Jordan Journal of Civil Engineering最新文献

{"title":"Using Tubular Daylighting Systems to Improve Illuminance Level in Double Loaded Corridors in Educational Buildings","authors":"A. Freewan","doi":"10.14525/JJCE.10.1.3535","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3535","url":null,"abstract":"Double loaded corridors in educational buildings generally experience a low daylight level, as they do not have enough direct contact with the outdoor environment. The task light level in those corridors is lower than that in reading or office spaces. Double loaded corridors normally depend on artificial light. On the other hand, double loaded corridors need to be lit all the day during the occupation period as one can not specify when different users could use it. This research explores the possibility of using tubular light systems in addition to some architectural solutions to provide double loaded corridors with the required daylight. The research used anidolic, light pipe and ceiling cavity systems in addition to high windows from side offices to improve daylighting in double loaded corridors. The experimental study, which has taken place at JUST, showed that anidolic systems could provide double loaded corridors with sufficient lighting levels. On the other hand, radiance simulations showed that anidolic and some other solution systems can provide corridors with sufficient daylight in lower floors, while light pipes can provide corridors with sufficient daylight in upper floors.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"184-196"},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631101","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}

{"title":"Modeling of Rainfall-Runoff Relationship in Semi - Arid Watershed in the Central Region of Jordan","authors":"N. Hadadin","doi":"10.14525/JJCE.10.1.3537","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3537","url":null,"abstract":"As a result of quick progression in computer and information technologies, computer modeling has become a vital tool in watershed research and management practices. Stanford Watershed Model (SWM) is an integrated physically based Watershed model that can be used to simulate water flow stream/canal network and overland runoff, interflow and evaporation by considering the interaction between surface water and subsurface water. The objective of this study is to apply the SWM in order to estimate the rainfall-runoff relationship for Wadi Wala streamflow semi arid area with an average annual rainfall of about 300 mm/yr and a catchment area of 1800 km. SWM has been widely accepted as a tool to synthesize a continuous hydrograph of hourly or daily streamflow. Sensitivity analysis, as well as trial and error adjustment techniques were used for the optimization of the number of parameters of the model. Comparing estimated and measured surface runoff for Wala valley indicated that the model is considerably efficient in predicting the total annual surface runoff from rainfall for similar watersheds.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"209-218"},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66630923","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}

{"title":"Resilience Enhancement Methods for Water Distribution Networks","authors":"C. R. Suribabu, K. Prashanth, S. V. Kumar, N. Ganesh","doi":"10.14525/JJCE.10.1.3538","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3538","url":null,"abstract":"Water is a basic necessity of all living beings for their survival on Earth. Hence, it has to be ensured to be distributed effectively. A water distribution system is a mesh of pipelines that distribute water to consumers. They are designed to satisfy adequately the water requirements for a combination of domestic, industrial and commercial purposes. A network designed with extreme care regarding pressure, losses, supply, quality of pipes and workmanship usually satisfies adequate water pressure at the consumer's taps for a specific rate of flow in an economical manner. But, due to the unexpected vertical growth and horizontal expansion, the designed network may not supply the assessed demand. This ultimately affects the supply level of low pressure zones, as well as remote places that are far away from the source. Hence, it is necessary to consider resiliency of the network at the design level of the water distribution system which can represent the capability of the network to meet additional demands or withstand demand fluctuations that may occur during peak hours. The basic principle used to improve the resilience is to increase the diameter of the pipe to the pipeline to achieve maximum flow velocity. Increasing the diameters of the various pipes of an optimally designed network or an existing network considerably increases the efficiency of the system due to the increase in its resilience index. Parallel piping system is another option adopted to enhance resilience, in which a stretch experiencing maximum velocity is chosen. An additional pipe is installed parallel to the existing pipe in that stretch, thereby increasing the flow of water from the source and decreasing the velocity in that stretch. This ultimately increases the resilience index of the system, thereby meeting the additional demand incurred on that system. This is illustrated using two benchmark networks available in literature. The results of the study indicate that the parallel pipe approach is found to be better than increasing the pipe size approach both in terms of resilience enhancement as well as economy.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"219-231"},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66630989","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}

{"title":"Understanding the Key Factors of Construction Waste in Jordan","authors":"Jawad Al-Rifai, O. Amoudi","doi":"10.14525/JJCE.10.1.3540","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3540","url":null,"abstract":"Waste of construction materials has been recognized as a significant problem for different stakeholders involved in construction projects. This waste has negative impacts on the efficiency of the construction industry, the country economy at large and the environment. Thus, the minimization of construction wastes has become a pressing issue. This paper aims at investigating the main factors and causes contributing to material waste in the construction industry in Jordan. In order to achieve the aim of this study, a survey was carried out, employing semi-structured interview, to gather information from construction professionals about causes of waste in construction materials. The results show that the most significant factors contributing to construction waste can be categorized mainly into two groups: management-related and workforce-related. Examples of these are: 'lack of skilled workers and subcontractors' and 'lack of quality management system'. Decision makers and construction professionals can benefit from the findings of this study as input to build their strategies concerning construction waste management.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"244-253"},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631606","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}

{"title":"Investigation of the Effectiveness of Repairs and Protection Materials / Techniques for Alleviating Durability Problems","authors":"Amal Al-Far, Salam Al-Far, K. Kahhaleh, T. Al-Hadid","doi":"10.14525/JJCE.10.1.3539","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3539","url":null,"abstract":"Chloride-induced corrosion is one of the major forms of premature concrete deterioration in Jordan, particularly in the industrial structures located in the Dead Sea Region, which is one of the most severe corrosive environments in the world. Significant forms of deterioration occurred within (10-15) years of the service life of the structures. Achieving the desired service life without expending excess funds for maintenance or rehabilitation is the objective of any designer. Proper attention to durability considerations in design can greatly extend the life of a structure. High quality concrete and adequate cover provide the first line of defense against corrosion and should always be specified to assure durability. However, the experience of the research team has shown that relying solely on concrete quality and cover as a corrosion-protection strategy may not assure long-term durability and protection against corrosion-induced damage. Concrete cracking and variations in materials and construction quality can undermine the effectiveness of \"concrete only\" protection strategies. This paper presents the outcomes of a 4-year duration research work conducted to evaluate the effectiveness of some selected repair and protection materials/ techniques that are available at the Jordanian market in alleviating the problem of chloride-induced corrosion, hence improving concrete durability.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"232-243"},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631787","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}

{"title":"Nature and Influence of Contractual Claims on the Performance of Construction Projects : Evaluation for Sustainable Property Development in Nigeria","authors":"A. Ujene, U. E. Edike","doi":"10.14525/JJCE.10.1.3404","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3404","url":null,"abstract":"This study evaluates the nature and influence of contractual claims on the performance of traditional construction projects in Nigeria. The objectives are to evaluate frequency of occurrence, magnitude, as well as influence of factors on claims, influence of claims on cost, time and quality and importance of claims’ mitigation strategies. The study purposively sampled 72 contractors, 66 professionals and 45 clients using a questionnaire. Data was analyzed by using Likert scale, severity index, Mann-Whitney U and Kruskal-Wallis tests. The results show that extra-work, change orders and delay/extension claims are most frequent. Average estimated claim values vary between 6.9% and 30.7% of bid price. Stakeholders have similar view of frequency of occurrence and magnitude of claims (p-values = 0.826 and 0.972 > 0.05). There is a difference in the effect of factors between owners’ and contractors’ claims (p-value=0.001<0.05), while the influence of contractual claims does not vary among cost, time and quality (p-value=0.691>0.05). The study recommends that stakeholders should avoid claims, by placing priority on the factors with high significance. Stakeholders should adopt the identified mitigation strategies, with emphasis on holding periodic progress reviews and inspections, as well as reading and understanding the contract documents.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"40-54"},"PeriodicalIF":1.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66630664","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}

{"title":"Repair effectiveness of damaged RC beams with web opening using CFRP and steel plates","authors":"A. Ahmed, S. Naganathan, K. Nasharuddin, M. M. Fayyadh, Shojaeddin Jamali","doi":"10.14525/JJCE.10.1.3534","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3534","url":null,"abstract":"This paper presents an investigation conducted on repairing damaged Reinforced Concrete (RC) beams with a large rectangular web opening using externally bonded plates. Carbon Fiber Reinforced Polymer (CFRP) and steel plates were used as repair materials with two types of configuration hexagonal and rectangular for each material. The beams contain a rectangular web opening at one of the shear spans. The externally bonded CFRP sheet and steel plate were found to be effective in repairing RC beams with a large rectangular web opening. The results showed that CFRP plates perform better than steel plates and that the rectangular configuration is better than the hexagonal one.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"163-183"},"PeriodicalIF":1.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631036","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}

{"title":"Improvement of Mechanical Properties by Waste Sawdust Ash Addition into Soil","authors":"S. Khan, Haziq Khan","doi":"10.14525/JJCE.10.1.3402","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3402","url":null,"abstract":"The objective of this paper is to utilise waste sawdust ash in a beneficial way for geotechnical purpose. The amount of sawdust generated every year constitutes up to 10-13% of the total volume of wood log. Such an enormous amount serves as waste material for landfill and is not utilized. Effective utilization of waste Sawdust Ash to enhance the engineering properties of soil could result in solution of landfill problem which was the objective of the paper under study. Permeability and Direct Shear Test was conducted to analyse the impact of waste sawdust ash on properties of soil. After noticing the behaviour, the optimum quantity of SDA addition (12%) was selected and further compaction and shrinkage limit test on soil with 12% SDA was conducted. Dry Density of the soil was improved by 7.8%, permeability reduced by 71.8% and shrinkage limit was increased. Further, there was 22.14% increase of friction angle with addition of 12% sawdust ash and shear strength parameters were improved significantly. Overall, the SDA had positive effect on geotechnical properties of soil and it can be used as admixture in soil. This will not only solve the waste disposal problem but also improve the strength characteristics of soil.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"18-28"},"PeriodicalIF":1.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66630602","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}

{"title":"Influence of Fly Ash Content on Compaction Characteristics of Fly Ash Clay Mixture","authors":"A. Bera, Sayandeep Kundu","doi":"10.14525/JJCE.10.1.3405","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3405","url":null,"abstract":"In the present paper, a series of compaction tests have been performed to investigate the effect of fly ash content on compaction characteristics of fly ash clay mixture. Three types of fly ash and three types of clay have been used in this investigation. From the test results, it is observed that with the increase in fly ash content (0 to 25%) in the fly ash clay mixture, the value of maximum dry density decreases irrespective of type of soil, type of fly ash and type of compaction method. Fly ash content also influences significantly the optimum moisture content of fly ash clay mixture. Based on the present experimental data, a number of linear regression models have been developed to estimate the values of optimum moisture content and maximum dry density of fly ash clay mixture.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"55-66"},"PeriodicalIF":1.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66630704","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}

{"title":"Strengthening of Modified Reactive Powder Concrete Columns with CFRP","authors":"M. Medhlom, M. H. Mohammed","doi":"10.14525/JJCE.10.1.3409","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3409","url":null,"abstract":"An experimental investigation was conducted to investigate the behavior of modified reactive concrete (MRPC) columns before and after strengthening with carbon fiber reinforced polymer (CFRP) sheets jacketing under eccentric axial load. Twelve columns were tested up to failure, strengthened and retested to examine strengthening efficiency and to evaluate the effects of variation of the concrete type (normal or MRPC), presence of steel fibers and main steel reinforcement ratio. Experimental results showed that CFRP jacketing increases the ultimate failure load of strengthened columns up to 185%, highly stiffens them (reduces lateral displacements) and allow more ductile failure than the original columns. Also, inclusion of steel fibers in MRPC columns increases failure loads up to 83%, prevents spalling of the concrete cover and increase the ductility.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":"10 1","pages":"107-123"},"PeriodicalIF":1.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631138","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}