering最新文献_第5页

Assessment of Slope Stability with the Assistance of Artificial Neural Network and Differential Evolution 基于人工神经网络和差分演化的边坡稳定性评价

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0026

V. T. Vu

引用次数: 0

Determination of Vibro - Compaction Parameters by Making a Test Board in a Port Site in Morocco 在摩洛哥港口场地制作振动压实试验板确定振动压实参数

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0029

Mohamed Bziaz, L. Bahi, L. Ouadif, A. Bahi, Abdehak Sabihi

{"title":"Determination of Vibro - Compaction Parameters by Making a Test Board in a Port Site in Morocco","authors":"Mohamed Bziaz, L. Bahi, L. Ouadif, A. Bahi, Abdehak Sabihi","doi":"10.2478/cee-2023-0029","DOIUrl":"https://doi.org/10.2478/cee-2023-0029","url":null,"abstract":"Abstract Vibro-compaction is a recent technique for treating soils in the mass, thus improving its mediocre geo mechanical properties. In addition, this treatment makes it possible to minimize the risk of liquefaction, it is closely linked to the grain size of the soil to be treated. The soil underlying the construction project of the port of Nador in Morocco requires treatment to improve its characteristics and in particular to minimize the risk of liquefaction, given that Morocco is in a collision zone, near the border between the two African-Eurasian plates that are seismically active (earthquake in the city of Al Hoceima in 2004 in Morocco). The purpose of this work is to test the different parameters of vibro-compaction (mesh, vibration frequency, height of passes, duration of compaction) necessary to obtain the objectives set for the work (relative density ≥ 77 %), through the carrying out of an embarkation test on the substitute sands of the main breakwater of this Port. The in situ control tests (CPT) of the main dam, which were carried out by the substitution sand, made it possible to confirm the results of the test bench. These results stipulate on the one hand that the vibro-compaction mesh of 4.00 m is the most optimal and on the other hand that the relative density is an important parameter of liquefaction control.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48896261","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

Retracted: Non-Linear Analysis of Hybrid Reinforced T- Beam with Partial Substitution Recycled Rubberized Concrete 收缩：部分替代再生橡胶混凝土的混合配筋T梁的非线性分析

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0009

Sulaiman Nayef Ahmed, Ahmad L. Almutairi, Wassim B. Domat

{"title":"Retracted: Non-Linear Analysis of Hybrid Reinforced T- Beam with Partial Substitution Recycled Rubberized Concrete","authors":"Sulaiman Nayef Ahmed, Ahmad L. Almutairi, Wassim B. Domat","doi":"10.2478/cee-2023-0009","DOIUrl":"https://doi.org/10.2478/cee-2023-0009","url":null,"abstract":"Abstract At present, the need to make use of industrial waste materials is increasing due to their harmful effects on the environment. In the present work, the behavior of hybrid reinforced T-Beam with partial substitution recycled rubberized concrete is studied. The finite element modeling by using ANSYS version 15 program. It contains also all the required steps needed to create the concrete models that were prepared to study the behavior of beams with partial substitution recycled rubberized concrete (RRC). The reinforcement of beams was various combinations of polymer GFRP and steel bars. The Rubberized concrete mixes were prepared by partial substitution 7.5 %, 10 %, and 12.5 % replacements by volume. The ratio of GFRP to steel reinforcement at mid‐span section was the second parameter investigated. Due to the large number of parameters affecting the behavior of Hybrid Reinforced T- Beam with partial substitution Recycled Rubberized Concrete, an extensive parametric study was performed using ANSYS version 15 program. Three parameters were investigated namely; Bottom RFT, compressive strength of concrete, and the existence of opening. The analytical results agree well with the experimental results in terms of mode of failure and the failure load values. The results indicated that although the flexural capacity of the tested specimen decreased with the addition of Crumb Rubber and reduced its self-weight. The failure load of the beam with partial substitution recycled rubberized concrete increases with bottom reinforcement by the GFRP bar or CFRP bar. Also, reinforced beams by CFRP bars had a higher failure load than reinforced beams by GFRP bars. Having an opening in hybrid reinforced T-Beam with partial substitution recycled rubberized concrete reduced the beam load capacity and maximum deflection. Also, using GFRP bars, and CFRP bars in the vicinity of openings in hybrid reinforced T-Beams increased the load capacity of these beams.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43351476","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

Parametric Study of Drilling Method Performed on One-Way Post-Tensioned Slabs 单向后张板钻孔方法的参数研究

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0015

J. Kraľovanec, M. Moravčík

{"title":"Parametric Study of Drilling Method Performed on One-Way Post-Tensioned Slabs","authors":"J. Kraľovanec, M. Moravčík","doi":"10.2478/cee-2023-0015","DOIUrl":"https://doi.org/10.2478/cee-2023-0015","url":null,"abstract":"Abstract Determination of the stress state in concrete structures is a very important, but difficult task. In the case of new structures, it is possible to easily instal measurement instruments which can provide important data as a part of real-time monitoring. However, the evaluation of stresses in existing structures is much more challenging. Currently, stress relief methods are a well-established approach for the evaluation of the actual state of existing structures. The so-called Drilling method (also known as Stress-relief coring technique) is one of the possible techniques for such analysis. For practical use of this method, knowledge of pivotal factors which influence stress relief is crucial. Therefore, this paper presents a parametric study performed on a one-way post-tensioned slab which can help to understand the effect of the depth of the core and the distance from the edge of the hole (position of strain gauges) on the change in stress in the vicinity of the drilled core. Finally, based on the obtained data, the recommendations for the subsequent experimental program will be summarized. According to the study, it seems that the depth of drilled core does not significantly influence the stress relief and the main impact can be attributed to distance from the edge of the hole.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47283595","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

Determination of the Hydrological and Morphometric Characteristics Using GIS 利用地理信息系统测定水文和地貌特征

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0004

Sahar I. M. Abd Elrahman, I. M. I. Ataalmanan

引用次数: 0

Developing Hydrostatic Beehive Brickwork 静压蜂窝砖的研制

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0020

Samir M. Chassib, Nasser Hakeem Tu’ma, Mohammed M. Handhal, Musab Sabah Abed, Sajid Kamil Zemam, Sa’ad Fahad Resan, Mustafa Jabar Madhi

{"title":"Developing Hydrostatic Beehive Brickwork","authors":"Samir M. Chassib, Nasser Hakeem Tu’ma, Mohammed M. Handhal, Musab Sabah Abed, Sajid Kamil Zemam, Sa’ad Fahad Resan, Mustafa Jabar Madhi","doi":"10.2478/cee-2023-0020","DOIUrl":"https://doi.org/10.2478/cee-2023-0020","url":null,"abstract":"Abstract In this paper, a new masonry construction is proposed based on honey beehive cell internal geometry as a unique structure and hydrostatic pressure principle. The considered experimental program involved suggestion, manufacturing, testing and analysis of masonry specimens of honey beehive units’ arrangement as well as corresponding specimens of custom arrangement, two classes of cementations bonding mortars are used. Plan strain concept and Saint Venant’s principle are adopted to model and assign proper boundary conditions of testing specimens. The significant improvement of masonry construction bearing capacity is confirmed by the obtained results and could be related to the presence of internal or self-confining pressure, which is produced due to the specific internal geometry of proposed honey beehive units’ arrangement of hexagonal construction units. The obtained results show that, the masonry specimens of proposed honey beehive arrangement Mode II exhibited higher bearing capacity in term of ultimate and service loads besides stiffness improvement in comparison with the customary arrangement Mode I.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49332781","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

An Investigation of Historic Structures of Nová Horka Castle in Studénka (CR) Studénka的NováHorka城堡历史结构调查（CR）

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0002

Lucie Augustinková

引用次数: 0

Effect of Fire on Reinforced Concrete Beams with FRP and Conventional Steel at Limited Time of Fire 火灾对有限火灾时间内FRP与常规钢结构钢筋混凝土梁的影响

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0006

Mohamed Atef Ghobashy, A. Hilal, M. Ibrahim

{"title":"Effect of Fire on Reinforced Concrete Beams with FRP and Conventional Steel at Limited Time of Fire","authors":"Mohamed Atef Ghobashy, A. Hilal, M. Ibrahim","doi":"10.2478/cee-2023-0006","DOIUrl":"https://doi.org/10.2478/cee-2023-0006","url":null,"abstract":"Abstract The aim of this study is to investigate the behavior of RC concrete beams reinforced with basalt, carbon, glass fiber reinforced polymer bars and conventional steel. A comparison between the results has been performed to investigate and study the effect of fire on reinforced concrete beams considering the following items: (flexural capacity, deflection behavior and crack pattern). It is noticeable that the use of FRP bars significantly increased the ultimate load of the specimens, where the percentage of increase ranged between 34 - 73 % of the ultimate load of the specimen C-S under static load. The greatest ultimate load was reached the beam that was reinforced with carbon bars (CFRP). It was also noticed able that the use of FRP rods significantly increases the deflection of the beams. The percentage of increase was between 45 - 170 % of the final deflection of the C-S specimen under static load. It was noted that the effect of the fire on the beams reinforced with fiber bars (FRP), where the efficiency of bearing capacity of beams after fire decreases by 11 to 18 % of the actual efficiency of bearing capacity of beams control. As for the beam reinforced with conventional steel bars, its efficiency was reduced by 15 % from the actual capacity.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41430641","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

Diagnostics of the Deformation Resistance of the Track Bed in the Inter -Station Section Palárikovo - Nové Zámky - Track No. 1 Palárikovo-NovéZámky-1号轨道站间区间道床变形阻力的诊断

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0025

L. Ižvolt, P. Dobeš, M. Mečár

{"title":"Diagnostics of the Deformation Resistance of the Track Bed in the Inter -Station Section Palárikovo - Nové Zámky - Track No. 1","authors":"L. Ižvolt, P. Dobeš, M. Mečár","doi":"10.2478/cee-2023-0025","DOIUrl":"https://doi.org/10.2478/cee-2023-0025","url":null,"abstract":"Abstract The fundamental pillars of the emerging European integrated railway area include improving the safety of rail transport and the quality parameters of railway lines and ensuring their interoperability. As rail transport is one of the safest transport systems and the most environmentally friendly, the Slovak Railways (ŽSR) have developed strategic and investment plans to increase the competitiveness of rail transport in relation to other modes of transport. The current modernisation or reconstruction in the territory of the Slovak Republic focuses on the main railway lines that are part of significant European corridors (AGC, AGTC, TEN-T corridors). The inter-station section Palárikovo - Nové Zámky, the subject of the article, is a part of the European corridor No. IV, connecting Dresden with Arad and leading through the territory of the Slovak Republic. In this context, the article presents the analysis of the values of deformation characteristics on the reconstructed inter-station section Palárikovo - Nové Zámky, obtained verifying the quality of the implemented individual structural layers of the track bed.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48863354","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

Behavior and Load Capacity of Concrete Slab Reinforced by CFRP Bar and Strengthening by CFRP Laminates 碳纤维布加固混凝土板的受力性能

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-05-12 DOI: 10.2478/cee-2023-0007

M. Medhlom, Entidhar Abed

{"title":"Behavior and Load Capacity of Concrete Slab Reinforced by CFRP Bar and Strengthening by CFRP Laminates","authors":"M. Medhlom, Entidhar Abed","doi":"10.2478/cee-2023-0007","DOIUrl":"https://doi.org/10.2478/cee-2023-0007","url":null,"abstract":"Abstract The most common FRP materials used are carbon fiber reinforced polymers (CFRPs), and glass fiber reinforced polymers (GFRPs). The use of CFRPs has grown rapidly in the construction industry, specifically in structural retrofitting, due to their strengthening property of CFRP. CFRPs are moreover high strength, lightweight, noncorrosive, and easy-to-install materials. In the present study, six reinforced concrete slab specimens included two control specimens reinforced by traditional steel reinforcements and the other reinforced by carbon fiber reinforced polymer CFRP bars without strengthening by laminated CFRP strips. The remaining four specimens are interiorly reinforced by CFRP bars and strengthened by CFRP laminates strips with different scheme layouts named Type 1 and Type 2. The specimens were tested under a uniformly distributed load applied at the top surface area of each specimen up to failure. The parameters considered in the present study are the amount of CFRP bars and CFRP laminates layout. Test results indicated that the strength carrying capacity and failure mode of tested specimens differ based on the steel reinforcement type and the presence of CFRP laminates layout.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48363967","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