ATENA 5.9.0 will be released this summer ans Newsletter May 2021 > 공지 및 뉴스

본문 바로가기

고객지원센터

공지 및 뉴스

ATENA 5.9.0 will be released this summer ans Newsletter May 2021

페이지 정보

profile_image
작성자 관리자
댓글 0건 조회 535회 작성일 21-05-12 13:13

본문

.

Cervenka Consulting Logo

FacebookTwitterYouTube
Newsletter May 2021

 

ATENA Development

ATENA 5.9.0 with unique capabilites will be released this summer


Dear ATENA users and prospects,

we hope you are doing well, staying safe and healthy. 

Our previous ATENA 5.7 version already represented a huge step forward with some remarkable new features such as ASR, corrosion or durability modelling. Before we finished the previous version, we had already started working on ATENA 5.9 knowing that we would like to enhance the existing features as well as add some new ones. 

We proudly announce that have successfully accomplished our mission by preparing a new ATENA 5.9. for you. Not only did we further develop and tested the reinforcement modelling and durability, but we also added some exciting new features such as 3D printing of concrete, improving our program interface (ATENA Center) in order to simplify the navigation through ATENA, and modifying the program protection system, by enabling you to use software hardlocks instead of regular USB protection keys. It means accessing ATENA is now a lot easier, especially for those who have to deal with difficult custom processes when we are shipping the software to their attention.

Do not miss a chance to evaluate a 5.9. beta version by renewing your ATENA maintenance license. In case you are actively using ATENA and your maintenance is valid, please do not hesitate to ask us to test this new beta version or follow the news on our website.

We encourage you to send us your comments or tips for improvements. This would be highly appreciated. Thank you in advance. 

We look forward to continuing our cooperation and launching new partnerships with those of you who are not yet ATENA users. 

With best regards from Prague

Your Cervenka Team

 

ATENA v5.9.0 new features

ATENA v5.9.0 will be released in May as a public beta version. All users with valid maintenance support are eligible for downloading and evaluating this new step in ATENA development.

Among others it contains the following major new developments and changes:

- ATENA Center is a new frontend interface, which provides an easy navigation through various ATENA system software tools, tutorials, documentation and example problems.

- 3D printing modelling of concrete can be simulated by ATENA now. In addition to the numerical model, the user can provide the printing path and printing speed along with time dependent material properties to simulate the printing process. This new feature can be used to simulate and verify the structural stability during the printing process or the behavior of the final structure taking into account the effect of the printing process on its final strength, reliability or durability.

IMAGE:

Fig. 1: ATENA Center for easy navigation and access to programs, tools, documentation, tutorials and examples.

 

IMAGE:

Fig. 2: Modelling of 3D printing is one of the main new features in ATENA. The figure shows the cracking in the simulation of a 3D printed concrete segment for a pilot building in Czech Republic.

- APIS FRC – new tool for the automatic determination of input data for Fibre-reinforced concrete materials (FRC) from standard three or four point bending tests.

- Automated report generation allows for tailored generation of typical reports that can be further customized or enhanced based on the requirements of each project you are working on.

- Durability and corrosion modelling has been enhanced and input dialogs are simplified with generation wizards and help tools for easier definition of input parameters for chloride ingress, carbonation and corrosion modelling.

- New reinforcement cycling material was implemented on the basis of Dodds & Restrepo model, which supports more intuitive definition of input parameters for dynamic and seismic analysis of RC structures. In addition, the cycling reinforcement models are available now also for the smeared reinforcement model.

- Improved reinforcement bond model can consider the effect of reinforcement corrosion or high temperatures during fire analysis on the bond strength. This means the provided slip law is scaled by temperature and corrosion dependance laws.

- Software hardlocks are available for ATENA in addition to the standard USB protection hardlocks. This simplifies the distribution as there is no need for any shipping, and this option can be also advantageous for network installations.

- Plus many other minor improvements, additional increase in analysis and post-processing speed for large scale models, and various bug fixes.

ATENA Success Stories

Drlík, P., Červenka, V., Červenka, J.: Biomechanical Simulation of Peyronie’s Disease, Applied Bionics and Biomechanics, vol. 2021, Article ID 6669822, 6 pages, 2021, https://doi.org/10.1155/2021/6669822.

This paper shows ATENA application to biomechanics. A pathological disorder of human penile function, known as Peyronie’s disease, is characterized by the formation of plaque particles within the tunica albuginea. The plagues in the shape of rigid plate form in the scars as a result of the imperfect healing process.

IMAGE:

Fig. 3: Mesh discretization of the penis model.

 

IMAGE:

Fig. 4: Von Mises stress distribution in tunica albuginea with plague. Case A.

Due to high stiffness, plagues are the source of pain and anomalous deformations during erectile penis function. The authors simulate the biomechanical behavior of the penile structure by a 3D finite element model. The numerical model is based on the real geometrical shape and the tissue structure with consideration of large nonlinear deformations.

 

 

The penile erection is modeled by the initial strains imposed on the corpus cavernosa. The stress analysis is performed in a case study of various plague locations. The Peyronie’s syndrome manifested by the penis angular deviation simulated by the analysis is compared with the clinical data. The computational simulations provide a rational explanation for the clinical observations on patients. The objective is to apply the proposed modeling approach for the development and validation of treatment methods based on the application of shock waves.

IMAGE:

Fig. 5: Deformed state of the penis in scale 1:1 showing angular deformation due to Peyronie's disease.

 

IMAGE:

Fig. 6: Crack pattern at peak load 148kN, cracks > 0.05 mm in the static analysis.

Al-Saoudi, A., Kalfat, R., Al-Mahaidi, R., Cervenka J., Pryl, D.: Numerical and experimental investigation into the fatigue life of FRP bonded to concrete and anchored with bidirectional fabric patches, Elsevier Ltd., 4/2021, https://doi.org/10.1016/j.engstruct.2021.112335.

This paper shows application of ATENA fatigue model. It presents a summary of numerical and experimental investigations conducted to evaluate the fatigue performance of externally-bonded FRP laminates anchored with bidirectional fibre patch anchors. The anchored laminates were bonded to reinforced concrete (RC) blocks and subjected to various cyclic loading scenarios. Parameters such as the stress range, peak cyclic stress level, and the corresponding number of cycles prior to failure were noted. The results were used to generate an S-N curve relationships.

 


A finite element model was developed and calibrated based on the experimental results. Modelling of experimental specimens was performed using the ATENA Science program for non-linear FEA in RC structures. Calibrated control and anchored models were developed to represent the actual specimen used in the experimental test. For validation purposes, all the material properties used in the calibration of FEA were based on experimental measurements as well as theoretical models and research findings. The simulations showed successful calibration modelling of static and fatigue tests that produced good correlations with the experimental measurements on the basis of ultimate static capacity, fatigue number of cycles, strain readings, and mode of failure.

ATENA modelling of anchored FRP strengthening tests in static and fatigue loading you can see in this video.

IMAGE:

Fig. 7: Deformed shape and crack widths after failure due to fatigue loading.

 

IMAGE:

Fig. 8: Example of deteriorated Gerber saddles in RC road bridges.

Santarsiero, G., Masi A., Picciano V.: Durability of Gerber Saddles in RC Bridges: Analyses and Applications (Musmeci Bridge, Italy), Infrastructures 2021, 6, 25., https://www.mdpi.com/2412-3811/6/2/25

ATENA durability model has been used in this interesting paper on assessment of safety levels of critical infrastructures such as bridges that are essential to modern societies and their vital services. Bridges with reinforced concrete structures are subject to deterioration due to corrosion. Gerber saddles are among the key components which are especially exposed to environmental actions. In this paper, a framework for the durability analysis of these components is proposed, considering the simultaneous presence of permanent loads and environmental actions under the form of chloride ions. Nonlinear numerical simulations adopting the finite element code ATENA are performed, accounting for chloride ingress analyses. The presence of cracks (due to applied loads and/or design/construction defects) which may speed-up corrosion propagation, steel reinforcement loss, cracking and spalling, and their effects on the load-bearing capacity is considered.

 

This framework has been applied to the Gerber saddles of a prominent reinforced concrete (RC) bridge, namely the Musmeci bridge in Potenza, Italy. Durability analyses made it possible to evaluate the saddles’ strength capacity at the time of construction, after forty-five years since the construction, and at an extended time of fifty years. The results show that corrosion can influence both the ultimate load capacity and the collapse mechanism.

IMAGE:

Fig. 9: (a) Crack pattern and (b) reinforcement stress distribution at peak load considering ATENA new reinforcement corrosion model.

Research and Development Projects

Projects completed in 2020

첨부파일

댓글목록

등록된 댓글이 없습니다.


그누보드5
  • 서울시 도봉구 도봉로106길 22, 201-508 (북한산현대홈시티) TEL : 02-529-0841 FAX : 02-529-0846
  • Copyright © CNG SOFTEK CO., LTD. All rights reserved.