Using the inverse identification of parameters of a nonlinear concrete material model for analysis of RC structural element

2019 ◽  
Author(s):  
Petr Král ◽  
Petr Hradil ◽  
Jiří Kala ◽  
Zdeněk Kala ◽  
Filip Hokeš
Keyword(s):  
Material Model ◽  
Inverse Identification ◽  
Structural Element ◽  
Concrete Material ◽  
Identification Of Parameters

Efficient Finite Element for Evaluation of Strain Concentrations in Concrete Coated Pipelines

2008 ◽  
Author(s):  
Svein Sævik ◽  
Martin Storheim ◽  
Erik Levold
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Sandwich Beam ◽  
Beam Theory ◽  
Material Model ◽  
Body Motion ◽  
Theoretical Formulation ◽  
Concrete Material ◽  
Non Linear ◽  
Full Scale Tests

MARINTEK has developed software for detailed analysis of pipelines during installation and operation. As part of the software development a new coating finite element was developed in cooperation with StatoilHydro enabling efficient analysis of field joint strain concentrations of long concrete coated pipeline sections. The element was formulated based on sandwich beam theory and application of the Principle of Potential Energy. Large deformations and non-linear geometry effects were handled by a Co-rotated “ghost” reference description where elimination of rigid body motion was taken care of by referring to relative displacements in the strain energy term. The non-linearity related to shear interaction and concrete material behaviour was handled by applying non-linear springs and a purpose made concrete material model. The paper describes the theoretical formulation and numerical studies carried out to verify the model. The numerical study included comparison between model and full-scale tests as well as between model and other commercial software. At last a 3000 m long pipeline was analysed to demonstrate the strain concentration behaviour of a concrete coated pipeline exposed to high temperature snaking on the seabed.

scholarly journals Optimization-Based Inverse Identification of the Parameters of a Concrete Cap Material Model

2017 ◽  
Vol 245 ◽  
pp. 032078 ◽  
Author(s):  
Petr Král ◽  
Filip Hokeš ◽  
Martin Hušek ◽  
Jiří Kala ◽  
Petr Hradil
Keyword(s):  
Material Model ◽  
Inverse Identification

Implementation of the Nonlocal Microplane Concrete Model Within an Explicit Dynamic Finite Element Program

1992 ◽  
Vol 45 (3S) ◽  
pp. S132-S139 ◽  
Author(s):  
William F. Cofer
Keyword(s):  
Finite Element ◽  
Strain Tensor ◽  
Material Model ◽  
Material Behavior ◽  
Concrete Material ◽  
Finite Element Program ◽  
Dynamic Finite Element ◽  
Weighted Integral ◽  
Element Program ◽  
Explicit Dynamic

The microplane concrete material model is based upon assumptions regarding the behavior of the material components. At any point, the response to the strain tensor on arbitrarily oriented surfaces is considered. Simple, softening stress-strain relationships are assumed in directions perpendicular and parallel to the surfaces. The macroscopic material behavior is then composed of the sum of the effects. The implementation of this model into the explicit, nonlinear, dynamic finite element program, DYNA3D, is described. To avoid the spurious mesh sensitivity that accompanies material failure, a weighted integral strain averaging approach is used to ensure that softening is nonlocal. This method is shown to be effective for limiting the failure zone in a concrete rod subjected to an impulse loading.

Dynamic Analysis of Prestressed Concrete Material Beams

2011 ◽  
Vol 48-49 ◽  
pp. 443-447 ◽  
Author(s):  
Li Chen ◽  
Heng Bo Xiang ◽  
Yong Zhang
Keyword(s):  
Dynamic Analysis ◽  
Crack Resistance ◽  
Prestressed Concrete ◽  
Analytical Method ◽  
Concrete Beams ◽  
Material Model ◽  
Sensitive Material ◽  
Concrete Material ◽  
Single Degree Of Freedom ◽  
Single Degree

Prestressed concrete material structures have the properties of higher crack resistance, higher degree of solidity and lighter weight. A new analytical method is proposed to investigate the dynamic deflection responses of the partially prestressed concrete beams subjected to blast loads. The new method uses an equivalent single degree of freedom system, which combines an elasto/viscoplastic rate-sensitive material model with the proposed static layered section approach. The analytical results agree well with the test data.

A strain-rate-dependent concrete material model for ADINA

1997 ◽  
Vol 64 (5-6) ◽  
pp. 1053-1067 ◽  
Author(s):  
J.W. Tedesco ◽  
J.C. Powell ◽  
C.Allen Ross ◽  
M.L. Hughes
Keyword(s):  
Strain Rate ◽  
Material Model ◽  
Concrete Material ◽  
Rate Dependent

Mechanical Properties Analysis of CFRP Pre-Stressed Section Continuous Thin-Walled Box Girder Bridge Models 22

2014 ◽  
Vol 624 ◽  
pp. 592-595
Author(s):  
Xin Zhong Wang ◽  
Chuan Xi Li
Keyword(s):  
Prestressed Concrete ◽  
Material Model ◽  
Prestress Loss ◽  
Box Girder ◽  
Concrete Material ◽  
Bridge Model ◽  
Change Trend ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Bridge Models

An externally pre-stressed continuous box girder bridge model is designed according to loading features of the continuous beam. The CFRP bars and steel strands are used to make two models for externally pre-stressed reinforcements Analysis of the two models under three different load stiffness and loss of prestress, through calculation and analysis, found that two kinds of prestressed concrete material model under three load deflection basic same, also almost the same change trend, prestressed RMS model than model 1, 2 but with the increase of load model 2 prestress loss is big. Analysis results of CFRP materials and application to provide the reference in the bridge.

Numerical Simulation of Aircraft over Run Arresting System

2013 ◽  
Vol 787 ◽  
pp. 485-489
Author(s):  
Fei Xu ◽  
Ze Tan ◽  
Ya Jie Shi
Keyword(s):  
Numerical Simulation ◽  
Fem Simulation ◽  
Material Model ◽  
Federal Aviation Administration ◽  
Simulation Method ◽  
Thickness Effect ◽  
Foam Concrete ◽  
Fem Model ◽  
Concrete Material ◽  
Static Compression

Engineered Material Arresting System (EMAS) is the specified equipment used to prevent aircraft from overrunning. Based on static compression and impact tests of the foam concrete, material model and parameters in the FEM simulation are determined. Then numerical simulations are performed on FAA(Federal Aviation Administration) aircraft arresting tests. The simplified aircraft arresting FEM model and corresponding simulation method are verified. The thickness effect of the arresting bed is studied.

scholarly journals Kinetic Energy Penetrator (KEP) impact on confined concrete

2021 ◽  
Vol 250 ◽  
pp. 06015
Author(s):  
Hakim Abdulhamid ◽  
Kevin Delabre ◽  
Fabien Plassard ◽  
Pierre Héreil ◽  
Jérôme Mespoulet ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Impact Test ◽  
Material Model ◽  
Confined Concrete ◽  
Concrete Material ◽  
Test Configuration ◽  
Infrastructure Protection ◽  
Robust Approach ◽  
Simulation Results ◽  
Prediction Capability

Understanding concrete response facing warheads threats is important for both the design of strategic infrastructure protection and the prediction of warhead performances. This ongoing study aims at building a robust approach for the characterisation of concrete behaviour under ballistic impact of Kinetic Energy Penetrator (KEP). A set of tests has been developed and performed to fit the main parameters of the Holmquist Johnson Cook Concrete material model. Highly instrumented tests are conducted to improve the model prediction capability and to identify its limits. After a brief description of the test configuration, the paper focuses on the analysis of an impact test and presents preliminary simulation results.

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