جستجو در تالارهای گفتگو
در حال نمایش نتایج برای برچسب های 'finite element'.
10 نتیجه پیدا شد
-
Three-dimensional finite element analysis for soil slopes stabilization using piles
admin پاسخی ارسال کرد برای یک موضوع در مقالات تخصصی گرایش مهندسی ژئوتکنیک
Three-dimensional finite element analysis for soil slopes stabilization using piles I-Hsuan Ho ABSTRACT This paper presents the analytical methods of slope-stabilising piles using the three-dimensional (3-D) finite element (FE) analysis with the strength reduction method (SRM). This 3-D FE model is employed to overcome the limitations observed in two-dimensional (2-D) FE analysis. The solutions obtained from 3-D FE analyses are verified to be less conservative in this paper. The 3-D analysis is considered to be of particular importance to pile-slope problems. The soil that flows between piles cannot be taken account properly in the 2-D FE analysis. The method adopted in this paper can avoid the assumption of soil movement and the pressure distribution along the piles subjected to soil movement. The numerical analysis employs the Mohr–Coulomb failure criterion with the strength reduction technique for soil and an elastic member for piles. The spacing effect of the pile is considered in the 3- D model, the S/D (S: centre to centre, ? diameter of pile) ratio, equal to 4.0, is found to be equivalent to the single pile stabilisation. The middle portion of the slope is identified as the optimal location to place the piles. The proper length of the pile, which can be used to stabilise the slope, is also examined using 3-D FE analyses. It is concluded that L/H greater or equal 0.70 is recommended (L: pile length, H: slope height). The numerical analyses are conducted based on a coupled analysis, which simultaneously considers both the slope stability and the pile response. The failure mechanisms of the pile-slope system subjected to the pile locations, pile head conditions and pile length are each discussed. The contact pressure, shear force and moment along the piles are presented to illustrate the pile stabilising mechanism herein. منبع @Civilbest_تحلیل_المان_محدود_شیب.pdf-
- finite element
- soil
-
(و 3 مورد دیگر)
برچسب زده شده با :
-
FINITE ELEMENT BASED DESIGN PROCEDURES FOR MSE/SOIL-NAIL HYBRID RETAINING WALL SYSTEMS ABDULRAHMAN ALHABSHI Texas Tech University December, 2006 رساله دکتری مرتبط با نیلینگ دانشگاه تگزاس منبع @civilbest تز دکتری نیلینگ-تگزاس.pdf
-
- finite element
- retaining wall
- (و 6 مورد دیگر)
-
جزوه اجزاء محدود - دکتر مهدی اسفندی سرافزار
admin پاسخی ارسال کرد برای یک موضوع در دانلود جزوات دوره های تحصیلات تکمیلی مهندسی عمران
جزوه اجزاء محدود - دکتر مهدی اسفندی سرافزار شامل 4 فصل به شرح زیر : فصل اول : دانلود مقدمه فصل دوم : دانلود المان میله ای فصل سوم : دانلود المان تیر فصل چهارم : دانلود المانهای صفحه ای و فضایی - حالت دوبعدی و سه بعدی منبع از پیوست هم دانلود امکانپذیر است المان_میله_ای.pdf مقدمه.pdf 2D___3D.pdf ch2.pdf-
- المانهای دوبعدی
- المان تیر
- (و 6 مورد دیگر)
-
نمونه سوال امتحانی روش اجزاء محدود - دکتر وحید خوانساری - دانشگاه صنعتی شریف
admin پاسخی ارسال کرد برای یک موضوع در سوالات دروس مختلف دوره های کارشناسی ارشد و دکتری عمران
نمونه سوال امتحانی روش اجزاء محدود - دکتر وحید خوانساری - دانشگاه صنعتی شریف 4 سری نمونه سوال امتحانی روش اجزاء محدود دکتر وحید خوانساری با پاسخ تشریحی (دانشگاه صنعتی شریف) فایل پی دی اف دستنویس در 51 صفحه به نقل از کانال تلگرام civilca دانلود از پیوست اجزاء محدود شریف با پاسخ.part3.rar اجزاء محدود شریف با پاسخ.part2.rar اجزاء محدود شریف با پاسخ.part1.rar-
- وحید خوانساری
- روش اجزاء محدود
- (و 5 مورد دیگر)
-
جزوه اجزاء محدود - دکتر علی اکبر گل افشانی - دانشگاه صنعتی شریف
admin پاسخی ارسال کرد برای یک موضوع در دانلود جزوات دوره های تحصیلات تکمیلی مهندسی عمران
جزوه اجزاء محدود مدرس : مرحوم دکتر علی اکبر گل افشانی مدرس دانشکده عمران دانشگاه صنعتی شریف فایل پی دی اف دستنویس در 202 صفحه گرد آوری : محمدرضا مینوپور به نقل از کانال تلگرام civilca دانلود از پیوست Finite Element Dr Ali Akbar Golafshani @EngBook.rar-
- اجزا محدود
- جزوه اجزا محدود
- (و 6 مورد دیگر)
-
جزوه درس اجزاء محدود خطی - دکتر وحید لطفی - دانشگاه امیرکبیر
admin پاسخی ارسال کرد برای یک موضوع در دانلود جزوات دوره های تحصیلات تکمیلی مهندسی عمران
جزوه درس اجزاء محدود خطی - دکتر وحید لطفی - دانشگاه امیرکبیر جزوه به صورت دستنویس در 287 صفحه و فرمت پی دی اف میباشد که توسط حمید کاظم دانشجوی دکترای سازه از کلاس درس دکتر لطفی نوتبرداری شده است. به نقل از کانال تلگرام civilca دانلود از پیوست ajza mahdood lotfi.part8.rar ajza mahdood lotfi.part7.rar ajza mahdood lotfi.part6.rar ajza mahdood lotfi.part5.rar ajza mahdood lotfi.part4.rar ajza mahdood lotfi.part3.rar ajza mahdood lotfi.part2.rar ajza mahdood lotfi.part1.rar -
Hysteretic Analysis of Steel Plate Shear Walls (SPSWs) and A Modified Strip Model for SPSWs
admin پاسخی ارسال کرد برای یک موضوع در مقالات تخصصی گرایش سازه
Hysteretic Analysis of Steel Plate Shear Walls (SPSWs) and A Modified Strip Model for SPSWs Lanhui Guo1,*, Ran Li1,2, Sumei Zhang1 and Guirong Yan3 1School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China 2China Academy of Building Research, Beijing 100013, China 3School of Engineering, University of Western Sydney, Penrith, NSW 1797, Australia (Received: 7 April 2010; Received revised form: 14 February 2012; Accepted: 16 February 2012) Abstract: Steel plate shear walls (SPSWs) have become more and more popular in recent years because of their potential huge energy dissipation capacity and ductility under lateral loads. Due to their low cost and fast construction, SPSWs have potential application in practice. The finite element software ANSYS applied to the analysis of the hysteretic behavior of SPSWs is described in this paper first. It was found that compressive stress existed in SPSWs and the effects became more evident with decreasing height-to-thickness ratio. This was validated by comparing theoretical and experimental test results. Secondly, based on the analytical results, a modified strip model is proposed. In the modified model, the compressive effects in the panel were taken into account and it was then found that the load-carrying capacity and the energy dissipation capacity agreed well with the already carefully validated experimental results. Key words: finite element (FE), steel plate shear wall (SPSW), hysteretic behavior, strip model, energy dissipation capacity. 1369-4332.15.10.1751.pdf-
- finite element
- FE
-
(و 5 مورد دیگر)
برچسب زده شده با :
-
The Impact of Horizontal Drainage on Persistent Leakage of Non-Homogeneous Soil Dam Body
admin پاسخی ارسال کرد برای یک موضوع در مقالات تخصصی گرایش مهندسی ژئوتکنیک
The Impact of Horizontal Drainage on Persistent Leakage of Non-Homogeneous Soil Dam Body Original Article, D66 Imani O, Merufinia E, Siosemarde M. J. Civil Eng. Urban. 4(4): 435-439. 2014 ABSTRACT: The leaking water flow from the soil dam body lead to transport of its materials that this issue causes internal corrosion and create piping phenomenon in the dam body. To avoid causing this phenomenon, the drainage plan in the downstream of the dam body is necessary. In this paper, the flow leakage of Jaghnab soil dam by using the seep w software based on finite element method have been calculated and the effect of horizontal drainage dimensions on the amount of leakage flow from the dam body has been investigated and evaluated. The result shows that in the non-homogeneous dam, by increasing the length and the thickness of horizontal drainage, the amount of leakage flow increases too. But the effect of the horizontal drainage length in increasing of leakage flow compared to its thickness is significant. In addition, in the dam shell dissimilar condition when kx>ky, the effect of length and thickness parameters of horizontal drainage for the discharge of the drainage water is reduced. Keywords: Horizontal Drainage, Non-homogeneous Dam, Leakage Flow, Finite Element منبع: [Hidden Content] دانلود: [Hidden Content].,%204%20(4)%20435-439,%202014.pdf J. Civil Eng. Urban., 4 (4) 435-439, 2014.pdf-
- Horizontal Drainage
- Non-homogeneous Dam
-
(و 2 مورد دیگر)
برچسب زده شده با :
-
Heave Behavior of Granular Pile Anchor-Foundation (GPA-Foundation) System in Expansive Soil
admin پاسخی ارسال کرد برای یک موضوع در مقالات تخصصی گرایش مهندسی ژئوتکنیک
Heave Behavior of Granular Pile Anchor-Foundation (GPA-Foundation) System in Expansive Soil Original Article, D33 Ibrahim S.F., Aljorany A.N. and Aladly A.I. J. Civil Eng. Urban. 4(3): 213-222. 2014 ABSTRACT: Granular Pile Anchor (GPA) is one of the innovative foundation techniques, devised for mitigating heave of footing resulting from the expansive soils. This research attempts to study the heave behavior of (GPA-Foundation System) in expansive soil. Laboratory tests have been conducted on an experimental model in addition to a series of numerical modelling and analysis using the finite element package PLAXIS software. The effects of different parameters, such as (GPA)length (L) and diameter (D), footing diameter (Df), expansive clay layer thickness (H) and presence of non-expansive clay are studied. The results proved the efficiency of GPA in reducing the heave of expansive soil and showed that the heave can be reduced with increasing length and diameter of GPA. The heave of (GPA-Foundation System) is controlled by three independent variables these are (L/D) ratio, (L/H) ratio and (Df/D) ratio. The heave can be reduced by up to (38 %) when (GPA) is embedded in expansive soil layer at (L/H=1) and reduced by about (90 %) when GPA is embedded in expansive soil and extended to non-expansive clay (stable zone) at (L/H=2) at the same diameter of GPA and footing. An equation (mathematical mode1) was obtained by using the computer package (SPSS 17.0) for statistical analysis based on the results of finite element analysis relating the maximum heave of (GPA-Foundation System) as a function of the above mentioned three independent variables with coefficient of regression of (R2 = 92.3 %). Keywords: Expansive Soil; Sand; Heave; Granular Pile Anchor (GPA); Foundation; PLAXIS; Finite Element. منبع: [Hidden Content] دانلود: [Hidden Content].,%204%20(3)%20213-222,%202014.pdf J. Civil Eng. Urban., 4 (3) 213-222, 2014.pdf-
- PLAXIS
- Foundation
-
(و 6 مورد دیگر)
برچسب زده شده با :
-
Determination of Energy Dissipation in Stepped Spillways Using Finite Element and Finite Volume Methods
admin پاسخی ارسال کرد برای یک موضوع در مقالات تخصصی گرایش مهندسی آب
Determination of Energy Dissipation in Stepped Spillways Using Finite Element and Finite Volume Methods Original Article, C24 Shoja F, Nikpour M.R, Sadeghi H. Journal. Civil Eng. Urban. 3(4):150-155. 2013 ABSTRACT:Accurate and suitable design of Spillways as major parts of dams is very important in the stability and safety of dams. In this study, flow over stepped spillway was simulated in 2D by solving poisson functions of stream and pressure in Finite Element method and with analyzing k-ε turbulence and volume of fluid models in Finite Volume technique. Also a comparison was done between the results of numerical models and measured values in order to investigate the accuracy of the models in calculation of energy dissipation. The relative error percent average of energy dissipation calculation using Finite Element and Finite Volume approaches was achieved 2.85% and 1.26%, respectively. Results showed Finite Volume approach could be employed slightly better than Finite Element method in modelling flow hydraulic over stepped spillway. Keywords: Finite Element, Finite Volume, Stepped Spillway, Turbulence Model, Volume of Fluid Model منبع: [Hidden Content] دانلود: [Hidden Content].,24-150-155.pdf J. Civil Eng. Urban.,24-150-155.pdf-
- Finite Element
- Finite Volume
-
(و 3 مورد دیگر)
برچسب زده شده با :