Association of Arab Universities Journal of Engineering Sciences最新文献_第8页

Numerical Study on the Performance and Behavior of Two-way Reinforced Concrete Slabs with Different Types of Styropor Blocks 不同类型聚苯乙烯砌块双向钢筋混凝土楼板性能与行为的数值研究

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.023

Rand Tariq Kanaan, A. Al-Ahmed

{"title":"Numerical Study on the Performance and Behavior of Two-way Reinforced Concrete Slabs with Different Types of Styropor Blocks","authors":"Rand Tariq Kanaan, A. Al-Ahmed","doi":"10.33261/JAARU.2019.26.1.023","DOIUrl":"https://doi.org/10.33261/JAARU.2019.26.1.023","url":null,"abstract":"This paper studies the performance of two-way reinforced concrete slabs with different sizesand shapes of cavities numerically under uniform load. Nineteen simply supported slab models were modeled with dimensions of (1060 1060 70) mm. One of them wasthe reference model which was solid slab and the others were with different shapes, sizes and numbers of cavities.The slab models with cavities divided into three groupsaccording to the shape of the cavities, each group contained six slab models, first group contained slab models with square shape of cavities while the second group contained the models with diamond cavities and third group contained models with circular cavities.In each group there were different numbers of cavities (9, 16 and 25), and the thickness was either 2 cm or 4 cm. \u0000The numerical results show that, when the percentage reduction of models weight was (14 %) which is corresponding to the cavities thickness of (2 cm), for this case the ultimate load capacity reduced by (3.40 - 13.61)%. While when the percentage reduction in weight was (28 %) which is corresponding with the cavities thickness of (2 cm), the ultimate load capacity reduced by (14.97 - 24.49) %.","PeriodicalId":414074,"journal":{"name":"Association of Arab Universities Journal of Engineering Sciences","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125883348","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

Deterministic Wind Load Dynamic Analysis of High Rise Steel Buildings Including P-Delta Effects 考虑P-Delta效应的高层钢结构确定性风荷载动力分析

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.017

A. Dheeb, R. M. Abbas

{"title":"Deterministic Wind Load Dynamic Analysis of High Rise Steel Buildings Including P-Delta Effects","authors":"A. Dheeb, R. M. Abbas","doi":"10.33261/JAARU.2019.26.1.017","DOIUrl":"https://doi.org/10.33261/JAARU.2019.26.1.017","url":null,"abstract":"This study concerns with the investigation of the second-order geometric nonlinearity effects of P-Delta analysis on the dynamic response of high rise steel buildings due to deterministic wind load. Linear and nonlinear time history analyses were conducted to analyze different tall steel building models adopted in the study. Five steel building models ranging from 10 to 50 stories were numerically modeled and analyzed using finite element code ETABS (version 16.0.3). Deterministic dynamic wind load per ASCE 7-10 is applied to the buildings as a main lateral load. Comparative study between linear and nonlinear time history analyses reveals that nonlinear time history analysis including P-Delta effects displayed larger values of buildings lateral sway than those of linear time history analysis. Generally, including P-Delta effect in the nonlinear analysis increases the flexibility of the building structure, and thus increases response peak values and that peak values occur at a longer time periods indicating lesser response oscillations. The study recommends that P-Delta effect need to be addressed by any dynamic wind analysis for tall steel buildings with 20 story height or more.","PeriodicalId":414074,"journal":{"name":"Association of Arab Universities Journal of Engineering Sciences","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126771933","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

Single and Binary Adsorption of Cu(II) and Ni(II) Ions from Aqueous Solutions by Sunflower Seed Husk 葵花籽壳对水溶液中Cu(II)和Ni(II)离子的单、二元吸附

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.005

Shahad A. Abdulhussein, Abeer I. Al wared

{"title":"Single and Binary Adsorption of Cu(II) and Ni(II) Ions from Aqueous Solutions by Sunflower Seed Husk","authors":"Shahad A. Abdulhussein, Abeer I. Al wared","doi":"10.33261/JAARU.2019.26.1.005","DOIUrl":"https://doi.org/10.33261/JAARU.2019.26.1.005","url":null,"abstract":"This research presents the possibility of using sunflower seed husk as an adsorbent for the removal of Cu+2 and Ni+2 ions from simulated aqueous solution. A series of experiments were carried out in a batch reactor to obtain equilibrium data for adsorption of single and binary metal solutions. Experiments parameters such as pH, sorbent dosage, contact time, agitation speed and initial metal ions concentration were studied to optimize the best conditions. The results showed that the best parameters were evaluated to be 5, 7g/l, 120 min, 175rpm and 10mg/l for both ions, respectively. At these parameters, the monolayer adsorption capacity calculated from Langmuir model was obtained 23.4940, 11.3051 mg/g for Cu+2 and Ni+2 ions, respectively in single component system and it decreased to 18.6962, 9.2366 mg/g for binary component system, respectively and the sequence for metal ions removal in single and binary systems was Cu(II) > Ni(II) with 92.5% and 84.8% maximum removal efficiencies. Kinetic studies showed that a pseudo second order model was more suitable than the pseudo first order model.","PeriodicalId":414074,"journal":{"name":"Association of Arab Universities Journal of Engineering Sciences","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125278346","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: 8

Behavior of Plain Concrete Beam Analyzed Using Extended Finite Element Method 用扩展有限元法分析素混凝土梁的受力性能

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.016

Ali I. Taj, A. H. Al-Zuhairi

{"title":"Behavior of Plain Concrete Beam Analyzed Using Extended Finite Element Method","authors":"Ali I. Taj, A. H. Al-Zuhairi","doi":"10.33261/JAARU.2019.26.1.016","DOIUrl":"https://doi.org/10.33261/JAARU.2019.26.1.016","url":null,"abstract":"In this study, plain concrete simply supported beams subjected to two points loading were analyzed for the flexure. The numerical model of the beam was constructed in the meso-scale representation of concrete as a two phasic material (aggregate, and mortar). The fracture process of the concrete beams under loading was investigated in the laboratory as well as by the numerical models. The Extended Finite Element Method (XFEM) was employed for the treatment of the discontinuities that appeared during the fracture process in concrete. Finite element method with the feature standard/explicitlywas utilized for the numerical analysis. Aggregate particles were assumedof elliptic shape. Other properties such as grading and sizes of the aggregate particles were taken from standard laboratory tests that conducted on aggregate samples.Two different concrete beamswere experimentally and numerically investigated. The difference between beams was concentrated in the maximum size of aggregate particles. The comparison between experimental and numerical results showed that themeso-scale model gives a good interface for the representing the concrete models in numerical approach. It was concluded that the XFEM is a powerful technique to use for the analysis of the fracture process and crack propagation in concrete.","PeriodicalId":414074,"journal":{"name":"Association of Arab Universities Journal of Engineering Sciences","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128088465","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

Secure Mobile Sink Node location in Wireless Sensor Network using Dynamic Routing Protocol 基于动态路由协议的无线传感器网络移动汇聚节点安全定位

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.015

Ahmed R. Zarzoor, M. Abdullah, N. A. Shiltagh

引用次数: 6

Generate dazzling structural structures in contemporary architecture 在当代建筑中产生耀眼的结构结构

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.026

Shahad Raad Hamed, S. Ali

{"title":"Generate dazzling structural structures in contemporary architecture","authors":"Shahad Raad Hamed, S. Ali","doi":"10.33261/JAARU.2019.26.1.026","DOIUrl":"https://doi.org/10.33261/JAARU.2019.26.1.026","url":null,"abstract":"Contemporary life has been accompanied by a series of technological developments and inventions, which enthuses the designer in new challenges and on a number of its levels, whether architectural or structural, and how to combine the two in a product whose structure reflects the creators' high creative expression. Which may lead to dazzling by employing a number of styles to produce a dazzling structure. And from it emerged the research problem is (The lack of detailed studies of the strategies and mechanisms for the generation of dazzling structures in contemporary architecture) The aim of the research was to construct a theoretical framework that describes the forms of generation of dazzling structures in contemporary architecture, The research approach were concentrated in three stages of the analytical descriptive, The first is to clarify the dimensions of the research and to extract the research problem, the second is to construct a theoretical framework on the concept of dazzling and ways to achieve it; the third is to conduct the case study on the samples. It was concluded that the strategy of creation is the mother strategy to generate the dazzling structure and the other strategies revolve around its mechanisms.","PeriodicalId":414074,"journal":{"name":"Association of Arab Universities Journal of Engineering Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133109899","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

A New Mathematical Analysis of Two–Plane Balancing for Long Rotors without Phase Data 无相位数据的长转子两平面平衡新数学分析

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.006

Mohammed Tariq Sulaiman Al Abbood

{"title":"A New Mathematical Analysis of Two–Plane Balancing for Long Rotors without Phase Data","authors":"Mohammed Tariq Sulaiman Al Abbood","doi":"10.33261/JAARU.2019.26.1.006","DOIUrl":"https://doi.org/10.33261/JAARU.2019.26.1.006","url":null,"abstract":"Two–plane balancing procedure is usually adopted to balance long rotors using both vibration amplitude and phase data. This paper presents a new mathematical analysis of two–plane balancing method for long rotors using vibration amplitude data only. This method requires eight test runs with two balancing planes nearby the bearings. The tests are performed by connecting a known trial mass to eight different positions individually; four at each plane, where each position being advanced ( ) from its previous. In this study, a comparison has been performed between the new mathematical analysis and another traditional analysis presented in a previous study. Firstly, two computer programs based on both analyses have been written using Language in order to compute the magnitudes and locations of the required balancing masses. Secondly, the comparison has been made using balancing simulator for rigid rotors where different sizes of rotors at different rotation speeds have been tested. This study showed that the two–plane balancing method based on the new analysis was always capable of performing a very high grades of balance while traditional analysis showed an observed restriction in achieving a good quality of balance for the rotors been tested.","PeriodicalId":414074,"journal":{"name":"Association of Arab Universities Journal of Engineering Sciences","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130292826","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: 5

Simulation of Ammonia Nitrogen Removal from Simulated Wastewater by Sorption onto Waste Foundry Sand Using Artificial Neural Network 用人工神经网络模拟废砂吸附模拟废水中氨氮的去除

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.004

A. A. Faisal, Laith A. Naji

{"title":"Simulation of Ammonia Nitrogen Removal from Simulated Wastewater by Sorption onto Waste Foundry Sand Using Artificial Neural Network","authors":"A. A. Faisal, Laith A. Naji","doi":"10.33261/JAARU.2019.26.1.004","DOIUrl":"https://doi.org/10.33261/JAARU.2019.26.1.004","url":null,"abstract":"The present study investigated the removal efficiency of ammonia nitrogen from simulated wastewater by waste foundry sand based on 120 batch experiments which were modeled by three-layer artificial neural network technique. Contact time (5-120 min), pH of the aqueous solution (3-10), concentration (400-600 mg/L), sorbent dosage (20-120 g/100 mL) and agitation speed (50-250 rpm) were studied. Results showed that the best values of the above parameters were time of 90 min, pH= 10, 400 mg/L, dosage of 90g/100 mL and 200 rpm respectively with removal efficiency equals to 95%. The sorption process was described in a good manner using ANN model which consisted of the tangent sigmoid and linear transfer functions at hidden and output layers respectively with 8 neurons and the maximum sorption capacity was 0.9 mg/g. The sensitivity analysis signified that the relative importance of contact time equal to 36.9% and it is the influential parameter in the sorption of ammonia nitrogen. However, the relative importance of other parameters was agitation speed of 27.43%, WFS dosage of 17.32%, pH of 9.86% and initial concentration of 9.39%.","PeriodicalId":414074,"journal":{"name":"Association of Arab Universities Journal of Engineering Sciences","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129391213","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: 45

Behavior of Clay Masonry Prism under Vertical Load Using Detailed Micro Modeling Approach 竖向荷载作用下粘土砌体棱柱的细观细观建模方法

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.009

Ammar Ahmed, A. H. Al-Zuhairi

引用次数: 1

Synthesis and characterization of Graphene produced from Iraqi date syrup 伊拉克枣糖浆制备石墨烯的合成与表征

Association of Arab Universities Journal of Engineering Sciences Pub Date : 2019-03-31 DOI: 10.33261/JAARU.2019.26.1.007

Hasan Hasan Makki, H. H. Alwan

引用次数: 1