The Investigation of Progressive front and Superficial Jet Final Concentration in Deep Water
Samira
Salmanzadeh
M.Sc. Student, Faculty of Water Sciences and Engineering, Shahid Chamran University of Ahwaz
author
Javad
Ahadiyan
Associate Professor, Faculty of Water Sciences and Engineering, Shahid Chamran University of Ahwaz
author
text
article
2018
per
Abstract:The ability how to predict concentration and pollution front progressing in receiving water resources is environmentally essential, especially adjacency to the water resources entrance. Hence, this study analyses the pollution progressive front and its rate of concentration affected by discharging nozzle with various convergence angles. In this research, the conduct of experiments schedule is based on geometrical and hydraulic variable effect. The main purpose of this study is to analyze the convergence angle of flow discharging nozzle. The results obtained, showed that the convergence angle of flow discharging nozzle increase from 15̊ to 90̊ degree has a remarkable impact on pollution front progressing increase. Data analysis showed that increase in dense fluid leads to 52 percent increase in concentration rate through the trajectory center line in comparison with initial concentration. Eventually, the jet flux center line concentration rate rises by 46 percent as convergence angle increases. Keywords: Progressive front of pollution, Superficial jet, convergence angle nozzle, Deep water, Final concentration of center line
Civil Infrastructure Researches
University of Qom
2783-140X
3
v.
2
no.
2018
1
14
https://cer.qom.ac.ir/article_867_d36805cf4be25ae1b2be7fc25cee2a5f.pdf
dx.doi.org/10.22091/cer.2017.509.1018
Determination of the outflow proportion of bottom intake with trash rack by controlling the amount of opening between racks with computational fluid dynamics approach
Saeed
Farzin
Assistant Professor, Department of Civil Engineering, Semnan University.
author
Hojjat
Karami
Assistant Professor, Department of Civil Engineering, Semnan University
author
Parham
Sabetii
M.Sc. Student, Department of Civil Engineering, Semnan University
author
Shahab
Nayyer
M.Sc. Student, Department of Civil Engineering, Semnan University
author
text
article
2018
per
Tyrolean weir has a hydraulic trash rack that is installed through the river stream for water-intake. In this paper, hydraulic flow of this structure is simulated three-dimensionally, and its perfor-mance is studied through a change of the amount of the opening between trash racks. The modeling and analysis is done with AN-SYS CFX 16.0. The accuracy of numerical model and the results are confirmed by comparing the parameters such as discharge of the weir output and wetted trash rack length with models and re-sults of the prior researchers. To generalize the results, Tyrolean weir is investigated in cases of three different input discharge and three different inclinations of the trash rack from the horizon (0%, 10% and 20%). The results show that increasing the inflow in a given inclination of the weir surface, less part of the water-intake is as a slip of water over the network and pouring of that in the weir. For instance, 35% opening is required to water-intake of 50% of maximum input discharge of 12 lit/ (s.m).
Civil Infrastructure Researches
University of Qom
2783-140X
3
v.
2
no.
2018
15
24
https://cer.qom.ac.ir/article_871_7ddab7b0d9c0ec5f9ed664d2e659ebed.pdf
dx.doi.org/10.22091/cer.2017.1613.1066
Numerical Investigation on line 2 Tabriz Urban Railway Tunnel settlement due to possible excavations at the top of the Metro
Mir Hadi
Mirnaghizadeh
Ph.D Student, Geotechnical Engineering, Department of Engineering, Razi University.
author
Mohammad
Hajiazizi
Associate Professor, Geotechnical Engineering, Department of Engineering, Razi University.
author
text
article
2018
per
Today, the foundation excavation for the construction of high-rise buildings, basements, parking lots, etc. is required. Because space is limited in urban areas. The aim of this study is to answer this question is that transformation that drilling in the Line 2 subway (Case Study) creates significant or negligible. Tunnel floor deformation and deformation from 62 mm to 113 mm from 16 mm to 58 mm Bore tunnel with the size of the underground drilling of the horizontal distance is variable.Today, the foundation excavation for the construction of high-rise buildings, basements, parking lots, etc. is required. Because space is limited in urban areas. The aim of this study is to answer this question is that transformation that drilling in the Line 2 subway (Case Study) creates significant or negligible. Tunnel floor deformation and deformation from 62 mm to 113 mm from 16 mm to 58 mm Bore tunnel with the size of the underground drilling of the horizontal distance is variable.
Civil Infrastructure Researches
University of Qom
2783-140X
3
v.
2
no.
2018
25
32
https://cer.qom.ac.ir/article_1018_dfcc8db0f679352d21344b9b0c8000fc.pdf
dx.doi.org/10.22091/cer.2017.1475.1059
Amplification pattern of the ground surface including underground circular inclusion subjected to incident SH-waves
Mehdi
Panji
Assistant Professor, Department of Civil Engineering, Islamic Azad University of Zanjan.
author
Farshid
Yasemi
M.Sc. Student, Department of Civil Engineering, Islamic Azad University of Zanjan.
author
text
article
2018
per
In this paper, amplification pattern of the ground surface was presented in the presence of an underground circular inclusion by a half-plane time-domain boundary element method (BEM). Based on the mentioned method, it was required that only the interface was discretized to create the inclusion model. Avoiding from discretizing the smooth ground surface as well as enclosing boundaries were the distinguished advantages of the present study compared with traditional BEM studies. After implementing the method in a general computer algorithm, the results were verified compared to existing literature responses. Finally, with considering some intended parameters including incident wave angle, inclusion depth, horizontal location and impedance ratio, a sensitivity analysis was carried out to obtain the maximum amplification of the surface. The results showed that seismic ground response was affected from all these parameters. The results can be used about creating safe domains, passive defense topic and also validating seismic codes.
Civil Infrastructure Researches
University of Qom
2783-140X
3
v.
2
no.
2018
33
50
https://cer.qom.ac.ir/article_992_f61b04b8e67be6f2278f6021860f3f94.pdf
dx.doi.org/10.22091/cer.2017.2258.1092
Damage Detection Using Wavelet Packet Decomposition and Random Forests Algorithm in Experimental Structure at the UBC (University of British Columbia)
Omid
Habibzadeh Azari
Master of Science in Civil Engineering, Tabriz University.
author
Hosein
Ghaffarzadeh
Associate Professor, Faculty of Engineering, Tabriz University.
author
text
article
2018
per
Damage Detection methods based on signal are principal and widely used methods that contain wavelet packet decomposition, which is one of new methods in this field. On the other hand there are lots of methods and implements for evaluate models which classify data and regression.Random Forests ,which is newly used method has attracted researchers attention. In this paper a experimental structure was designed and analyzed. drifts from time history response were decomposed to energy rate indexes by wavelet packet decomposition. energy rate indexes in each damage conditions were classified in 3 class of damage conditions and they made data base. finally by training the algorithm, R-F tested other conditions with comparing data base and other near damage conditions, and classified in one of 3 classes. Random Forests precision in this research was 83% which is admissible for classifying. this algorithm can be used on other researches in the future time.
Civil Infrastructure Researches
University of Qom
2783-140X
3
v.
2
no.
2018
51
60
https://cer.qom.ac.ir/article_970_927af25cbbca3ed03e9b8af1e8bcad20.pdf
dx.doi.org/10.22091/cer.2017.2209.1091
Vulnerability assessment of RC structures by adopting an approach covering constructional and environmental impacts and presenting rehabilitation solutions-a case study of Abadan Panje Mehr Stadium
Iraj
Rasoolan
Assistant Professor, Faculty of Engineering, Shahid Chamran University of Ahwaz.
author
Seyed Ahmad
Mousavi
M.Sc. Student, Faculty of Engineering, Shahid Chamran University of Ahwaz.
author
text
article
2018
per
The catastrophic consequences of recent earthquakes and the studies concerning the resultant damage to structures has indicate that some reinforced concrete structures may have poor performance once shaken by earthquakes despite their substantial resistance to gravity loads. Environmental factors may also prove detrimental through the lifespan of the structures. Therefore, the necessity for the strengthening and rehabilitation of the structures with reliable, convenient, and quick methods arises, especially with regard to resistance to lateral loads. Since most vulnerable structures have already been built, enhancing their seismic resistance would result in some constructional problems and architectural changes. The present study investigates various types of environmental and constructional damage suffered by RC structures and the respective rehabilitation methods. In this study, the effects of environmental and construction conditions on Abadan Panje Mehr Stadium are examined. No doubt poor construction quality, bad choice of material, and the water and soil in the vicinity of the structure have contributed to the development of many cracks, resulting in the failure of the structural elements. In this study, the damage to the building has been examined, the effects of each of the above-mentioned factors are analyzed, and eventually, some practical solutions for its rehabilitation are proposed.
Civil Infrastructure Researches
University of Qom
2783-140X
3
v.
2
no.
2018
61
77
https://cer.qom.ac.ir/article_972_05eaab15486a025f72bfbe634ba68662.pdf
dx.doi.org/10.22091/cer.2017.2096.1083