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This technical document introduces fluid elements. It covers the differences between "compressible and incompressible fluids" and "viscous and inviscid fluids" over a total of 8 pages. Detailed explanations are provided using diagrams and equations. [Contents] ■ Differences between compressible and incompressible fluids ■ Differences between viscous and inviscid fluids *For more details, please refer to the PDF document or feel free to contact us.

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This technical document introduces a multi-directional cracking model. It includes topics such as "Mechanical behavior of concrete before crack formation and within the crack," "Stress transfer at the crack surface," and "Reinforcement history model," all presented over 15 pages. Detailed explanations are provided using diagrams and formulas. [Contents] ■ IMPLICIT type model ■ Mechanical behavior of concrete before crack formation and within the crack ■ Stress transfer at the crack surface ■ Reinforcement history model ■ References *For more details, please refer to the PDF document or feel free to contact us.

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This technical document introduces eigenvalue analysis. Eigenvalue analysis of structural vibration problems refers to the analysis that calculates the frequencies and deformation modes when a structure undergoes free vibration. These frequencies are called natural frequencies, and when external loads with frequencies close to these natural frequencies are applied, resonance phenomena occur. In real phenomena, structures vibrate at their natural frequencies while being damped during free vibration, but here we will explain free vibration while ignoring damping. 【Contents】 ■ About Eigenvalue Analysis *For more details, please refer to the PDF document or feel free to contact us.*

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This technical document introduces multi-spring elements. It covers topics such as "skeleton curves," "strength and stiffness changes," and "damping constants," presented over a total of 16 pages. Detailed explanations are provided using diagrams. [Contents] ■1. Skeleton Curves ■2. Strength and Stiffness Changes ■3. Damping Constants ■4. Hysteresis Curves ■5. Stress-Strain Relationships ■6. Supplement *For more details, please refer to the PDF document or feel free to contact us.

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This technical document introduces ISCEF fiber elements. Fiber elements are elements that represent cross-sectional shapes as a collection of fibers given physical properties Ei, νi, yi, area Ai, and coordinates (yi, zi). Additionally, since it is possible to define physical properties and nonlinear conditions for each fiber, it is effective for the analysis of RC structures and more. 【Contents】 ■1. Fiber Element Model ■2. Nonlinear Model *For more details, please refer to the PDF document or feel free to contact us.

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This technical document introduces the ISCEF viscous boundary. A viscous boundary is a boundary condition that absorbs energy from reflected waves from structures at the boundary surface of the analysis model. Generally, in ground models, a viscous boundary is set at the bottom surface with the foundation and a viscous boundary is set laterally with the free ground. In ISCEF, by setting the viscous boundary at the interface, subsequent settings are automatically performed as described later. [Contents] ■1. Normal viscous boundary (viscous boundary using dashpot elements) ■2. Viscous boundary based on the principle of virtual work *For more details, please refer to the PDF document or feel free to contact us.

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At Centuri Techno, we undertake analyses that consider the material nonlinearity of both concrete and reinforcing steel, as well as checks using the allowable stress method and limit state design method based on the sectional forces from linear analysis. We represent RC structures by using layered shell elements for concrete and adding a layer of reinforcing steel (embedded rebar) within them. In the layered shell elements, we simulate concrete cracking and compressive failure, while the embedded rebar elements evaluate the yielding of the reinforcing steel. [Features] ■ Analysis considering the material nonlinearity of both concrete and reinforcing steel ■ Allowable stress method using sectional forces from linear analysis ■ Checks using the limit state design method *For more details, please refer to the PDF materials or feel free to contact us.

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Our company, which specializes in commissioned analysis of structures and ground, is currently distributing explanatory materials that introduce information related to "CAE" in an easy-to-understand manner for beginners. In addition to basic knowledge such as benefits, we also introduce FEM, one of the analysis methods, along with images of analysis models. Furthermore, we provide detailed explanations of the features and functions of the structural analysis software "ISCEF," which is specialized for civil engineering structures. [Contents] ■ Basic information on CAE (structural analysis, vibration analysis, etc.) ■ Benefits of introducing CAE (evaluation of large-scale structures, etc.) ■ What is FEM? (with images of analysis model examples) ■ Introduction to the structural analysis software "ISCEF" *For more detailed information, please refer to the [PDF download].

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Our company offers a structural analysis software suitable for civil engineering structures called 'ISCEF'. This software includes options such as seepage flow analysis "ISCEF/SPG" and temperature analysis "ISCEF/Thermal". 【Options】 ■ISCEF/SPG (Saturated-Unsaturated Seepage Flow Analysis Program) You can set water levels, permeability coefficients, and unsaturated seepage characteristics to calculate pressure head, seepage force, and more. It supports both steady-state and unsteady-state analyses and is equipped with dissolution conditions that address various issues such as fluctuating water level boundaries and rainfall boundaries. It is also capable of analyzing large-scale three-dimensional problems. - Analysis method: Steady-state/Unsteady-state analysis - Boundary conditions: Fixed head boundary, seepage point boundary, fluctuating water level boundary, rainfall boundary *For more details, please refer to the PDF materials or feel free to contact us.

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The structural analysis software 'ISCEF' suitable for civil engineering structures, which we handle, is equipped not only with analysis functions but also with various additional features. The additional features include waveform processing functions such as Fourier spectrum, response spectrum, and frequency cut, as well as output functions for M-φ relationships and local safety factor calculation for rock masses, all tailored for various civil engineering structures. 【Additional Features of ISCEF】 ■ Waveform processing functions ■ Local safety factor calculation for rock masses ■ Stress calculation functions for beam elements ■ M-φ relationship output functions ■ Analysis response value extraction functions (MAX, MIN, ABS, etc.) ■ Stress superposition functions *For more details, please refer to the PDF materials or feel free to contact us.

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The structural analysis software "ISCEF" suitable for civil engineering structures that our company handles is equipped with various solvers to efficiently solve large-scale structures, long-duration dynamic analyses, and advanced problems. It also supports multi-core processing, which has a significant effect on large-scale problems. 【ISCEF Solvers】 ■ Iterative method solver (MRTR, B in CR) ■ Direct method skyline solver ■ Direct method sparse solver *For more details, please refer to the PDF materials or feel free to contact us.

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There are two types of methods for modeling the nonlinearity of the ground: the equivalent linear model and the sequential nonlinear model. The structural analysis software 'ISCEF' that we handle is suitable for civil engineering structures and includes, in addition to the equivalent linear method, the sequential nonlinear methods: Hardin-Drnevich model (H-D model), Ramberg-Osgood model (R-O model), and General Hyperbolic Equation model (GHE model). 【Sequential Nonlinear Methods in ISCEF】 ■ Hardin-Drnevich model (H-D model) ■ Ramberg-Osgood model (R-O model) ■ General Hyperbolic Equation model (GHE model) *For more details, please refer to the PDF materials or feel free to contact us.

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For structures that come into direct contact with fluids, such as dam embankments, coupled analysis between the structure and the fluid is necessary. The structural analysis software 'ISCEF' that we handle is suitable for civil engineering structures and includes not only incompressible fluids but also compressible fluids that take propagation speed into account. [Features] - It is possible to model using compressible fluid elements. - Both compressible and incompressible fluid elements can be used for two-dimensional as well as three-dimensional analysis. *For more details, please refer to the PDF materials or feel free to contact us.

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Our structural analysis software 'ISCEF' suitable for civil engineering structures allows for easy configuration of various contact conditions to replicate real phenomena. For example, even in the case of openings like the joints of a dam with shear keys, the conditions for transmitting shear forces can be defined with the flip of a switch. Additionally, it addresses various issues such as models that soften shear strength after delamination and shear failure, and maximum shear evaluation models. 【Features】 ■ Easy configuration of contact conditions ■ Conditions for transmitting shear forces can be defined with the flip of a switch ■ Addresses various issues including models that soften shear strength and maximum shear evaluation models *For more details, please refer to the PDF materials or feel free to contact us.

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Our structural analysis software 'ISCEF' suitable for civil engineering structures allows tracking of concrete crack propagation using a distributed crack model. In addition to the orthogonal fixed model, it also includes a non-orthogonal fixed model. The non-orthogonal fixed model can track tensile and compressive failure considering the nonlinearity of the reinforcement. 【Features】 ■ Various stress-strain softening tables can be set (single linear, two linear, multiple linear) ■ Damping considering the stiffness reduction of crack occurrence elements ■ Decay settings for each material property *For more details, please refer to the PDF document or feel free to contact us.

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Our structural analysis software 'ISCEF' (Aisefu), suitable for civil engineering structures, allows you to set strength constants and arc shapes to determine safety factors and slip displacement amounts. Arc information can be visually created through the interface by setting material properties (compatible with both Cφ method and Ab method) and calculation conditions (with or without water level). Additionally, you can set not only specified arcs but also arbitrary arcs, allowing you to determine the maximum slip arc. It supports both the Newmark method and the Watanabe-Baba method, and simultaneous calculations are possible. 【Features】 ■ Ability to set strength constants and arc shapes to determine safety factors and slip displacement amounts (arc shapes can be specified arcs as well as arbitrary arcs) ■ Compatible with both the Newmark method and the Watanabe-Baba method ■ Simultaneous calculations possible *For more details, please refer to the PDF document or feel free to contact us.

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Our structural analysis software 'ISCEF' suitable for civil engineering structures offers an intuitive and user-friendly interface. You can intuitively set up job management for analysis, load settings, nonlinear material tables, and fluid-structure interaction mass calculation functions directly on the interface. Additionally, the viscous boundaries, which are essential during dynamic analysis, can be automatically created with simple settings. The software is equipped with unique features particularly suited for dam and ground fields. 【Features】 ■ Load setting functions (uplift pressure, Westergaard, Zanger, etc.) ■ Nonlinear material table input ■ Viscous boundary surface creation function based on the virtual work principle considering notch forces *For more details, please refer to the PDF materials or feel free to contact us.

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We will introduce a case study on the use of the structural analysis software 'ISCEF', which is suitable for civil engineering structures. In large-scale mass concrete construction, such as dams, temperature stress due to the hydration heat of cement and temperature cracking become significant issues. To achieve higher quality construction, factors such as lift schedules and curing conditions have a major impact, and these construction conditions also reflect on the project timeline and costs, necessitating the need for more optimal construction plans. Our company proposes appropriate analysis approaches and methods, taking into account the characteristics of the analysis target. 【Temperature Analysis】 ■ Analysis Settings ■ Temperature Conditions ■ Restraint Matrix Method *For more details, please refer to the PDF materials or feel free to contact us.

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Our company offers a "Contract Analysis Service for Structures and Ground" using the finite element method. We support analyses using our proprietary software "ISCEF," as well as "Abaqus" and "Nastran." We have a wealth of experience with clients including government agencies, independent administrative institutions, educational institutions, general contractors, and civil engineering consultants. 【Functions of the Structural Analysis Software "ISCEF"】 - 3D analysis / 2D analysis / frame analysis - Static analysis / dynamic analysis / eigenvalue analysis - Time history response analysis / frequency response analysis - Linear analysis / nonlinear analysis (concrete [unreinforced, reinforced], steel materials, ground, contact problems) - Safety evaluation support functions (stress calculation, buckling calculation, stability calculation) 【Achievements with Abaqus】 - Elasto-plastic large deformation analysis of steel girders - Seismic evaluation of road signs - Tunnel excavation analysis - Load capacity evaluation of grout joints in monopiles - Collision simulation of steel columns ★ You can view case studies of civil structures analyzed using "ISCEF" by downloading the PDF. Additionally, many technical materials for CAE engineers are also available!

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We will introduce the case studies of the structural analysis software 'ISCEF,' which is optimal for civil engineering structures. In large-scale mass concrete construction, such as dams, temperature stress due to cement hydration heat and temperature cracking become significant issues. To achieve higher quality construction, factors such as lift schedules and curing conditions have a substantial impact, and these construction conditions also reflect on project duration and costs, necessitating more optimal construction plans. Our company proposes appropriate analysis approaches and methods, taking into account the characteristics of the analysis target. 【Temperature Analysis】 ■ Analysis Settings ■ Temperature Conditions ■ Restraint Matrix Method *For more details, please refer to the PDF materials or feel free to contact us.

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We would like to introduce the case studies of the structural analysis software 'ISCEF', which is optimal for civil engineering structures. In tunnel design, which has been based on empirical engineering, there is a growing demand for deeper investigations through numerical analysis. Our company proposes the most suitable analysis methods according to construction conditions such as excavation and support structures. Furthermore, by reproducing the nonlinear characteristics of structural elements (beams, rods, springs, etc.) necessary for modeling not only the ground but also the structures, we can achieve analyses with enhanced reproducibility. 【Tunnel Analysis】 ■ Initial Earth Pressure Analysis - Pre-excavation earth pressure stress - Post-excavation stress distribution ■ Construction - Construction model - Post-construction stress distribution *For more details, please refer to the PDF materials or feel free to contact us.

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We would like to introduce a case study on the use of the structural analysis software 'ISCEF', which is suitable for civil engineering structures. The gatepost is the part that serves as the pillar for the gate and the superstructure. If the gatepost itself is damaged, it will become impossible to open and close the gate, leading to an inability to adjust the water level, which in the worst-case scenario could result in the collapse of the dam. Therefore, improvements in seismic resistance are required for this important related structure of the dam. Our company undertakes tasks such as creating models of gateposts (M-Φ model, fiber model), conducting capacity analysis using the horizontal load-bearing method, and performing dynamic analysis. 【Gatepost Analysis】 ■ Eigenvalue Analysis ■ Static and Dynamic Analysis *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce a case study on the use of the structural analysis software 'ISCEF' suitable for civil structures. As an accessory to dams, gates play a significant role in ensuring the safety of downstream areas. Therefore, gates must be designed to withstand major earthquakes without failure, and finite element analysis is an effective method for verifying this. Our company undertakes a series of tasks related to gate analysis, including model creation, analysis, plasticity checks, and buckling checks. [Gate Analysis] ■ Eigenvalue Analysis ■ Static and Dynamic Analysis ■ Plasticity and Buckling Checks *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the application examples of the structural analysis software 'ISCEF' suitable for civil engineering structures. In concrete structures such as gravity dams, it is necessary to simulate crack propagation, reproduce the movement of joint connections, and conduct analyses considering propagation speed by modeling the reservoir as a compressible fluid. To understand the vibration characteristics of the entire dam, we propose optimal analysis procedures and methods, taking into account the characteristics of the analysis targets, including "actual eigenvalue analysis," "static analysis," and "time history response analysis." [Gravity Dam Analysis] ■ Actual Eigenvalue Analysis ■ Static Analysis ■ Time History Response Analysis *For more details, please refer to the PDF materials or feel free to contact us.

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"ISCEF" is a general-purpose structural analysis code developed independently by our company using the finite element method. It excels in the analysis of ground, rock, and related structures due to its dynamic analysis coupling capabilities for structures and fluids, as well as its crack tracking functionality for concrete structures. However, it also demonstrates sufficient functionality in general structural analysis due to its high versatility (including two-dimensional and three-dimensional problems, static and dynamic problems, linear and nonlinear problems, etc.). We have a proven track record not only for the main dam but also for various ancillary structures such as steel gates, dam intake towers, and gate pillars. Leveraging the strengths of our in-house development, we can also accommodate detailed customization based on your requests. Additionally, we offer contracted analysis services using the same software. *For more details, please refer to the PDF document or feel free to contact us.

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