ces http://www.c-e-s.fr Un site utilisant WordPress Thu, 24 Sep 2015 12:26:02 +0000 en-GB hourly 1 https://wordpress.org/?v=4.0.38 DESIGN OF REINFORCED CONCRETE SPECIMEN INTENDED FOR HYBRID TESTING http://www.c-e-s.fr/blog/2015/07/06/design-of-reinforced-concrete-specimen-intended-for-hybrid-testing/ http://www.c-e-s.fr/blog/2015/07/06/design-of-reinforced-concrete-specimen-intended-for-hybrid-testing/#comments Mon, 06 Jul 2015 20:13:18 +0000 http://www.c-e-s.fr/?p=1065

In the context of a collaborative project financed by ANR including ENS CACHAN, IFSTTAS, CEA, aiming at studying the dynamic behavior of structures reinforced by different technics, CES used its skills to contribute to the conception and atypical design of specimens.

One of the objectives of CEA was to include the presence of soil in the control strategy that is to say soil-structure interaction phenomena thanks to hybrid testing.

Disegno3-Model
Fields
Structural dynamic analyses

Simplified and advanced analyses for designing test specimens.

Non-linear mechanics

Non-linear modeling of steel column anchorages

Finite elements

1D and « full 3D » modeling of test specimens

Seismic analysis

Push-over and transient analyses

Tools developed
DoubleCAD XT

OpenSource CAD software

Link

Cast3M

Cast3M is an OpenSource code developed by CEA

Link

Paraview

Opensource sofware dedicated to the post-processing operations related to computations made with Cast3M

Link

Cluster 32 cores – 64 Gb – CES

CES has developed its own computational tools in order to perform requested analyses

CES’s objectives and contributions

Within the framework of this innovative project, CES had to design steel and reinforced concrete specimens. Despite simple structural components, the testing devices on the shaking table brought about difficulties. That’s why CES performed a sensitivity analysis in order to define the formwork geometry before designing test specimens and detailed drawings.

Partner(s)/ Client(s)
Duration

3 months

Budget

-

Type of project

Design

]]> http://www.c-e-s.fr/blog/2015/07/06/design-of-reinforced-concrete-specimen-intended-for-hybrid-testing/feed/ 0 DESIGN OF A FIRE SAFETY CAR PARK IN TURIN (ITALY) http://www.c-e-s.fr/blog/2015/07/06/design-of-a-fire-safety-car-park-in-turin-italy/ http://www.c-e-s.fr/blog/2015/07/06/design-of-a-fire-safety-car-park-in-turin-italy/#comments Mon, 06 Jul 2015 20:02:12 +0000 http://www.c-e-s.fr/?p=1063

Within the framework of the construction of an underground car park, CES has contributed to predict the different situations resulting from both changes in temperature distribution and fire spread over time.

With over 364 parking spaces, this car park located in Turin, occupies a 9600 square meters surface area on 4 stories.

CES used its experience and expertise to jointly carry out computational fluid mechanics studies with ADVENG, in order to ensure maximum safety in these premises.

CtdFds
Fields
Fire risk assessment

Temperature field with distribution of smoke determined.

Computational fluid mechanics

Velocity field of smoke determined in taking into account ventilation system effects.

Tools developed
FDS-SmokeView

OpenSource software, developed by NIST (National Institute of Standards and Technology) for simulation of fire propagation scenarios in a building. Results allow assessing temperatures and spread of smoke

Link

CES’ objectives and contributions

Within the framework of this project, CES has evaluated the structural effects of different accident scenarios. Jointly working with AVENG, CES had to determine the smoke maps of buildings to assess the efficiency of the ventilation system

Partner(s)/ Client(s)
Duration

1 month

Budget

-

Type of project

Design
Assessment

]]> http://www.c-e-s.fr/blog/2015/07/06/design-of-a-fire-safety-car-park-in-turin-italy/feed/ 0 2013 SMART INTERNATIONAL BENCHMARK http://www.c-e-s.fr/blog/2015/07/06/smart-international-benchmark-2013/ http://www.c-e-s.fr/blog/2015/07/06/smart-international-benchmark-2013/#comments Mon, 06 Jul 2015 19:33:56 +0000 http://www.c-e-s.fr/?p=1061

In order to improve the efficiency of best-estimate seismic assessment methods, CES took part in the 2013 SMART project jointly launched by EDF, CEA and AIEA.

The 2013 SMART project allowed to launch a big seismic testing campaign, carried out by CEA and financed by EDF, with the analysis of a nuclear asymmetric structure.

To advance research, the collected experimental data were subjected to an international Benchmark open to the whole scientific community.

Within the framework of this project, CES used its experience and expertise to provide the analysis of linear and non-linear transient dynamics.

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ImgProjet1
Fields
Structural dynamics

Linear dynamic computations made on modal basis and nonlinear transient analyses

Nonlinear mechanics

Nonlinear modeling of reinforced concrete

Finite elements

Three-dimensional spacial discretization of the specimen (including both concrete and reinforcing steel)

Seismic analysis

Analysis of the structural response under high intensity seismic loading including damage assessment of the specimen (high eigenfrequency shift and inter-story drift)

Probabilistic analyses

Determination of fragility curves considering various failure criteria and seismic indicators

Tools developed
Cast3M

Cast3M is an OpenSource code developed by CEA. Due to its flexibility, CES could integrate its developments into Cast3M in order to make resquested analyses

Paraview

Opensource sofware dedicated to the post-processing operations related to computations made with Cast3M

Link

Cluster 32 chores – 64 Gb – CES

CES has developed its own computational tools in order to perform requested analyses

Gmsh

External meshing software compatible with Cast3M

Link

CES’s objectives and contributions

CES has contributed to the 2013 SMART International Benchmark in actively responding to proposed works. A numerical model of the SMART specimen was developed and allowed performing non-linear dynamic analyses. This project was an opportunity for CES to demonstrate its management of dynamic computations in comparing its results to the ones gained by the teams from all over the world.

Partner(s)/ Client(s)
Duration

1.5 year

Budget

100% financed by CES

Type of project

R&D

]]> http://www.c-e-s.fr/blog/2015/07/06/smart-international-benchmark-2013/feed/ 0 Design of a residential building in Fortaleza (Brazil) http://www.c-e-s.fr/blog/2015/06/29/design-of-a-residential-building-in-fortaleza-brazil/ http://www.c-e-s.fr/blog/2015/06/29/design-of-a-residential-building-in-fortaleza-brazil/#comments Mon, 29 Jun 2015 09:05:17 +0000 http://www.c-e-s.fr/?p=1055

The design of four slender reinforced concrete residential buildings exposed to strong gusts of wind has required a far-reaching study to take important torsional effects into account.

MsjVento
Fields
Structural dynamics

Numerical assessment of the dynamic behavior of a slim structure subjected to wind loading.

Finite elements

Three-dimensional spatial discretization of the building

Seismic analysis

Modal spectral and transient analyses (linear and nonlinear)

Tools developed
FaTAe

Software aimed at designing and assessing reinforced concrete, wooden and steel structures, as well as masonry work.

Types of possible computations: Static analysis, Push-over analysis, Modal spectral analysis, Dynamic analysis, linear and nonlinear transient analysis.

Link

Software CFD

Dedicated sofware for simulating wind effects on structures.

Link

AutoCad

CAD software

Link

Section
CES’ Objectives and contributions

This major project has represented a real challenge for CES’ teams, jointly working with AVENG. Designing the tower, in a difficult environment, has represented a delicate technical study.

Partner(s) /Client(s)
Duration

1 month

Budget

-

Type of project

Implementation

]]> http://www.c-e-s.fr/blog/2015/06/29/design-of-a-residential-building-in-fortaleza-brazil/feed/ 0 Reinforced concrete building in Calabria http://www.c-e-s.fr/blog/2015/03/19/reinforced-concrete-building-in-calabria/ http://www.c-e-s.fr/blog/2015/03/19/reinforced-concrete-building-in-calabria/#comments Thu, 19 Mar 2015 14:41:26 +0000 http://www.c-e-s.fr/?p=1028

A Reinforced concrete building was jointly designed with AVENG within the framework of the construction of an unusual private house.

In this area located in the south of the « toe » of the Italian mainland and subjected to a dozen of earthquakes in the course of the 20th century, more and more numerous inhabitants have chosen to engage exceptional means in the construction projects of residential premises. To comply with safety standards and current regulations, an important work on the design of structures is necessary.

The study of the out of plane behavior of the building was carried out in order to limit torsional effects. As a result, the design of reinforced concrete shear walls has been defined

BudMuri
Fields
Structural dynamics

Spectral modal and transient analyses

Design studies

Design according to EC2 and EC8

Seismic analysis

Push-over analysis

Section
Tools developed
FaTAe

Software aimed at designing and assessing reinforced concrete, wooden and steel structures, as well as masonry work.

Types of possible computations : Static analysis, Push-over analysis, Modal spectral analysis, Dynamic analysis, linear and nonlinear transient analysis.

Link

SismoGis
AutoCad

CAD software (CAD = Computer Aided Design)

Link

CES’ objectives and contributions

The scope of this project lies in the way the stability of the whole structure was ensured, when subjected to torsional loading. In fact, the norms that are applied today hardly deal with this matter. That is why CES has developed several numerical models in order to assess the design of the structure. For this purpose, both linear and nonlinear approaches were used to make the structural assessment of reinforced concrete shear walls

Partner(s)/ Client(s)
Duration

1 month

Budget

Type of project

Design

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