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Numerical Modeling of Jet Grouting Cells to Reduce Liquefaction 2019 منبع @Civilbest - Jet Grouting , Liquefation.pdf

Numerical modelling of steel-plate concrete composite shear walls Nam H. Nguyena,Andrew S. Whittakerb منبع @Civilbest, nguyen2017.pdf

Deformation Performance of the Karkheh Earth Dam with Mixed and Pure Clay Coreunder Seismic Excitations Majdedin Mir Hosseini; R. Bahrami; M. AsadolahiPajouh The number of constructed dams has been largely increased due to high demands of water supplies, and earth dams are the most common types since they are more compatible to the environment. Nevertheless, the stability of these important structures during earthquakes has to be carefully evaluated and guaranteed. In the past, earth dams usually designed with pure clay core, but in recent decades they are widely designed and constructed with mixed clay core due to their better performance against vibrations particularly earthquake loadings. This paper evaluates the displacement performance of the Karkheh Large Embankment Dam with mixed- clay core, recently constructed in south-western part of Iran, under earthquake motions and compares the dynamic analyses’ results with those of pure-clay core. In this work, the Karkheh Dam with both mixed and pure clay core is numerically modeled using the FLAC 4.0software. After calibrating the model and completing the static and dynamic analyses under different excitations, belonged to some heavy past earthquakes, the results in terms of the maximum settlements, horizontal displacements of upstream and downstream shells are estimated, compared and discussed. Based on the obtained results, it is noted that the dynamic performance of earth dams with mixed-clay core is more desirable than that of pure-clay core. It is also observed that the seismic settlements of the dam with pure-clay core averagely show an increase of 20 percents compared with that having the mixed-clay core. منبع دانلود JSEG261354307400.pdf

An Investigation on the Behavior of Retaining Structure of Excavation Wall Using Obtained Result from Numerical Modeling and Monitoring Approach. (A Case Study of International "Narges Razavi 2 Hotel", Mashhad) Soheil Ghareh 1 ; Mehdi Saidi2 With the growing population and density in metropolitan areas, higher tendency to live in high-rise buildings, and increasing demand for parking lots, it seems necessary to excavate soil to construct underground spaces. During excavation work, as the height of the wall increases, special care should be taken to the wall stabilization to avoid any consequent damage including extensive property damage or loss of life. Different methods such as performing steel or concrete pile, sheet piling, reciprocal anchorage, diaphragm wall, soil nailing, and soil anchorage can be utilized to stabilize excavation wall. As all of these methods have their own advantages and disadvantages, it is important to know the limitations and differences of each method. Besides providing more work space in the wall, using novel methods of stabilization may lead to considerable savings in cost and time. By examining the behavior of retaining structure and also predicting the value of wall displacement, resulting from existing loads such as adjacent structures of the wall, service loads, and vehicle live load, a big step can be taken to prevent any probable damage. Currently, due to the development of high speed digital computers, finite element method (FEM) can be applied to predict the behavior of retaining structure. In this paper, as a case study, the behavior of retaining structure of excavation wall of Narges Razavi 2 International Hotel, Mashhad, stabilized using steel pile and soil anchorage, has been investigated. For this purpose, the results obtained from finite difference software, FLAC2D, and finite element software, PLAXIS2D, have been compared with those obtained from the monitoring of excavation wall. It was found that there is a good consistency between the results. منبع دانلود JSEG121329597000.pdf

MODELING OF ROCK SLOPES AGAINST FLEXURAL TOPPLING FAILURE IN STATIC AND DYNAMIC CONDITIONS (PHYSICAL, NUMERICAL, AND ANALYTICAL METHODS) Author(s): AMINI M.*, KHOSRAVI M.H., BAHARLO A. Abstract: Flexural toppling is a mode of failure that may occur in a wide range of layered rock strata in both natural and excavated rock slopes. As illustrated in Figure 1, a typical flexural toppling can be occurring in a rock slope when columns of rock are separated by steeply dipping discontinuities and bended forward. منبع: [Hidden Content] دانلود: [Hidden Content] 100620140403.pdf