concrete

Dear Colleagues,

with this message, I would like to advertise 2 post-doctoral research positions at the intersection of electrochemistry and mechanics of materials in my lab at Northwestern University. The two post-doctoral projects will specifically focus on the influence of electrodepositions on the structure, properties, and behavior of soils (project 1) and concrete (project 2).

Bridge failures underscore the importance of rigorous material testing. The collapse of the incomplete pedestrian bridge at Florida International University on March 2018 is an example where design errors led to growing cracks as described by OSHA.

Although material failure is not the sole reason for bridge failures, it is a crucial step for selecting the right materials, bridge design analysis, and construction testing.

Concrete is one of the most widely used materials around the world. The construction industry is often involved in a wide array of testing which requires a variety of testing equipment. In addition to simple compression testing, testing standards such as ASTM C39, ASTM C109, ASTM C469, ASTM C1609 are among the test methods that can be followed to measure the mechanical properties of a concrete specimen. This blog post covers the mechanical testing of concrete in lab environments, its automation, and ways of achieving it.

Mechanical Testing of Concrete

In contrast to many numerical methods, the eigenerosion approach yields a convenient description of fracture handled in the postprocessing part of a Finite Element Analysis (FEA). Its fully energetic formulation avoids the introduction of extra degrees of freedom to model fracture propagation. Following previous works on eigenerosion, in this publication, a modified formulation of eigenfracture it is introduced, where it is distinguished between compression and tension loaded state.

Those involved in the modelling of the failure of plain/reinforced concrete using damage and plasticity might be interested in our webpage

http://petergrassl.com/Research/DamagePlasticity/CDPMLSDYNA/index.html

which we have created to support our concrete damage plasticity model CDPM(2) in LS-DYNA. You can find there a number of example input files, reports and our implementation of the model in the form of a user subroutine.

Could be of interest for some of you.

http://io9.com/how-the-ancient-romans-made-better-concrete-than-we-do-16...

Kind regards, 

Thomas Laverne

Simulation and Modeling Engineer

Schlumberger

Dear all,

We recently publsihed a study on modeling rapid chloride migration in concrete using the lattice modeling approach. Registered subscribers can view the article at:

http://www.sciencedirect.com/science/article/pii/S0008884614000799

We appreciate any comments or suggestions.

 Regards 

Hi all,

Dear all,

 Our paper titled "Cracking of the concrete cover due to reinforcement corrosion: A two-dimensional lattice model study"
 has just been published in Construction and Building Materials. It deals with numerical modelling of cracking of the concrete cover as a consequence of reinforcement corrosion, based on the Delft lattice model framework. Registered subscribers can download the article at: http://www.sciencedirect.com/science/article/pii/S0950061813002730

Dear all,

Proceedings of the V International PhD workshop dealing with durability of concrete, which was held in Finland in February, have been published. The publication is available for free download at:  http://www.vtt.fi/inf/pdf/technology/2012/T65.pdf . Many interesting and innovative topic, dealing both with experimental and numerical research of concrete durability, are presented.

Dear all,

 Today our colleague Zhiwei Qian defended his PhD thesis titled: Multiscale modeling of fracture processes in cementitious material. We would like to congratulate Dr Qian on achieving this. The full thesis is available for download at: http://repository.tudelft.nl/view/ir/uuid:734b276c-283a-4f7a-8db2-a18445...

For furher news on our project, follow our blog at: http://microlab-m3c4.blogspot.nl

Regards,

New experiments on cracking and corrosion of steel in concrete performed by the M3C4 team. More details at http://microlab-m3c4.blogspot.nl/

Cheers!

Hi all,

Some news are available at our project blog, check them out at:  http://microlab-m3c4.blogspot.nl/

Regards,

Branko

Hi all,

I am a PhD researcher working on relationship between cracking of concrete and its durability, using both experimental and numerical approaches. The work is being carried out at Delft University of Technology, in the Netherlands. For anyone interested, here is the webpage of the project:

microlab-m3c4.blogspot.com

Please feel free to send us any comments, suggestions, and possible collaboration proposals using the contact details provided on the website.

 Branko

Hello all,

   I am faced with a problem of modelling a reinforced concrete beam
wrapped with FRP using ANSYS. Can any one help me out please?

I would appreciate your response about this issue. Thnk ya all