Comparative study of the performance of finite element method and evolutionary model in seepage discharge predicting from the body of an earth dam
Hassan
sani
M.Sc, Department of Civil Engineering, University of Tabriz, Tabriz, Iran
author
Kiyoumars
Roushangar
Associate Professor, Department of Civil Engineering, University of Tabriz
author
Roghayeh
Ghasempour
PhD student, Department of Civil Engineering, University of Tabriz.
author
text
article
2019
per
In this study, the capability of gene expression programming (GEP) and a finite element method (SEEP/W) was assessed for predicting water seepage from body and foundation of zonouz earthen dam located in East Azerbaijan Province. Therefore, different models using observational data of Zonouz dam (water level in the reservoir, pizometer levels implanted in the body and injected tunnel dam and seepage discharge) were developed in three states: single-mode of seepage discharge related to pizometer level, single-mode of seepage discharge related to reservoir level and combined state of seepage discharge related to reservoir and pizometer level and the results were analyzed. From the sensitivity analysis the most effective parameter for any states were determined. Then the best model of GEP was reanalyzed using SEEP/W software. The results showed that the single-mode which the seepage discharge depends to only reservoir level leads to more accurate results and in this regard, the gene expression programming approach is more successful than the applied finite element method. The sensitivity analysis showed that the water level related to one day ago in pizometer which located at level of 1850m (PL105(t-1)) and reservoir level related to two days ago (RL(t-2)) are the most effective parameters in modeling.
Civil Infrastructure Researches
University of Qom
2783-140X
4
v.
2
no.
2019
1
15
https://cer.qom.ac.ir/article_1255_8216cf143d29576f87f5c1d0227c2cc1.pdf
dx.doi.org/10.22091/cer.2018.2349.1094
Numerical modeling of the flood routing and zoning by Saint-Venant in the river Bostanak
Mohammad Reza
Goodarzi
Assistant Professor, Department of Civil Engineering, Ayatollah Ozma Borujerdi University.
author
Amir
Hoseini
MSc, in engineering, Department of Civil Engineering, Ayatollah Ozma Borujerdi University.
author
text
article
2019
per
The equations governing transient open-channel flow are continuity and momentum equations that are known as Saint-Venant equation. Based on the simplifications of this equation, numerical models of flood routing are categorized. Flood routing models include: dynamic wave models, kinematic models, hydrological Knox model and Maskingham model. In this research, basics of Saint-Venant equation and numerical dynamic wave model, kinematic, Knox and Maskingham models will be explained. Also their results are compared. Also their results are compared. For this purpose, an interval of Bastanak River between Badamak and Khanimen Hydrology stations is studied and a new mathematical relationship for prediction of maximum flood flow rate, river flood plain and maximum width of flood flow is presented. MIKE11 dynamic wave model was solved by partial differential methods and showed a better result with respect to other models. Routing and mathematical zoning of flood using hydrological Maskingham method showed minimum error compared to numerical MIKE11 method and observed flood when min square method used to calculate error.
Civil Infrastructure Researches
University of Qom
2783-140X
4
v.
2
no.
2019
17
31
https://cer.qom.ac.ir/article_971_22fa6dcaea5b15e63954515667c0a46b.pdf
dx.doi.org/10.22091/cer.2017.1611.1065
Analytical comparison between seismic performance of middle-rise bundled tube and 3d moment frame structures
Vahideh
Shirvani Harandi
MSc, Faculty of Engineering, Kharazmi University, Tehran.
author
Afshin
Meshkat-Dini
Assistant Professor, Faculty of Engineering, Kharazmi University, Tehran.
author
Ali
Massumi
Professor, Faculty of Engineering, Kharazmi University, Tehran.
author
text
article
2019
per
In this study, the performance of resistant skeleton of mid-rise moment frames under scaled near-field earthquake records have been evaluated by using both, incremental dynamic and nonlinear dynamic time history analyses. Also, a brief explanation of this concept through the perspective of the formation of nonlinear hinges has been studied using modal pushover analysis. Three-dimensional propagation of seismic waves in resistant skeleton of buildings create a set of dynamic lateral forces with different intensities in the height of structure. Near-field strong ground motions are able to magnify the intensity of the mentioned forces. The studied structural models are comprising of bundled tube frame and full 3d moment frame resistant skeletons. The evaluated response parameters are the maximum interstory drift, maximum acceleration of stories, the interstory drift time history and configuration of the formed nonlinear hinges. Moreover, the IDA curves corresponding to maximum interstory drift have been drown subjected to a number of near-field ground motions. The performance of studied structures was evaluated and compared.
Civil Infrastructure Researches
University of Qom
2783-140X
4
v.
2
no.
2019
33
46
https://cer.qom.ac.ir/article_1266_d3ab8359cddc330676cf748c908c81e7.pdf
dx.doi.org/10.22091/cer.2018.3119.1116
Modeling the link beam behavior to evaluate its performance according to FEMA 356 and calculating the target displacement of performance levels
Mohammad Ali
Fathali
Department of Civil Engineering,
Faculty of Engineering,
University of Qom
author
Seyed Rohollah
Hoseini Vaez
Department of Civil Engineering, Faculty of Engineering, University of Qom
author
Ehsan
Dehghani
Department of Civil Engineering, Faculty of Engineering, University of Qom
author
text
article
2019
per
The presence of the link beam in eccentrically braced frames is primarily responsible for different behavior of this frame with other structural systems. In accordance with the FEMA 356, for the evaluation of the performance of the link beam in all of its behavioral areas, the plastic rotation of the plastic hinges is required. In many studies, for the modeling of the link beam, at two end of an elastic beam, two bending and shear plastic hinge are modeled simultaneously. In this method, it is not possible to model the generalized behavior of the beam and evaluate its performance in accordance with the FEMA 356. In this paper, a new method for modeling the behavior of the link beam is presented. According to this method, at the location of the joint formation, only one flexural joint is modeled and its behavior is determined to be equivalent to the behavior of the link beam. In addition to presenting a new method for link beam modeling, the process of calculating the target displacement for each level of performance is described. OpenSees software has been utilized to model and analyze. Finally, for verifying the process of calculating the target displacement of performance levels and the proposed modeling method, the results of nonlinear static analysis of a 2D eccentrically braced frame are presented and compared with the results of the SAP2000. Comparison of the results confirms the accuracy of the modeling and the process of calculating the target displacement.
Civil Infrastructure Researches
University of Qom
2783-140X
4
v.
2
no.
2019
47
60
https://cer.qom.ac.ir/article_1101_b063c1e78611b8594835b1956875f442.pdf
dx.doi.org/10.22091/cer.2018.3193.1118
Thermal and Chemical Analysis of Waste Modified Bitumen
Hosein
Zanjirani farahani
School of Civil Engineering, College of Engineering, University of Tehran.
author
Massoud
Palassi
Associate Professor, School of Civil Engineering, College of Engineering, University of Tehran.
author
Javad
Nemati
Department of Civil Engineering and Management, Pouyesh Industrial University.
author
text
article
2019
per
In this paper, the thermal analysis of modified bitumen by us-ing recycled and waste crumb rubber has been investigated. At first, thermal conductivity analysis of materials has been investigated with increasing temperature, and the most im-portant thermal analysis experiments, such as thermo-gravimetric analysis (TGA) and differential scanning calorim-etry (DSC) have been performed on samples. It has been ob-served that modified bitumen with recycled plastics perform better in terms of thermal analysis characteristics. Finally, FTIR analysis was performed to determine the structure of the compounds on the bitumen. and plastics were recycled and found that by modification of bitumen with recycled plastics a chemical reaction does not occur.
Civil Infrastructure Researches
University of Qom
2783-140X
4
v.
2
no.
2019
61
69
https://cer.qom.ac.ir/article_1293_745947b2a92990197a43ae5e677221eb.pdf
dx.doi.org/10.22091/cer.2018.2480.1101
Evaluation of the Seismic Vulnerability of Piles and Metal Decks Due to the Aging of the Structure
Rouhollah
Amirabadi
Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran
author
Hossein
Arbabi
MSc, Department of Civil Engineering, Faculty of Engineering, University of Qom
author
Abolfazl
Arezoumand
Lecturer, Department of Civil Engineering, Faculty of Engineering, University of Qom.
author
Mahdi
Saleh
MSc, Department of Civil Engineering, ّFaculty of Engineering, University of Qom, Qom, Iran
author
text
article
2019
per
Since ports and docks play a major role in developing a country, they should pay particular attention to these types of structures. Special attention is not just to successive build-ups, but after constructing, paying attention to these types of structures, it should have the optimal service as the first years of establishment. Pile and metal deck have been shown that vulnerable to corrosion and erosion, in the humid coastal area of the Persian Gulf, with high chloride ions. Given our country’s position in a seismic region, we must pay attention to high-value buildings against natural phenomena. Therefore, by recognizing the vulnerability of these structures against corrosion, the level of damage to the structure against the earthquake can be assessed and considered in the design process or in maintenance methods. In this paper, a conventional pile and metal deck in the Persian Gulf for 3D modeling in the SAP2000 software has been used. Five models of the docks were modeled at 0, 12.5, 25, 37.5 and 50. To investigate the response of the seismicity of the models, an increasing dynamic analysis, which includes eight seismic records in seven different scales, was used. Finally, with the help of the breakdown criteria that were extracted from the overlapping analysis, the fracturing curves of the dock were presented in three modes: service, repair and close to collapse. After analyzing and observing the data, the result is that aging changes the quiver response and IDA curves and increases the structural vulnerability.
Civil Infrastructure Researches
University of Qom
2783-140X
4
v.
2
no.
2019
71
79
https://cer.qom.ac.ir/article_1311_c8aa9f6ffb6f616e6f2350e0340b1379.pdf
dx.doi.org/10.22091/cer.2019.3738.1135