The 2003 December 26 Bam earthquake (Iran), Mw 6.6, aftershock sequence   总被引：1，自引：0，他引：1  

M. Tatar  D. Hatzfeld  A. S. Moradi  A. Paul 《Geophysical Journal International》2005,163(1):90-105

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Tensionless–frictionless interaction of flexible annular foundation with a transversely isotropic multi‐layered half‐space          下载免费PDF全文

Morteza Eskandari‐Ghadi  Ghasem Gorji‐Bandpey  Azizollah Ardeshir‐Behrestaghi  Seyed Masoud Nabizadeh 《国际地质力学数值与分析法杂志》2015,39(2):155-174

A transversely isotropic multi‐layered half‐space, with axis of material symmetry perpendicular to the free surface, supports a flexible either annular or solid circle foundation. The contact area of the foundation and the half‐space is considered to be both frictionless and tensionless. The foundation is assumed to be affected by a vertical static axisymmetric load. Detailed analysis of the interaction of these two systems with different thickness of layers is the target of this paper. With the use of ring load Green's functions for both the foundation and the continuum half‐space, an integral equation accompanied with some inequalities is introduced to model the complex BVP. With the incorporation of ring‐shape FEM, we are capable of capturing both regular and singular solution smoothly. The validity of the combination of the analytical and numerical method is proved with comparing the results of this paper with a number of benchmark cases of both linear and nonlinear interaction of circular and annular foundation with half‐space. Some new illustrations are presented to portray the aspect of the anisotropy and layering of the half‐space. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   

Performance of Cutoff Walls Under Hydraulic Structures Against Uplift Pressure and Piping Phenomenon     

Abdolreza Moharrami  Gholam Moradi  Masoud Hajialilue Bonab  Javad Katebi  Gholamreza Moharrami 《Geotechnical and Geological Engineering》2015,33(1):95-103

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Pseudostatic approach for seismic analysis of pile group     

H. Elahi  M. Moradi  H.G. Poulos  A. Ghalandarzadeh 《Computers and Geotechnics》2010,37(1-2):25-39

This paper evaluates a simple approximate pseudostatic method for estimating the maximum internal forces and horizontal displacements of pile group subjected to lateral seismic excitation. The method involves two main steps: (1) computation of the free-field soil movements caused by the earthquake, and (2) the analysis of the response of the pile group based on the maximum free-field soil movements (considered as static movements) as well as a static loading at the pile head, which depends on the computed spectral acceleration of the structure being supported. The methodology takes into account the effects of group interaction and soil yielding at pile–soil interface. The applicability of this approach has been validated by a similar approach for single piles and then verified by both experimental centrifuge models of pile-supported structures and field measurements of Ohba-Ohashi Bridge in Japan. It is demonstrated that the proposed method yields reasonable estimates of the pile maximum moment, shear, and horizontal displacement for many practical cases despite of its simplicity. Limitations and reliability of the methodology are discussed and some practical conclusions on the performance of the proposed approach are presented.  相似文献   

Classification of Polarimetric SAR Data Based on Object-Based Multiple Classifiers for Urban Land-Cover   总被引：1，自引：0，他引：1  

Masoud Habibi  Mahmod Reza Sahebi  Yasser Maghsoudi  Shaheen Ghayourmanesh 《Journal of the Indian Society of Remote Sensing》2016,44(6):855-863

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Experimental investigation of the impact of rock dissolution on carbonate rock properties in the presence of carbonated water     

Mohsen Abbaszadeh  Masoud Nasiri  Masoud Riazi 《Environmental Earth Sciences》2016,75(9):791

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The role of tourism in rural development: Evidence from Iran   总被引：1，自引：0，他引：1  

Nooripoor  Mehdi  Khosrowjerdi  Madineh  Rastegari  Hamid  Sharifi  Zeinab  Bijani  Masoud 《GeoJournal》2021,86(4):1705-1719

GeoJournal - Tourism can play an important role in diversifying the rural economy and its expanding in rural areas contributes to the sustainability of the population and the economy of these areas...  相似文献   

Impact of Reservoir Permeability,Permeability Anisotropy and Designed Injection Rate on CO2 Gas Behavior in the Shallow Saline Aquifer at the CaMI Field Research Station,Brooks, Alberta     

Yu  Xinran  Ahmadinia  Masoud  Shariatipour  Seyed M.  Lawton  Don  Osadetz  Kirk  Saeedfar  Amin 《Natural Resources Research》2020,29(4):2735-2752

Natural Resources Research - Carbon capture and storage is part of Canada’s climate change action plan to reduce greenhouse gas emissions. The Containment and Monitoring Institute Field...  相似文献   

Validating gap-filling of Landsat ETM+ satellite images in the Golestan Province,Iran   总被引：2，自引：0，他引：2  

M. Mohammdy  H. R. Moradi  H. Zeinivand  A. J. A. M. Temme  H. R. Pourghasemi  H. Alizadeh 《Arabian Journal of Geosciences》2014,7(9):3633-3638

The Landsat series of satellites provides a valuable data source for land surface mapping and monitoring. Unfortunately, the scan line corrector (SLC) of the Landsat7 Enhanced Thematic Mapper plus (ETM+) sensor failed on May 13, 2003. This problem resulted in about 22 % of the pixels per scene not being scanned and has seriously limited the scientific applications of ETM+ data. A number of methods have been developed to fill the gaps in the incorrect images. Most of these methods have problems in heterogeneous landscapes. We applied and validated a simple and effective gap-fill algorithm developed by the US Geological Survey to a study area in the Golestan Province in the north of Iran. This algorithm operates under the assumption that the same-class neighboring pixels around the unscanned pixels have similar spectral characteristics, and that these neighboring and unscanned pixels share patterns of spectral differences between dates. For validation, unsupervised land use classification was performed on both gap-filled SLC-off data and the original “sound” data set. Classification results and accuracies were very comparable.  相似文献   

GIS-based landslide susceptibility mapping with probabilistic likelihood ratio and spatial multi-criteria evaluation models (North of Tehran,Iran)   总被引：7，自引：0，他引：7  

H. R. Pourghasemi  H. R. Moradi  S. M. Fatemi Aghda  C. Gokceoglu  B. Pradhan 《Arabian Journal of Geosciences》2014,7(5):1857-1878

The aim of this study is to produce landslide susceptibility mapping by probabilistic likelihood ratio (PLR) and spatial multi-criteria evaluation (SMCE) models based on geographic information system (GIS) in the north of Tehran metropolitan, Iran. The landslide locations in the study area were identified by interpretation of aerial photographs, satellite images, and field surveys. In order to generate the necessary factors for the SMCE approach, remote sensing and GIS integrated techniques were applied in the study area. Conditioning factors such as slope degree, slope aspect, altitude, plan curvature, profile curvature, surface area ratio, topographic position index, topographic wetness index, stream power index, slope length, lithology, land use, normalized difference vegetation index, distance from faults, distance from rivers, distance from roads, and drainage density are used for landslide susceptibility mapping. Of 528 landslide locations, 70 % were used in landslide susceptibility mapping, and the remaining 30 % were used for validation of the maps. Using the above conditioning factors, landslide susceptibility was calculated using SMCE and PLR models, and the results were plotted in ILWIS-GIS. Finally, the two landslide susceptibility maps were validated using receiver operating characteristic curves and seed cell area index methods. The validation results showed that area under the curve for SMCE and PLR models is 76.16 and 80.98 %, respectively. The results obtained in this study also showed that the probabilistic likelihood ratio model performed slightly better than the spatial multi-criteria evaluation. These landslide susceptibility maps can be used for preliminary land use planning and hazard mitigation purpose.  相似文献