Civil and Environmental Engineering最新文献_第2页

Investigation of the Most Positions Affected in Rail Track When the Modulus of Elasticity of the Ballast Layer is Changed 改变道碴层弹性模量时铁轨受影响最大位置的研究

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0051

Zaman Alani, Adnan Q. Mohammed, Maysloon Zaidan

{"title":"Investigation of the Most Positions Affected in Rail Track When the Modulus of Elasticity of the Ballast Layer is Changed","authors":"Zaman Alani, Adnan Q. Mohammed, Maysloon Zaidan","doi":"10.2478/cee-2023-0051","DOIUrl":"https://doi.org/10.2478/cee-2023-0051","url":null,"abstract":"Abstract The railway is one of the cheapest methods to transport people and heavy goods. It is safer than highways. In Iraq, many railways connect the south country with the middle and north, which are old, damaged, and need to continued maintenance. Iraq needs to construct new lines of the rail track with low-cost, less maintenance, and highly stable structure, which requires understanding the behavior of rail track under train loads and the pattern of distribution of deformations, stresses, and strains inside the body of rail track and know the layer which more effected by changing the strength of ballast layer by change modulus of elasticity of it. This paper investigates the influence of modulus of elasticity of the ballast layer on the behavior of railways and the positions of deformation, stresses, and strains in the rail track which is most affected by the change in the modulus of elasticity and the value of the effect. The finite element approach was considered in this study using Abaqus Ver. 6.14-4 program. The investigation outcomes displayed that when the ballast layer’s modulus of elasticity E increase by 100 MPa, the value of deformation in the rail track is affected in all layers, and the value of decreased is 6.8 % for rail, 6.9 % for ballast, and 6.7 % for the sub-ballast layer. Therefore the strain of the sub-ballast layer is affected by the change modulus of elasticity of the ballast layer more than other ballast and subgrade. Also, the result shows that stresses in the rail are the only part of the rail track affected by the change in the ballast layer’s modulus of elasticity E, while the other layers are unaffected. So the increase in E of the ballast layer affects the layer beneath it, which is the sub-ballast layer.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139019735","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

Effect of Initial Water Content on the Collapsibility of Natural and Cement-Treated Gypseous Soils 初始含水量对天然土和水泥处理过的粘性土塌陷性的影响

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0055

M. Jassam, A. Abd, M. A. Hussein

引用次数: 0

Investigation of the Flexural Behavior of Bacterial Concrete Beams 细菌混凝土梁的抗弯行为研究

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0043

Mohammed T. Hind, Ahmed S. Ali

{"title":"Investigation of the Flexural Behavior of Bacterial Concrete Beams","authors":"Mohammed T. Hind, Ahmed S. Ali","doi":"10.2478/cee-2023-0043","DOIUrl":"https://doi.org/10.2478/cee-2023-0043","url":null,"abstract":"Abstract Bacterial self-healing concrete is an eco-friendly and superior treatment technique that has efficient bonding capacity and compatibility with concrete compositions. It is capable of filling deep microcracks and healing the crack autonomously by calcium carbonate precipitating phenomenon which results in sustainable construction materials. The purpose of this research is to investigate the use of microorganisms Bacillus Subtilis to improve the mechanical properties and the efficiency of self-healing of reinforced concrete beams for two types of concrete, reactive powder concrete (RPC), and lightweight self-compacting concrete (LWASCC), by two methods of addition (direct addition, and encapsulation). The experimental program consists of casting six simply supported beams tested under monotonic and repeated loading. Incorporate bacteria and the precursor (calcium lactate) in concrete mixtures show an improvement in compressive strength, splitting, and flexural strength by up to 21.74 %, 10.92 %, 21.21 % by encapsulation method, and 17.7 %, 18.0 %, 20.84 % by direct addition. In addition, there is an enhancement in the first crack load and ultimate load. Microscopical image demonstrated that calcium carbonates had been deposited in the crack up to 1.0 mm width by bacterial activity within 32 days.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139019185","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

Used Isolation System to Reduce the Response of Offshore Structure Considering Soil Structure Interaction 考虑到土壤结构相互作用，使用隔离系统降低近海结构的响应

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0060

A. Hasan, Yahya Mohammad Younus

{"title":"Used Isolation System to Reduce the Response of Offshore Structure Considering Soil Structure Interaction","authors":"A. Hasan, Yahya Mohammad Younus","doi":"10.2478/cee-2023-0060","DOIUrl":"https://doi.org/10.2478/cee-2023-0060","url":null,"abstract":"Abstract Fixed offshore platforms are structures of steel or concrete located in the middle of the sea used to export oil, trade, or military. These are designed to withstand all types of weather and dynamic loads. The response was very high under applied these loads. This paper includes a proposal to apply a new isolation system to be placed in different places on the offshore platform to reduce vibrations from high water waves. Three cases that be used, fixed-based (column connect directly to the pile), isolation system in the pile head (isolation between column and pile), and isolation system in the pile head and the middle of columns. The dynamic movements in waves were simulated using ABAQUS programs. More accurate elements and real material properties were used to bring the results closer to reality. The Computational Fluid Dynamics (CFD) method was used to study the effect of water-structure interaction and soil-structure interaction. The results show that the use of the isolation system at the base of the offshore platform has a very significant effect on decreasing the response of the platform to the loads placed on it. Where the isolation system works as a hinge at the pile head and is not allowed to move and rotate for the pile, also the moments are zero. As for the shear force, it is the least that can be compared with the other cases.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139024125","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

Managing the Utilization of Preventive Measures for Fire Resistance in the Hospitals 医院防火预防措施的使用管理

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0047

Meervat R. Altaie, I. Muhsin, M. M. Dishar

{"title":"Managing the Utilization of Preventive Measures for Fire Resistance in the Hospitals","authors":"Meervat R. Altaie, I. Muhsin, M. M. Dishar","doi":"10.2478/cee-2023-0047","DOIUrl":"https://doi.org/10.2478/cee-2023-0047","url":null,"abstract":"Abstract The study analyzed the current situation of public hospitals in the capital of Baghdad exclusively and diagnosed the resources available; especially after the high demand for these hospitals as a result of the citizen’s need to review the hospital to take care of them, especially after the Corona pandemic. Eight major hospitals in Baghdad were selected to determine the current reality of providing fire safety tools or equipment and what are the preventive measures needed to reduce it. The results after practical study showed many defects and weaknesses in the current situation due to their reliance on the traditional management to manage and provide all preventive measures and safety tools, which was also confirmed by the results of the field survey that indicated a large gap and absence of an internal protection system against fire accidents. The study concludes by suggesting basic alternatives to improve the safety of hospital buildings, including improving system evaluation, establishing a management system for firefighting equipment, periodic monitoring and accident analysis, and establishing a reliability management system for safety training. The study recommends to activating a new management system to improve the current utilization in Iraqi public hospitals.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139021328","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

Bearing Capacity Analysis of Floating Foundation Model in Homogeneous Very Soft Clay 均质极软粘土中浮动地基模型的承载力分析

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0069

S. Srihandayani, A. Hakam, Mas Mera, F. Ismail

引用次数: 0

Research on the Long-Term Acoustic Efficiency of Asphalt Mixtures Using CRM in Test Sections of Slovak Roads 在斯洛伐克道路试验路段使用 CRM 对沥青混合料的长期声效进行研究

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0053

Katarína Hodásová, Mária Trojanová, Andrej Rubint

{"title":"Research on the Long-Term Acoustic Efficiency of Asphalt Mixtures Using CRM in Test Sections of Slovak Roads","authors":"Katarína Hodásová, Mária Trojanová, Andrej Rubint","doi":"10.2478/cee-2023-0053","DOIUrl":"https://doi.org/10.2478/cee-2023-0053","url":null,"abstract":"Abstract The article presents the possibilities of utilizing waste from the automotive industry, namely old tires, in constructing pavements. The application of shredded rubber creates conditions for devulcanization, which improves the rheological properties of the binder and ensures its better dissolution in asphalt. The focus is on assessing the condition of the pavement surface, measuring the noise level in the vicinity of the road, and quantifying and evaluating the cost of implementing an asphalt pavement design with a crumb rubber modifier (CRM). A visual inspection was performed after 6 years of pavement life. Based on the inspection outputs, the pavement surface structure was in a favourable condition with no permanent deformations. Verifying the acoustic properties showed a noise reduction compared to the road section with the modified asphalt pavement surface. Currently, the price of rubber-modified asphalt for pavement in Slovakia is on average 10 to 15 % higher than the price of other modified mixes. However, we can conclude that pavements with CRM are economically and especially ecologically more advantageous in the long run.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138992561","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

Reconstruction of the Bridge Over the Hron River in Village Hronovce 重建赫罗诺夫采村赫龙河大桥

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0066

Jozef Vičan, J. Gocál, J. Odrobiňák

引用次数: 0

Suction Variation of Natural and Treated Unsaturated Gypseous Soils During Wetting 天然和经处理的非饱和粘性土在潮湿时的吸力变化

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0052

I. Hussein, M. Jassam

引用次数: 0

Using Tuff and Limestone Sand to Minimize Water Consumption of Pavement Construction in Arid Regions 利用凝灰岩和石灰岩砂最大限度减少干旱地区路面施工的耗水量

IF 1.2

Civil and Environmental Engineering Pub Date : 2023-12-01 DOI: 10.2478/cee-2023-0057

A. Mammeri, M. Lallam, Salah Eddine Guellati, Mohsen Shamsaei

{"title":"Using Tuff and Limestone Sand to Minimize Water Consumption of Pavement Construction in Arid Regions","authors":"A. Mammeri, M. Lallam, Salah Eddine Guellati, Mohsen Shamsaei","doi":"10.2478/cee-2023-0057","DOIUrl":"https://doi.org/10.2478/cee-2023-0057","url":null,"abstract":"Abstract Soil compaction is a significant parameter for road construction projects. Since materials and soil compaction play important roles in the stability and durability of roads. This study focuses on the importance of the problems related to water resources in arid regions, considering both the economy and the population in these areas. For this reason, the local materials in Bechar (Algeria) were used to enhance the road construction process. Hence, using the combination of tuff and limestone sand (LS) materials to minimize the amount of water for the road construction compaction is investigated. Different combinations, including 100% tuff, 80% tuff and 20% limestone sand, 70% tuff and 30% limestone sand, and 60% tuff and 40% limestone sand, were evaluated with the Proctor and California Bearing Ratio (CBR) tests. The test results showed that using 60% tuff and 40% limestone sand resulted in the minimum water content of 10.5% compared to other combinations of tuff and limestone sand of this study, and it will be beneficial in arid regions where there is a water shortage. Three different percentages of lime (1%,2%, and 3%) were also added to the optimum mixture. However, the results showed that adding this material has no significant mechanical effects.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138992655","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