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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Computational Structural Engineering Institute of Korea
Journal Basic Information
Journal DOI :
The Computational Structural Engineering Institute
Editor in Chief :
Volume & Issues
Volume 18, Issue 4 - Dec 2005
Volume 18, Issue 3 - Sep 2005
Volume 18, Issue 2 - Jun 2005
Volume 18, Issue 1 - Mar 2005
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Nonlinear Analysis of Prestressed Concrete Containment Structures Considering Slip Behavior of Tendons
Kwak Hyo-Gyoung ; Kim Jae-Hong ; Kim Sun-Hoon ; Chung Yun-Suk ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 335~345
This paper concentrates on the nonlinear analysis of prestressed concrete (PSC) containment structures. Unlike a commercialized program which adopts the perfect bond assumption between concrete and tendon in the analysis of PSC structures, a numerical algorithm to consider the slip effect, simultaneously with the use of commercialized programs such as DIANA and ABAQUS, is introduced in this paper For bonded tendons, the apparent yield stress of an embedded tendon is determined from the bond slip relationship. And for unbonded tendons, Correction for the strength and stiffness of unbonded internal tendons is achieved on the basis of an iteration scheme derived from the slip behavior of tendon along the entire length. Finally, the developed algorithm is applied to two PSC containment structures of PWR and CANDU to verify its efficiency and applicability in simulating the structural behavior of large complex structures, and the obtained result shows that both containment structures represent the ultimate pressure capacity larger than about 3 times of the design pressure.
A Study on the Hydraulic Stability of Fuel Rod for the Advanced
Fuel Assembly Design
Jeon Sang-Youn ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 347~360
The fuel rod instability can be occurred because of the axial and cross flow due to the flow anomaly and/or flow redistribution in the lower core plate region of the pressurized water reactor. The fuel rod vibration due to the hydraulic instability is one of the root causes of fuel failure. The verification on the fuel rod vibration and instability is needed for the new fuel assembly design to verify the fuel rod instability. In this study, the fuel rod vibration and stability analyses were performed to investigate the effect of the grid height, fuel rod support condition, and span adjustment on the fuel rod vibration characteristics for the advanced
fuel assembly design. Based on the analysis results, the grid height and grid axial elevation of the advanced
fuel assembly design were proposed.
Dynamic Interaction Analysis of Vehicle-Suspension Bridge Considering Flexural and Torsional Behaviors and Shear Deformation Effects
Kim Moon-Young ; Lim Myoung-Hun ; Kwon Soon-Duck ; Kim Ho-Kyung ; Kim Nam-Il ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 361~372
In the previous study(Kim 등, 2004), the finite element method was used for the vortical vibration analysis of suspension bridge with the effects of the shear deformation and the rotary inertia under moving load considering the bridge-vehicle interaction. The purpose of this study is to investigate the effect of an eccentric vehicle and shear deformation. So we firstly performs the eigenvalue analysis for the free vortical and the torsional vibration of suspension bridges using FEM analysis. Next the equations of motion considering interaction between suspension bridges and vehicles/trains are derived using the mode superposition method. And then dynamic analysis was performed using the Newmark method. Finally through the numerical examples, the dynamic responses of bridges are investigated according to the proposed procedure.
A Study on the Dynamic Impact Response Analysis of Cask by Modal Superposition Method
Lee Young-Shin ; Kim Yong-Jae ; Choi Young-Jin ; Kim Wol-Tae ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 373~383
The cask is used to transfer the radioactive material in various fields required to withstand hypothetical accident condition such as 9m drop impact in accordance with the requirement of the domestic requlations and IAEA. So far the impact force has been obtained by the finite element method with complex computational procedure. In this study, the dynamic impact response of the cask body is analyzed using the mode superposition method, and the analysis method is proposed. The results we also validated by comparing with previous experimental results and finite element analysis results. The present method Is simpler than finite element method and can be used to predict the global impact response of cask
Dynamic Formulation Using Finite Element and Its Analysis for Flexible Beam
Yun Seong-Ho ; Eom Ki-Sang ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 385~393
This paper established the dynamic model of a flexible Timoshenko beam capable of geometrical nonlinearities subject to large overall motions by using the finite element method. Equations of motion are derived by using Hamilton principle and are formulated in terms of finite elements in which the nonlinear constraint equations are adjoined to the system using Lagrange multipliers. The Newmark direct integration method and the Newton-Raphson iteration are employed here for the numerical study which is to demonstrate the efficiency of the proposed formulation.
Nonlinear Dynamic Analysis of Space Steel Frames
Kim Seung-Eock ; Cuong Ngo-Huu ; Lee Dong-Ho ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 395~404
This paper presents a reliable numerical procedure for nonlinear time-history analysis of space steel frames subjected to dynamic loads. Geometric nonlinearities of member (P-
) and frame (P-
) are taken into account by the use of stability functions in framed stiffness matrix formulation. The gradual yielding along the member length and over the cross section is included by using a tangent modulus concept and a softening plastic hinge model based on the New-Orbison yield surface. A computer program utilizing the average acceleration method for the integration scheme is developed to numerically solve the equation of motion of framed structure formulated in an incremental form. The results of several numerical examples are compared with those derived from using beam element model of ABAQUS program to illustrate the accuracy and the computational efficiency of the proposed procedure.
A Study on the Buckling Characteristics of Spacer Grids in Pressurized Water Reactor Fuel Assembly
Jeon Sang-Youn ; Lee Young-Shin ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 405~416
This study contains the static buckling tests and static buckling analyses for small size grids and full size grids. The buckling tests and finite element analyses were performed to evaluate the buckling characteristics of the spacer grids in a pressurized water reactor fuel assembly and to evaluate the possibility of the prediction lot the buckling strength of spacer grids. The buckling tests were performed for small size grids and full size grids, and the correlations between buckling strength and the number of straps and the correlations between buckling strength and the number of rows are derived based on the test results. The static buckling analyses were performed to identify the effect of the number of rows and the number of columns on the buckling strength of spacer grid by a finite element method using ANSYS program and the results were compared with the buckling test results.
Flexural Characteristics of Model Composite Deck Fabricated with VARTM
Lee Sung-Woo ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 417~426
Recent days composite bridge dock is gaining attraction due to many advantages such as light weight, high strength, corrosion resistance, and high durability. In this study, composite deck models of hat, box and triangular section type wore fabricated with VARTM Process. For these models, three point flexural tests wore carried out both in strong and weak axis. The experimental results were compared with each other to determine efficient section profile. It has been demonstrated that composite sandwich deck has strong potentials to be used as bridge deck in the new construction and rehabilitation works.
Fabrication, Durability and Structural Characteristics of Composite Bridge Deck of Hollow Section
Lee Sung-Woo ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 427~434
In this study, to develop composite bridge deck of many advantages such as light weight, high strength, corrosion resistance and high durability, profile design, laminate design and finite element analysis were carried out. In the analysis, 5-girder single span bridge with composite deck was considered. Deflection serviceability, failure criteria and web buckling were evaluated. Composite deck of designed profile was fabricated with pultrusion process. The coupon tests were conducted for the fabricated deck and the results were described.
XML-Based Digitalization of Structural Design Sheets for RC Buildings
Jung Jong-Hyun ; Kang Kyung-Soo ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 435~443
This study describes the XML-based digitalization of structural design sheets for RC buildings to exchange on the web. For this purpose, first, the data structure of XML document that represents the structural design skeets, including mathematical expressions and graphics that cannot be easily exchanged on the web, is defined. Then, the presentation of the XML documents on the web is discussed. The prototype that facilitates the web-based exchange of the XML documents we developed and the feasibility of the results of this study is discussed.
Optimal Life-Cycle Cost Design of Steel Box Girders
Shin Yung-Seok ; Park Jang-Ho ; Lee Hyun-Sub ; Ahn Ye-Jun ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 445~452
This paper presents a design method to minimize Life Cycle Cost (LCC) of steel box girders. The LCC considered in this paper includes initial cost, expected life-cycle maintenance cost and repair cost. A load carrying capacity curve is derived from a condition grade curve of steel girders and load tarrying capacity that is measured in safety diagnostic test. And then, optimal design of steel box girders is performed on the basis of load carrying capacity curve. In this paper time and number of times for repair of steel girders are determined based on the calculated load carrying capacity curve. Also, annual costs considering real discount rate are compared and analyzed in various cases. It is concluded that the optimal design of steel box gilders considering LCC by the presented method will lead to more economical and safer girders than conventional design.
Elasto-Plasticity of Granular Micro-Structures
Park Jae-gyun ;
Journal of the Computational Structural Engineering Institute of Korea, volume 18, issue 4, 2005, Pages 453~458
This study deals with elasto-plasticity of granular micro-structures which recovers continuum elasto-plasticity in its counterpart. The theory is based on doublet mechanics that assumes particles of finite size and connecting linear springs, and it makes extensions to plasticity. The result shows that the micro model has one to one relationship with the continuum model in the simplest case. Micro-strain and micro-stress of two dimensional plane stress problem were calculated, which shows the behavior of the specimen and verifies the effectiveness of this model.