Faculty of Civil Engineering And Transportation
The Faculty of Civil Engineering and Transportation at University of Isfahan, established in 1995, is a regional leader in infrastructure research with specialized laboratories in structural engineering, geotechnics, transportation systems, and water resources management.
https://civil.ui.ac.irThe Faculty of Civil Engineering and Transportation at University of Isfahan has played a pivotal role in developing Iran s infrastructure since its establishment. With 6 research centers including the Earthquake Engineering Lab (equipped with a shake table), the Advanced Materials Testing Facility, and the Intelligent Transportation Systems Center, the faculty conducts cutting-edge research with annual funding exceeding $2 million. The faculty offers accredited programs in structural engineering, transportation engineering, geotechnical engineering, and water resources engineering at both undergraduate and graduate levels. Notable projects include consulting on the Isfahan Metro system, seismic retrofitting of historical bridges, and developing sustainable urban drainage systems. The faculty maintains strong ties with industry partners such as MAPNA Group and Irans Road Ministry, resulting in 45 joint projects in the past five years. International collaborations include the Erasmus+ program with Technical University of Munich and research partnerships with University of Tokyo in disaster resilience engineering.
Regarding the complexity of natural disasters in cities and the urgent need to employ methods in order to reduce the risk in residential areas, the risk management as a new and effective method in preventing and preparation for critical situations, has been employed in different ways throughout the world. Risk management includes a set of processes needed for identification, analysis and reaction against the crisis that aims at maximization of desired goals and minimization of risks and adverse consequences. This paper intends to present a GIS-based fuzzy approach for risk assessment in residential areas. Places such as medical centers and parks are effective factors in reducing the risk and the gas stations and high voltage power stations are factors that increase the risk. Now regarding the distance between each urban feature and the above features, fuzzy linguistic variables are defined and according to the rules extracted by expert, the risk of each feature is separately estimated and designed as a risk map for each area. Now with the help of this map, we can reduce the risk to which every building is subjected by constructing the needed centers and also fortification plans. © Gi4DM 2011 - GeoInformation for Disaster Management.All right reserved.
Road accidents are one of the major causes of mortality around the world and over 1,300,000 people are killed annually in the road accidents. Most of fatal accidents occur on the roads outside the city. Some of the casualties are killed in the crash moment and the others after the accident, mostly due to late arrival of rescue groups. The late arrival of rescue groups is mostly because of the lack of rapid and timely notice from accident. For this reason, this paper proposes the employment of location-based service to develop a system that can be used easily to locate an accident more quickly and inform emergency service to accelerate the transfer of victims to medical centers. This system is composed of two parts. The first part of the system is activated when something hits the impact sensors embedded in the vehicle and then it captures the location of vehicle via GPS. Employing GSM, the first part of the system sends an SMS which contains the location and other necessary information of vehicle to the second part of system which is situated in the emergency center. After the SMS is delivered, the system is able to locate the accident on the map and dispatch the rescue groups to the place of accident. © Gi4DM 2011 - GeoInformation for Disaster Management.All right reserved.
Canadian Journal of Civil Engineering (03151468)23(5)pp. 1051-1063
The Geological Survey of Canada is currently producing a suite of new hazard maps for Canada. These maps take into account the additional recorded data obtained during the past 13 years, as well as the new geological and tectonic information that has recently become available. They provide elastic spectral acceleration values for a uniform probability of exceedance of 10% in 50 years. A method of using the uniform hazard spectral values to obtain design response spectral curves for different values of ductility is presented here. The method uses two spectral values obtained from the hazard maps, the peak spectral acceleration for the site and the spectral acceleration corresponding to a period of 0.5 s. Empirical expressions are developed to represent the design response spectra. It is shown that by using inelastic spectral accelerations rather than the elastic spectral values in association with a reduction factor, the new method provides a more reliable estimate of the design forces.
Canadian Journal of Civil Engineering (03151468)25(1)pp. 1-15
Observations during many earthquakes have shown that building structures are able to sustain without damage earthquake forces considerably larger than those they were designed for. This is explained by the presence in such structures of significant reserve strength not accounted for in design. Relying on such overstrength, many seismic codes permit a reduction in design loads. The possible sources of reserve strength are outlined in this paper, and it is reasoned that a more rational basis for design would be to account for such sources in assessing the capacity rather than in reducing the design loads. As an exception, one possible source of reserve strength, the redistribution of internal forces, may be used in scaling down the design forces. This is because such scaling allows the determination of design forces through an elastic analysis rather than through a limit analysis. To assess the extent of reserve strength attributable to redistribution, steel building structures having moment-resisting frames or concentrically braced frames and from 2 to 30 storeys in height are analyzed for their response to lateral loading. A static nonlinear push-over analysis is used in which the gravity loads are held constant while the earthquake forces are gradually increased until a mechanism forms or the specified limit on interstorey drift is exceeded. It is noted that in moment-resisting frames the reserve strength reduces with an increase in the number of storeys as well as in the level of design earthquake forces. The P-Δ effect causes a further reduction. In structures having braced frames the main parameter controlling the reserve strength is the slenderness ratio of the bracing members. In these structures, reserve strength is almost independent of both the height of the structure and the effect of building sway.
Canadian Journal of Civil Engineering (03151468)27(3)pp. 563-580
The use of uniform hazard spectra for obtaining the seismic design forces is being considered for the next version of the National Building Code of Canada. Such spectra provide the spectral accelerations of a single-degree-of-freedom system for a range of periods but for a uniform level of hazard. One of the issues that need to be resolved before uniform hazard spectra are used in the design of multistorey buildings is the adjustment required in the base shear to account for the higher mode effects present in a multi-degree-of-freedom system. This issue is examined through analytical studies of the response of idealised elastic and inelastic multistorey building frames to ground motions representative of the seismic hazard in the eastern and western regions of Canada. Representative values are obtained for the adjustment factors that must be applied to the design base shear and to the base overturning moment.
Shock and Vibration Digest (17413184)32(1)pp. 67-67
The use of uniform hazard spectra for obtaining the seismic design forces is being considered for the next version of the national building code of Canada. Such spectra provide the spectral accelerations of a single-degree-of-freedom system for a range of periods but for a uniform level of hazard. One of the issues that needs to be resolved before uniform hazard spectra are used in design is the adjustment required in the base shear to account for the higher mode effects present in a multi-degree-of-freedom system. This issue is examined through analytical studies of the response of idealized multistorey building frames to ground motions representative of the seismic hazard in east and west Canada.
Proceedings of SPIE - The International Society for Optical Engineering (1996756X)3957pp. 398-402
Virtual Reality (VR) is a possible which brings users to the reality by computer and Virtual Environment (VE) is a simulated world which takes users to any points and directions of the object. VR and VE can be very useful if accurate and precise data are used, and allows users to work with realistic model. Photogrammetry is a technique which is able to collect and provide accurate and precise data for building 3D model in a computer. Data can be collected from various sensors and cameras, and methods of data collector are vary based on the method of image acquiring. Indeed VR includes real-time graphics, three-dimensional model, and display and it has application in the entertainment industry, flight simulators, industrial design. Above definitions describe the relationship between VR and VE with photogrammetry. This paper describes a reliable and precis method of data acquiring based on close range photogrammetry for building a VR model. The purpose of this project is to make a real possibility for seismic designers to investigate all effects of shaking on a real building. Minar Gonban is an ancient building with two amazing minarets at Esfehan IRAN. While one of them was shaken the second one started to shake. The project is fulfilled on this building because building simply can be shaken and its effects can be investigated. The building was photographed by multiple movie cameras and photo cameras. Sequence images were restored in a computer for creating sequence models of building. A VR model is builded based on extracted data from photogrammetry images. The developed VR model is precise and reliable and provides real possibility for users to investigate the effects of shaking on the building. The developed VR model is based on real data. The results verify a reliable VR can be useful for human life because one of its application can help to investigate effects of earthquake on the building and duce its casualty.
Institute of Physics Conference Series (09513248)180pp. 25-34
Geometry has a ritual origin and utilisation of Sacred Geometry by man goes back many centuries. Certain specific ratios can be found in the design of lifeforms in nature Traditional civilisations regarded architecture as a sacred means by which the heavens were manifested. Persian architecture utilised proportions comprehensively and by means of Sacred Geometry measured the proportions of heaven and reflected them in the dimensions of buildings on Earth. In this paper, the design of a number of Persian historical buildings by the use of the science of geometry will be presented. The geometric factors upon which the design of these buildings is made, from both architectural and structural viewpoints, will be discussed and common design laws between Persian monuments and creatures in nature will be explained.
Advances in Earthquake Engineering (1361617X)13pp. 157-165
Iranian traditional domes are of the most notable samples of traditional construction in Iran spanning thousands of years, many of which have been standing on seismic parts of the country for many centuries. Structurally, Iranian domes can be categorised into single, double and triple-shell domes. Single-shell domes are the earliest type of domes. The single-shell is the main load bearing part. Double-shell domes consist of two shells, and they are divided into continuous and discontinuous types. In continuous double-shell domes the distance between the two shells is small and shells are connected by brick connectors. In discontinuous double-shell domes there is a considerable distance between the two shells. For the structural stability of some domes meridional walls or stiffeners are built in the space between the two shells. There are also a few domes with three shells. In this paper, structural systems of a number of Iranian historical domes made of masonry materials will be discussed and their structural strength and stability due to dynamic effects of earthquakes will be presented. The document will also explain the structural role of meridional stiffeners in double-shell domes.
CTIT workshop proceedings series (16821750)35
In the context of the analysis of remotely sensed data the question arises of how to analyse large volumes of data. In the specific case of agricultural fields in flat areas these fields can often be modelled in terms of geometric primitives such as triangles and rectangles. In this case the options are classical i.e. bottom-up, starting at the pixel level and resulting in a segmented, labelled image or top-down, starting with a model for image partitioning and resulting in a minimum cost estimation of shape hypotheses with corresponding parameters. Standard bottom-up classification methods usually concern the pixel as a main element and try to label the pixel individually. But various errors are involved in the image analysis with these methods. Mixed pixels, simplicity of the basic assumptions in the classification algorithms, sensor effects, atmospheric effects, and radiometric overlap of land cover objects lead to the wrong detection in image analysis. In this paper we propose a Model-Based Image Analysis (MBIA) approach to analyze the remotely sensed data. In this manner using the available knowledge about the remote sensing system we generate some hypothesis maps and then test them using the radiometric measurements (images). In order to test the method we used the boundaries of the agricultural fields stored in a GIS to model the objects in the scene. The results of the method have been compared with the result of a traditional Maximum-Likelihood classification and a standard Object-Based Classification using the boundaries. Using this approach we could reach to the 94% overall accuracy. © 2004 International Society for Photogrammetry and Remote Sensing. All rights reserved.
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