Jordan Journal of Civil Engineering最新文献

Mapping Floods during Cloudy Weather Using Radar Satellite Images 利用雷达卫星图像绘制阴天洪水地图

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.03

Nawras Shatnawi

{"title":"Mapping Floods during Cloudy Weather Using Radar Satellite Images","authors":"Nawras Shatnawi","doi":"10.14525/jjce.v18i1.03","DOIUrl":"https://doi.org/10.14525/jjce.v18i1.03","url":null,"abstract":"Monitoring floods using optical satellite images in winter is challenging. Because of the thickness of clouds, the electromagnetic bands used by satellites are too narrow and the resulting signals are reflected into space. The purpose of this study is to assess the potential of implementing a high-resolution synthetic aperture radar system (SAR) for the purpose of mapping floods in Jordan while the weather is cloudy. TerraSAR-X satellite was utilized to acquire images of high resolution for flood monitoring. This research employed TerraSAR-X thresholding images to identify flood-prone areas and track floods over time using time-series images. It was possible to determine the places of the landscape that have been impacted by the flood and to establish the degree of damage by conducting an analysis of the changes that have occurred in the landscape. The accuracy of the study's findings was confirmed using backscatter texture analysis on the images, which revealed a small difference between thresholding and texture analysis approaches of less than 3% in the mapped test region's flood area. While monitoring floods, it is recommended to use TerraSAR-X images, particularly in conjunction with other data sources, such as weather predictions and hydrological models. KEYWORDS: Flood mapping, Polarimetric SAR, TerraSAR-X, Texture analysis, Thresholding, Interferometric SAR","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":" 698","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139391812","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

Expansive Soil Stabilization Using Steel Factory Dust 利用钢铁厂粉尘稳定膨胀性土壤

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.11

Z. Abdalqadir

{"title":"Expansive Soil Stabilization Using Steel Factory Dust","authors":"Z. Abdalqadir","doi":"10.14525/jjce.v18i1.11","DOIUrl":"https://doi.org/10.14525/jjce.v18i1.11","url":null,"abstract":"One of the geotechnical-engineering roles is soil stabilization, because it affects the long-term strength and functionality of structures. For suitability and durability of expansive soils for construction projects, shear strength, bearing capacity and other characteristics can be enhanced through the stabilization process. This study is focused on the effects of steel factory dust (SFD) as an additive on the improvement of the undesired geotechnical properties of expansive soil (CH soil). A series of laboratory tests were conducted on intact and treated samples. SFD was added by 0, 2, 4, 6, 8 and 10% to the dry soil. The conducted tests are consistency, specific-gravity, modified Proctor compaction, swelling-pressure and -percent and unconfined compression tests. The addition of SFD reduced the values of liquid and plastic limits, plasticity index, modulus of elasticity and allowable bearing capacity. Significantly, the 10% SFD addition significantly reduced swelling percent and pressure by 26.8% and 25.4%, respectively while notably increasing the unconfined compressive strength (UCS) from 475 MPa to 629 MPa. SFD was found to be a successful waste material in improving expansive soil by using 10% as the best addition percent, which usefully saves the environment. KEYWORDS: Expansive soil, Stabilization, Steel factory dust, Swelling, Unconfined compressive strength. INTRODUCTIO","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"47 32","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139394868","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

Study On Axial Stretching Mechanical Property Of Plant Fiber Reinforced Cementitious Composites 植物纤维增强水泥基复合材料的轴向拉伸力学性能研究

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.05

Xinyuan Wang

引用次数: 0

Optimal Design of Truss Using a Hybrid Method Based on Particle Swarm Optimizer and Harris Hawk Algorithm 使用基于粒子群优化器和 Harris Hawk 算法的混合方法优化桁架设计

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.07

M. Yassami

引用次数: 0

Assessing the Accident-Cost Relationship in Building Construction Projects Using Structural Equation Modeling 利用结构方程模型评估建筑施工项目中的事故与成本关系

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.02

Milad Ghanbari

{"title":"Assessing the Accident-Cost Relationship in Building Construction Projects Using Structural Equation Modeling","authors":"Milad Ghanbari","doi":"10.14525/jjce.v18i1.02","DOIUrl":"https://doi.org/10.14525/jjce.v18i1.02","url":null,"abstract":"This study aimed to evaluate the accident-causing factors affecting the total cost of building construction projects using a structural-equation model (SEM). Through the analysis of 35 identified factors categorized into construction, natural disaster, physical and human and psychological domains, this study examined their effects on project costs. The data collected from 120 construction experts in Iraq was analyzed using the SmartPLS software. This study assessed the fit of the measurement model using the following key criteria: reliability, convergent validity and divergent validity. All latent constructs demonstrated Cronbach’s-alpha values of above 0.70 and composite-reliability (CR) values of above 0.70, indicating their reliability. The average variance extracted (AVE) values exceeded the 0.5 threshold, confirming convergent validity. The model also demonstrated acceptable discriminant validity. The results confirmed the significant impact of accident-causing factors on project costs, with \"excessive physical activity,\" \"storm,\" \"improper ventilation,\" \"low motivation and low efficiency of the workers,\" and \"fire, explosion and vibration\" emerging as the top five influencing factors. These findings emphasized the need for tailored safety measures to mitigate such risks. The study underscored the importance of addressing accident-causing factors to enhance both safety planning and financial outcomes in building construction projects. KEYWORDS: Accident-causing factors, Project cost, Construction-project management, Safety assessment, Structural-equation modeling","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":" 26","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139391939","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

Using Palm Oil Fuel Ash as a Source Material for Alumina Silicate 使用棕榈油燃料灰作为硅酸铝的原材料

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.09

Rehaman Dudekula

引用次数: 0

Evaluating Manning's Roughness Coefficient for Flows with Equilibrium and Non-equilibrium Sediment Transport 评估具有平衡和非平衡沉积物迁移的水流的曼宁粗糙度系数

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.06

Miskar Maini

{"title":"Evaluating Manning's Roughness Coefficient for Flows with Equilibrium and Non-equilibrium Sediment Transport","authors":"Miskar Maini","doi":"10.14525/jjce.v18i1.06","DOIUrl":"https://doi.org/10.14525/jjce.v18i1.06","url":null,"abstract":"One of the challenges in using Manning’s equation lies in accurately determining Manning’s roughness coefficient, especially due to sediment transport. The condition of sediment transport within a specific section of a river can be in equilibrium, meaning that the amount of sediment entering and exiting the segment is balanced or it can be in non-equilibrium, where there is an imbalance between the sediment entering and leaving the segment. Experiments were carried out in the laboratory to simulate both transport conditions, one involving sediment feeding (equilibrium condition) and the other without sediment feeding (non-equilibrium condition). A total of 180 mean velocity profiles were measured using an acoustic doppler velocimeter (ADV) in fixed and movable bed flows. The present experiment was combined with theoretical approaches to evaluate Manning’s coefficient in open channels under sediment transport-flow conditions and reach conclusive results. The shape of the velocity profile, u/U, for flows over a movable bed with sediment feeding is “slender” compared to those without sediment feeding. The presence of sediment transport affects the shape of the velocity profile, especially in the inner region, influencing Manning's roughness coefficient. This coefficient can be determined from two-point velocity measurements at z/H = 0.1 and 0.2 for fixed and movable bed flows with and without sediment feeding, respectively. On average, sediment feeding increases the coefficient by 19% compared to the non-sediment feeding case. KEYWORDS: Manning’s roughness coefficient, Velocity profile, Equilibrium and non-equilibrium, Sediment transport, Open-channel flow","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"30 5","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139394598","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

Fire Performance of Reinforced Concrete Slabs: Direct Flame Effects 钢筋混凝土板的防火性能：火焰的直接影响

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.08

Raneen Aldarf

引用次数: 0

Detection of Sub-surface Delamination and Moisture Penetration in Unlined Rock Tunnels Using Passive Thermography and Tapping 利用被动热成像技术和攻丝技术检测无衬砌岩石隧道的地下分层和湿气渗透情况

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.01

Jungwon Huh

{"title":"Detection of Sub-surface Delamination and Moisture Penetration in Unlined Rock Tunnels Using Passive Thermography and Tapping","authors":"Jungwon Huh","doi":"10.14525/jjce.v18i1.01","DOIUrl":"https://doi.org/10.14525/jjce.v18i1.01","url":null,"abstract":"An unlined rock-blast tunnel constructed by the drill and blast method is susceptible to frequent deterioration, including sagging beds, water ingress and loose rock masses. Thus, assessing potential damages above the roadway that may impact the safety of tunnel users is of utmost importance. While tapping, a conventional nondestructive method, is typically used to predict sub-surface delamination, water ingress can be identified with the naked eye. In this research, we utilized a modern-technology approach called passive thermography, together with a high-resolution digital camera and tapping. The study encountered two primary challenges; namely, the absence of direct solar radiation during the inspection and the groove-exposed surface of the unlined tunnel. The results demonstrated that passive thermography was able to detect delaminated areas and water infiltration on the tunnel's walls and ceiling, even without direct sunlight. Large delaminated areas can be detected with just a 2°C change in atmospheric temperature twelve hours before testing. Additionally, the results of image post-processing significantly contributed to enhancing the results of passive thermography. The thermal image was processed into a grayscale image prior to HE processing, which enhances contrast by over 50%. The combination of tapping, digital camera and passive thermography was proven to be effective in periodically inspecting unlined rock tunnels, while significantly reducing time and cost. KEYWORDS: Tunnel safety, Passive thermography, Old rock-cut tunnel, Hammer sounding, Non-destructive evaluation, Image post-processing.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":" 26","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139392802","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

Rehabilitation of Fire-damaged Reinforced-concrete Slabs Using Ferro-cement 使用铁水泥修复受火灾破坏的钢筋混凝土楼板

IF 1.1

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI: 10.14525/jjce.v18i1.10

Raneen Aldarf

{"title":"Rehabilitation of Fire-damaged Reinforced-concrete Slabs Using Ferro-cement","authors":"Raneen Aldarf","doi":"10.14525/jjce.v18i1.10","DOIUrl":"https://doi.org/10.14525/jjce.v18i1.10","url":null,"abstract":"his study was conducted to investigate the effect of strengthening with ferro-cement on the flexural behavior of two-way RC slabs after exposure to direct fire. Twelve reinforced-concrete slabs were exposed to direct fire for one hour and cooled with air and water. They were then rehabilitated with a layer of ferro-cement using different bonding patterns (surface roughening, SBR material and screws). The effect of these variables was studied on the load-deflection relationship, ultimate load capacity, stiffness, energy absorption, ductility factor and strains of the compressed zone. The results showed a significant improvement in all the investigated parameters, demonstrating the efficiency of ferro-cement strengthening in improving the behavior of the slabs. It contributed to increasing the ultimate load capacity and initial stiffness of the slabs and to preventing and arresting crack propagation after cracking and even after reaching collapse. The effectiveness of SBR material in ensuring the bonding between the surface of the damaged slabs and the reinforcement layer was also revealed. KEYWORDS: Solid slab, Direct fire flame, Ferro-cement, Rehabilitation, SBR (styrene-butadiene rubber), Roughing.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":" 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139393191","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