scholarly journals Structural Safety Evaluation of Marine Loading Arm Using Finite Element Analysis

2013 ◽  
Vol 27 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Chang Yong Song ◽  
Ha Young Choi ◽  
Seung Hwan Shim
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Safety Evaluation ◽  
Structural Safety ◽  
Element Analysis

scholarly journals Safety Evaluation of Hyperbolic Arch Aqueduct Using Three-Dimensional Laser Scanning and Finite Element Analysis

2020 ◽  
Vol 143 ◽  
pp. 01001
Author(s):  
Chengfa Deng ◽  
Chang Xu ◽  
Qi Xie ◽  
Qiang Peng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Safety Evaluation ◽  
Scientific Basis ◽  
Structural Safety ◽  
Original Design ◽  
Element Analysis ◽  
Design Data

The safety evaluation of the aqueduct in many years of operation is often performed to determine the structural operational behaviour so as to provide a scientific basis for further reinforcement or reconstruction. The missing of the original design data due to the long construction period provides great challenging in the structural safety evaluation of the aqueduct. Taking a hyperbolic arch aqueduct in China as an example, we first rebuilt the aqueduct model using the three-dimensional (3D) point cloud from the three-dimensional laser scanning technology. Coupled with the on-site safety inspection, the 3D finite element analysis was then performed to learn the stress performance of the aqueduct body and its supporting structures, so as to achieve the purpose of safety evaluation of aqueduct structure in a whole.

Modification for Fatigue Curves Based on Component Reliability

2012 ◽  
Vol 590 ◽  
pp. 116-121
Author(s):  
Li Juan Cao ◽  
Shou Ju Li ◽  
Yi Jin Shangguan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Safety Evaluation ◽  
Evaluation Procedure ◽  
Element Analysis ◽  
Component Reliability ◽  
The Relationship

Based on component reliability and scatter factors of material, a new procedure is proposed to modify fatigue curves. The scatter characteristics of fatigue life and strength are investigated. The relationship between modified S-N curves and scatter factors of material is presented. The safety evaluation procedure for fatigue damage based on finite element analysis is performed.

Postliquefaction Deformation of Embankments and Effects on Restraining Piles

1998 ◽  
Vol 1633 (1) ◽  
pp. 19-25
Author(s):  
W.D. Liam Finn
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Residual Strength ◽  
Prestressed Concrete ◽  
Large Strain ◽  
Limit Equilibrium ◽  
Safety Evaluation ◽  
Equilibrium Analysis ◽  
Element Analysis ◽  
Seismic Safety

There are three levels of analysis for assessing the postliquefaction stability of embankments: limit equilibrium analysis using residual strength, Newmark sliding block analysis using residual strength, and finite element large strain displacement analysis. The first two types are well known and often used. In recent years, finite element analysis has been used increasingly for important projects involving life safety and large remediation costs. The application of finite element analysis is illustrated by two case histories—failure of a river protection dike in Japan, and the seismic safety evaluation and subsequent remediation of Sardis Dam in Mississippi. The latter example is particularly relevant to pile-supported abutments because the upstream slope of the dam was nailed to a stable foundation layer using prestressed concrete piles. The determination of the static and dynamic moments and shears in these piles would not have been possible without the finite element analysis. A crucial problem affecting the reliability of all methods of analysis is determining the appropriate value for the residual strength.

Nonlinear Finite Element Analysis of Shearwalls with Various Types of Openings

2011 ◽  
Vol 194-196 ◽  
pp. 1900-1903
Author(s):  
Baek Il Bae ◽  
Hyun Ki Choi ◽  
Chang Sik Choi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Coupling Effect ◽  
Shear Walls ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Structural Safety ◽  
Structural Walls ◽  
Element Analysis ◽  
Wall Area

The installation of new opening is necessary for remodeling project, house merging type. Current structural design code cannot provide the deterministic way for designing the shear walls with openings. So many engineers prefer to retrofit the perforated wall area for the structural safety. For the safe design of retroftitting, for the perforated structural walls, we carried out nonlinear finite element analysis to find the coupling effect of remaing walls. Specifically, many types of shapes were considered and various area of rectangular openings were analyzed. For the effective retrofitting, door shape and such area about 20% of wall is appropriate for retrofitting of reinforced concrete shearwalls.

scholarly journals Stochastic Finite Element Analysis of Composite Structures with Partially Restrained Connections under Earthquake Loads

2020 ◽  
Vol 9 (12) ◽  
pp. 147-152
Author(s):  
Özlem Çavdar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Structures ◽  
Structural Safety ◽  
Stochastic Dynamic ◽  
Stochastic Finite Element ◽  
Element Analysis ◽  
Analysis And Design ◽  
Stochastic Finite Element Analysis ◽  
Partially Restrained

The stochastic analysis of composite structures with partially restrained (PR) connections under seismic loads present some interesting and challenging issues to practicing engineers. This paper proposes an efficient, robust, and accurate method for stochastic finite element analysis of concrete–steel composite structures allowing for PR connections. These are followed by suitable numerical example which indicates that employment of such a stochastic finite element analysis. The Kocaeli earthquake in 1999 is considered as a ground motion. The connections parameters and material properties are random variables. It is essential to properly consider the PR connections in the stochastic dynamic analysis and design of the steel-concrete composite structures since design forces change significantly. The assumption that the connections are rigid, which is routinely used in the application, is not proper. The effect of the variability connection stiffness on the composite structures responses is sufficiently important for consideration in structural safety.

Nonlinear finite element analysis for structural assessment of existing bridges: network manager experiences

2021 ◽  
Author(s):  
Johan de Boon ◽  
Marco A. Roosen ◽  
Dick G. Schaafsma ◽  
Max A. N. Hendriks
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Public Works ◽  
Sensitivity Analyses ◽  
Structural Safety ◽  
Element Analysis ◽  
Bridge Structures ◽  
Existing Bridges

<p>The Dutch Directorate-General for Public Works and Water Management (Rijkswaterstaat) is assessing its bridges as a part of the major renovation and replacement task of bridge-structures in the Netherlands. For assessments it appears that calculations show that an increasing number of existing bridges no longer comply with current assessment standards or are becoming restricted in their functionality. Complete renovation is costly, results in disruption of traffic, and is not sustainable. The Eurocode permits to demonstrate sufficient safety using a nonlinear finite element analysis (NLFEA). NLFEA offers a possibility to demonstrate additional structural safety of the existing bridge-structures.</p><p>The challenge is to gain confidence that the approach gives reliable results for the structural safety of the considered bridge. Moreover, experience learns that NLFEA demands many choices to be made by Rijkswaterstaat as a client and will not always lead to unambiguous results. These choices concern modelling aspects, applied safety format, load positions, and the required sensitivity analyses. Another question is what conclusions, based on the obtained results of this analysis, can be drawn for similar structures.</p><p>This paper shows how Rijkswaterstaat has dealt with these challenges with case 'Peddemors' and what lessons are learned, all from the viewpoint of a client.</p>

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