@article{ author = {BEHBAHANIH., and MOHAMMADELAHIS.,}, title = {PROPOSED MODEL FOR DETERIORATION PREDICTION OF PAVEMENT CONDITION FOR TEHRAN ROADWAY NETWORKS}, abstract ={This Paper is the result of a research project on a pavement management system that was performed by the Transportation Division of Iran University of Science and Technology. Information used in the project was gathered from 20 zones of the Tehran Municipality. Any maintenance and repair system for roads has a number of general and coordinated activities in conjunction with programming, designing, construction, Maintenance, Evaluation, and research on road pavement. Prediction of pavement condition is one of the most important parts of, such system. Prediction models have their application at the network level as well as project level activities. At the network level it is used in predicting the condition for budget programming. While in project level it is used in economical analysis. Many factors have been used in determination of pavement condition. These factors are the design life of the pavement, loading, climatic condition, and the type of road. To be able to plan for future improvements we need to predict the future condition of the pavement. In this paper, factors affecting the prediction of pavement condition are discussed. A model is developed exclusively for Tehran based on the distress data collected.}, Keywords = {}, volume = {1}, Number = {1}, pages = {1-1}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-150-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {MIVEHCHIMAHMOODR., and Ahmadi, M.T. and HAJMOMENIA.,}, title = {AMBIENT VIBRATION TESTS OF A MODERUN ARCH DAM SOME PROPOSALS FOR METHOD OF DATA PROCESSING}, abstract ={Ambient vibration test is an effective and economical method for identification of dynamic properties of structures such as dams. Mathematical models generally are developed for the design purpose. Structural and material parameter are assumed from similar projects or limited material tests. Therefore it is usually desirable to verify the results obtained from mathematical model by performing vibration test on the actual as-built structure and process its, data correctly. There are addressed in this paper. A modification of mathematical model could then be performed.}, Keywords = {}, volume = {1}, Number = {1}, pages = {7-15}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-151-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {BAZIARM.H., and ZIAIEMOAYEDR.,}, title = {EFFECT OF SILT CONTENT IN SAND ON CPT RESULTS USING CALIBRATION CHAMBERS}, abstract ={An experimental study was carried out to evaluate the influence of silt content on cone penetration measurements and its implication for soil classification. The investigation includes twenty-seven peizocone tests in saturated salty sand samples, which had been prepared in a big rigid thick walled steel cylinder-testing chamber. The samples were prepared with several different silt contents ranging from 0 to 50 percent and were consolidated at three-overburden effective stresses including 100, 200 and 300 kPa. This study showed that, the amount of silt content in sand is an important parameter affecting CPT results. As the silt content increases, the cone tip resistance decreases. The recorded excess pore water pressure during sounding was increased with increasing silt content. It is also concluded that friction ratio, in general, increases with increasing silt content. The method presented by Robertson and Wride [25] and Olsen [17] to evaluate soil classification are also verified.}, Keywords = {Cone tip resistance, Silty sand, Excess pore Water pressure,Friction ratio, Soil Classification , Cone penetration test}, volume = {1}, Number = {1}, pages = {16-27}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-152-en.html}, eprint = {http://ijce.iust.ac.ir/article-1-152-en.pdf}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {AFSHARA., and MARINOM.A., and JALALIM.R.,}, title = {OPTIMUM DESIGN OF FUSEGATES RECONCILING DAM SAFETY AND INCREASING STORAGE CAPACITY}, abstract ={The reliable operation of spillways, in emergency as well as normal conditions, is one of the vital components in dam safety. Free or uncontrolled overflow spillways are the most reliable choice however. They usually impose higher construction cost and /or results in wasting a considerable amount of water or live capacity of the reservoirs. Employing fuse gates might be a way of reconciling dam safety with maximized storage capacity. The operation of the system can be controlled to within a few centimeters, and the entire installation is not lost for floods less than the maximum design flood. The installation offers more or less the same level of safety as ungated spillways, but avoids their inherent storage capacity loss. Optimum design of fuse gates in particular installation calls for a mathematical model. The model developed in this work includes structural, hydraulics and operational constraints while maximizing the expected cost over the useful life of the project. Accounting for the lost benefit (i.e., water lost as a result of gate tilting) has an influenced effect on the optimum design. To test the performance of the model, data from Zarineh Rud dam in Iran has been used and its result is compared with a direct search technique. The model is capable of helping the design engineer to select the best alternative considering different types of constraints.}, Keywords = {Fusegate, Labyrinth, Optimization, Spillway}, volume = {1}, Number = {1}, pages = {28-32}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-153-en.html}, eprint = {http://ijce.iust.ac.ir/article-1-153-en.pdf}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {Ghafouri, H.R.}, title = {AN UNCOUPLED SOLUTION TECHNIQUE FOR THE PREDICTION OF CHANNEL MIGRATION IN MEANDERING RIVERS}, abstract ={A two-dimensional mathematical model for the prediction of time-variations of river-bend displacements was developed which is particularly applicable to meandering rivers. The computational procedure consists of two stages, that is , in the first stage by utilizing depth-averaged continuity and momentum equations, velocity field as well as water surface profile in a river is determined. The well-known Finite-Element technique was applied to the governing equations. In the second stage the rate of river bank erosion is computed in terms of determined depths and velocities. The model utilizes Odgaards (1989) bank-erosion model in this stage. The procedure is then performed repeatedly over the entire time span in a staggered manner. The developed model was applied to simulate the migration of Qezel Ozan river. The fairly good match obtained indicates the applicability of the model.}, Keywords = {MEANDER MIGRATION, SHALLOW WATER, FINITE ELEMENT TECHNIQUE}, volume = {1}, Number = {1}, pages = {33-40}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-588-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {AFSHARM.H.,}, title = {ENERGY FORMULATION OF THE PIPE NETWORK ANALYSIS}, abstract ={In this paper the analysis of the pipe networks is formulated as a nonlinear unconstrained optimization problem and solved by a general purpose optimization tool. The formulation is based on the minimization of the total potential energy of the network with respect to the nodal heads. An analogy with the analysis of the skeletal structures is used to derive tire formulation. The proposed formulation owes its significance for use in pipe network optimization algorithms. The ability and versatility of the method to simulate different pipe networks are numerically tested and the accuracy of the results is compared with direct network algorithms.}, Keywords = {Analysis, Optimization, Pipe Network}, volume = {1}, Number = {1}, pages = {48-54}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-156-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {MISAGHIF., and MOHAMMADIK., and MOUSAVIZADEHM.H.,}, title = {TIDAL LEVEL FORECASTING USING A TLRN ARTIFICIAL NEURAL NETWORKS}, abstract ={In the present paper, ANN is used to predict the tidal level fluctuations, which is an important parameter in maritime areas. A time lagged recurrent network (TLRN) was used to train the ANN model. In this kind of networks, the problem is representation of the information in time instead of the information among the input patterns, as in the regular ANN models. Two sets of data were used to test the proposed model. San Francisco Bay tidal levels were used to test the performance of the model as a predictive tool. The second set of data was collected in Gouatr Bay in southeast of Iran. This data set was used to show the ability of the ANN model in predicting and completing of data in a station, which has a short period of records. Different model structures were used and compared with each other. In addition, an ARMA model was used to simulate time series data to compare the results with the ANN forecasts. Results proved that ANN can be used effectively in this field and satisfactory accuracy was found for the two examples. Based on this study, an operational real time environment could be achieved when using a trained forecasting neural network.}, Keywords = {Tidal level, TLRN, Artificial neural network, ARMA}, volume = {1}, Number = {1}, pages = {48-54}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-155-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {AFANDIZADEHSH.,, and ZOGHIH.,}, title = {SENSITIVITY ANALYSIS OF STRATEGIC INDICATORS IN PRICING MODEL FOR INTERCITY PASSENGER SERVICE}, abstract ={Since Road transportation accounts for a large portion of total displaced passengers of Different types it is the most important mode of passenger services in Iran. The costs considered are depreciation, investment, insurance, tax, fuel, tires, main repairs, unexpected repairs, oil filter break shoe. Lubrication, batteries, commission, wages and other miscellaneous costs. These are classified into two categories of fixed and variable costs that it-ere analyzed. The data used is obtained, from the Iranian passenger transportation co- operatives based on their real costs in Fear 2002 . The methodology of determination rate of return and Passenger Transportation Price are described and these parameters are calculated. In this paper, a price model based on the economic techniques and sensitlvtfx. Analysis is presented for operators and managers. Pricing model of passenger service is prepared by the authors by the name of Development of Pricing Model of passenger Services in Intercity Roads . This research is pointing to Model Sensivity Analysis Dependent on Various Indicators.}, Keywords = {}, volume = {1}, Number = {2}, pages = {55-64}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-1070-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {SAFFARZADEHM., and BAHRAMIANH.R.,}, title = {DEVELOPING AN OPTIMUM INCOME CREATING MODEL FOR PROFIT MAKING OF AIR TRANSPORTATION SYSTEM}, abstract ={In this paper an attempt is made to develop a model to increase profit-making in air transportation system taking into consideration of the most important problems encountering the system. Utilizing the outcomes of this model, general policies for investing capital to carne out profit-making projects can be recognized.In the presented model the least squares and non-linear optimization methods have been utilized to recognize unknown quantities. In addition, to simplify the developed model and obtain numerical results, the available potential for increasing profit-making in the system has fallen into three major categories. Moreover, profit-making sources have been classified in five distinguished sections.Since recognizing the utilized coefficients in the model claims extensive studies, in most of the cases, the air transport experts and authorities comments have been taken into consideration and an attempt has been made to adapt these coefficients to real values.}, Keywords = {}, volume = {1}, Number = {2}, pages = {65-71}, publisher = {}, title_fa = {DEVELOPING AN OPTIMUM INCOME CREATING MODEL FOR PROFIT MAKING OF AIR TRANSPORTATION SYSTEM}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-142-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {Khaloo, A.R. and MOLAEEA.,}, title = {FREEZE AND THAW, AND ABRASION RESISTANCE OF STEEL FIBER REINFORCED CONCRETE (SFRC)}, abstract ={An experimental program was carried out to investigate the behavior of steel, fiber reinforced concrete (SFRC) under abrasion and cycles of freeze and them. Compression and flexural tests were also performed in order to reach a comprehensive conclusion of the response. In total, over 200 specimens were tested The test variables included two concrete strength., (i. e., 28 MPa as Normal Strength (NSFRC) and 42 MPa as Medium Strength (MSFRC)), four volumetric percentage of fibers (i.e., 0%, 0,5%, 1.0% and 1.5%) and two fiber lengths (i.e.. 25mm and 35rnrn).Cube specimens were tested according to ASTM C6661n-ocedrrre B using 100 cycles of freeze and thaw. The Los Angeles test method for testing aggregate was used to evaluate the abrasion resistance of SFRC.Test results of1VSFRCptesertted improvements up to 39% and 32 % in cylindrical and cubic compressive strength, respectively. and 88�o in modulus of rupture, 57% in resistance against abrasion based oil weight loss and 40% against compressive strength reduction due to freeze and thaw cycles. The corresponding improvements for MSFRC were 18%, 16%, 48%, 53% and 46% respectively.Increase in cocncrete strength from 28 Ala to 42 MPa provided higher freeze and thaw and abrasion resistance than addition of 1.5% of steel fibers to the normal strength concrete matrix.}, Keywords = {}, volume = {1}, Number = {2}, pages = {72-81}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-143-en.html}, eprint = {http://ijce.iust.ac.ir/article-1-143-en.pdf}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {ASGHARIK.,}, title = {PETROV GALERKIN FINITE ELEMENT ANALYSIS OF SHALLOW WATER EQUATIONS KAYVAN ASGHARI}, abstract ={The solution of shallow-water equation for a two-dimensional .simulation of overland /low for an actual watershed, is presented. The Petorv-Galerkin weighted residual method is used to overcome spurious oscillations inflow depth. For modeling overland flow over complex topography and variable surface, ct pre and postprocessor was developed to utilize the Triangulated Irregular Network (TIN) model and to generate finite element mesh. Close agreement of the model with measured data is obtained. This model can be used to better analyze the influence of varying surface roughness and topography on overland flow characteristics, including distribution of flow depth and velocity (is well as resulting hydrographs. Detailed spatial and temporal output parameters provide a basis fur further study of the patterns of soil erosion and evaluation of runoff natural slopes.}, Keywords = {shallow wetter equations, discontinuous flow. Petrov,Galerkin finite element. actual watershed}, volume = {1}, Number = {2}, pages = {82-91}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-1071-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {AFSHARM.H.,}, title = {LINEAR AND QUADRATIC LEAST SQUARES FINITE ELEMENT METHOD FOR INCOMPRESSIBLE FLUID FLOW}, abstract ={A least squares finite element method for the .solution of steady incompressible Navier Stokes equations is presented. The Navier-.Stocks equation is first recast into a system of first order partial differential equations with the velocitv. pressure and the vorticity as the main variables. Finite element discretization of the domain introduces a residual in the governing equation which is subsequently minimized in a least squares sense. The method so developed clearly. falls into the minimization category card hence circumventing the L.B.B. condition. Furthermore. the method produces symmetric positive definite matrices which makes the way for using more efficient iterative sobers. A Conjugate Gradient algorithm is, therefore, used for the solution of the resulting .system of linear algebraic equations. To improve the efficiency , of this iterative solver an incomplete Cholesky factorization of the stiffness matrix is used as ct pre-conditioner. Since the storage requirement of the Cholesky factor depends on the bandwidth of matrix. an effective algorithm for the reduction of this bandwidth has also been employed. The application of the method to solve cavity problem and .step flow with different Remolds number is presented to show the applicability of the method to solve practical flows of incompressible fluid The use of both linear and quadratic elements with selective reduced integration is also investigated and the results are presented.}, Keywords = {}, volume = {1}, Number = {2}, pages = {92-99}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-145-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {PAKBAZM.C., and AHMADIC.,}, title = {LABORATORY EVALUATION OF EROSION CHARACTERISTICS OF GROUT SUSPEN SIONS}, abstract ={This research include, more than 400 erosion tests performed on coarse and fine grain suspension materials. The purpose of tests was to determine erosion characteristics of mixtures of different materials. Samples of the .same constituents in different groups were cured tit two different setting time of // and 16 !tours before they were subjected to the constant hydraulic heads of 20 and 40 cm for ct time period of 30 urinates. The amount of erosion was measured as the weight loss of the samples offer the test. /n general the lower setting tune and the higher hydraulic head for a large group of samples showed higher erosion. For uniform sand samples when the cement content was 60-70 % the percentage of erosion (PE) was below 2. For the mixture of sand-cement, with the clay content below, 20% the percentage of erosion was below 2 and it increased to 15.5 for the clan, content of 58dc. Die addition of bentonite in the soil-cement mixtures in general did not affect the erosion.}, Keywords = {Erosion, Sand, Clay, Bentonite, Grout, Hydraulic gradient}, volume = {1}, Number = {2}, pages = {100-113}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-146-en.html}, eprint = {http://ijce.iust.ac.ir/article-1-146-en.pdf}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {SHOOSHPASHAI.,}, title = {STUDY ON LOCAL VOLUME CHANGE INDUCED BY MOISTURE FLOW IN UNSATURATED SAND-BENTONITE}, abstract ={This study was designed to investigate the local volume changes induced by swelling pressure in unsaturated stand-bentonite bused buffer material. A laboratory mixture of sodium bentonite (lilt/ well graded silica stool in equal proportion by do weight was used for moisture floss experiments in both ambient and elevated temperatures. Experimental results have shown that tit high water content locations within the tested specimens, the density was reduced by .3.57% from its initial values clue to swelling. The swelling pressure was calculated by 4 different models as a function of distance. The calculated results have indicated that the density distribution within the .specimen is affected by swelling potential distribution. The calculated swelling pressure values van as u function of water content, reaching I MPa at the source of water intake, i.e., at high water content :.one, and 2 MPa cot the heater .side, i.e., cot low water content .one.}, Keywords = {Barrier, Radioactive, Diffusivity, Conductivity and Buffer}, volume = {1}, Number = {2}, pages = {114-122}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-147-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} } @article{ author = {ASGHARIK.,}, title = {PETROV GALERKIN FINITE ELEMENT ANALYSIS OF SHALLOW WATER EQUATIONS KAYVAN ASGHARI}, abstract ={The solution of shallow-water equation for a two-dimensional .simulation of overland /low for an actual watershed, is presented. The Petorv-Galerkin weighted residual method is used to overcome spurious oscillations inflow depth. For modeling overland flow over complex topography and variable surface, ct pre and postprocessor was developed to utilize the Triangulated Irregular Network (TIN) model and to generate finite element mesh. Close agreement of the model with measured data is obtained. This model can be used to better analyze the influence of varying surface roughness and topography on overland flow characteristics, including distribution of flow depth and velocity (is well as resulting hydrographs. Detailed spatial and temporal output parameters provide a basis fur further study of the patterns of soil erosion and evaluation of runoff natural slopes.}, Keywords = {shallow wetter equations, discontinuous flow. Petrov,Galerkin finite element. actual watershed}, volume = {1}, Number = {2}, pages = {114-122}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, url = {http://ijce.iust.ac.ir/article-1-144-en.html}, eprint = {}, journal = {International Journal of Civil Engineering}, issn = {1735-0522}, eissn = {2283-3874}, year = {2003} }