BrainMap

Mr. Daniel-Viorel Ungureanu

Professor

Professor - UNIVERSITATEA POLITEHNICA TIMIŞOARA

Researcher | Teaching staff | Scientific reviewer | Designer | PhD supervisor

Web of Science ResearcherID: A-5144-2017

Curriculum Vitae (15/04/2024)

Expertise & keywords

Industrial prototype for structural systems with cold-formed steel beams, with corrugated web assembled with welding technologies with high productiviy Call name: P 2 - SP 2.1 - Proiect de transfer la operatorul economic
PN-III-P2-2.1-PTE-2021-0237 2022 - 2024

Role in this project:

Coordinating institution: ANOTECH STEELWORKS S.R.L.

Project partners: ANOTECH STEELWORKS S.R.L. (RO); UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Affiliation:

Project website: https://anotech.ro/wellformed-frames-wf/

Abstract:

The project proposes the testing, evaluation and validation of an industrial prototype for structural system with cold-formed steel beams, with corrugated web. The project includes an experimental campaign, extended by numerical simulations, with the purpose of characterization and optimization of connection joints and also a scale 1:1 prototype under real operational conditions. The technical solution will be raised to the technological level TRL 6, in order to be introduced on the commercial market.

Structural design tool for cold-formed steel structures Call name: P 3 - SP 3.5 - Proiecte Eurostars 2019
EUROSTARS-2019-E!113493-CFSExpert 2020 - 2022

Role in this project:

Coordinating institution: GORDIAS SRL

Project partners: GORDIAS SRL (RO); UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Affiliation: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Project website: http://http:\\gordias.ro\cfsexpert

Abstract:

There is a growing trend in the construction industry to use lightweight CFS members due to their efficiency in weight, production and construction time. On the other hand the behaviour of these members are very difficult and no widespread and efficient application software exists to support the design, so the companies usually do costly experiments to prove the reliability of their structure. A suitable design tool can help those companies which can not invest much but want to use CFS elements. The project aims to develop a calculation core for the design of structures composed of cold formed members, which will be implemented in three different structural softwares: CFSExpert Structure, CFSExpert Member and CFSExpert Engine. The CFSExpert software packages will fill a market gap of missing complete design tools supporting the complex design of CFS structures accordingly we expect great interest from structural engineering companies. The companies already having CFS products can accelerate their design process and widen their product range using this software. The greater part of our possible market consists of those companies which realize new possibilities in using CFS in their structures by using this software.

Safety of buildings walls and claddings against accidental explosions Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2019-1765 2020 - 2022

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMIŞOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO); UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NAŢIONAL DE CERCETARE - DEZVOLTARE PENTRU SECURITATE MINIERĂ ŞI PROTECŢIE ANTIEXPLOZIVĂ - INSEMEX PETROŞANI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Project website: https://www.ct.upt.ro/centre/cemsig/safe-wall.htm

Abstract:

Exploziile produse în zone urbane sau industriale sunt evenimente cu probabilitate redusă, dar cu potential distructiv ridicat. Daca exploziile se produc la mică distanță, apar avarii structurale (cedari locale, colaps) și implicit victime (ranire grava, deces). Prevenirea prăbușirii clădirii este deci esențială pentru a reduce pierderile de vieti omenesti. Cu toate acestea, chiar daca exploziile nu conduc la prăbușirea clădirii, resturilor desprinse din elementele de închidere pot produc numeroase victime. Acest risc poate fi redus prin proiectarea adecvata a clădirii și renunțarea la anumite materiale, detalii de alcătuire și tehnici de construcție. Cu toate acestea, în cadrul normativ european, nu exista prevederi privind protectia impotriva exploziilor externe accidentale sau intenționate. Așadar, există un real interes in elaborarea de reguli de proiectare și norme de bune practici pentru proiectanți, constructori și autoritati.

Proiectul urmareste cresterea nivelului de siguranta al sistemelor de inchidere pentru cladiri, oferind ocupanților protecție împotriva efectelor directe (unda de presiune) și a celor secundare (fragmente si resturi proiectate cu viteza) în urma unei explozii. Deși sistemele de inchidere cu mase/rigiditati mari au fost mult timp considerate adecvate protejării clădirilor împotriva amenințărilor de tip explozie, sistemele ușoare și flexibile sunt din ce în ce mai utilizate în clădirile moderne. Permițând producerea unor avarii (dar nu fragmentare), un astfel de sistem oferă protectie adecvata în cazul unei explozii. Modelul demonstrativ include mai multe tipologii de elemente de inchidere, adoptate pe scara larga la clădirile in cadre, care sunt fixate pe o structură in cadre din oțel 3D și testate împotriva exploziilor produse la diferite distante. Sunt vizate si sistemele de fixare/ancorare a panourilor de pereți, deseori proiectate si detaliate pe bază empirică, a caror performanta va fi validata în condiții de solicitare extremă.

Smart buildings adaptable to the climate change effects Call name: P 1 - SP 1.2 - Proiecte complexe realizate in consorții CDI
PN-III-P1-1.2-PCCDI-2017-0391 2018 - 2021

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMIŞOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO); UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO); UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU INGINERIE ELECTRICA ICPE - CA BUCURESTI (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Affiliation: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Project website: https://www.icer.ro/cercetare/proiecte-de-cercetare/cia-clim

Abstract:

In the construction domain, the energy represents the key-point in achieving efficient buildings.

The project proposes the improvement or institutional performances between three universities and two research institutes for the revival of the research activities and transfer of knowledge between partners.

The 4 proposed projects, centred on the efficient energy buildings, are focused on two principal research directions: (i) use of smart facades with low-thermal transfer, actively integrated for the enhancement of internal comfort and possessing a passive control of energy (by using the solar energy) and (ii) smart energy efficiency through building automatization and solar energy collectors. The resulted system, the smart house, is conceived thus to minimize the input energy for maintenance.

The Project 1 has as main objective the determination of mechanical properties of cellular materials used as thermal insulations in smart façade systems, through mechanical compression, bending and toughness fracture testing of such cellular materials.

Project 2 is focused on obtaining, characterizing and testing of high-property materials used for smart facades as thermal insulation materials and as support for special property layers: photo-catalytic layers and with reduced absorption/reflexion of UV-VIS-IR radiation.

The Project 3 has as main objective the theoretical and experimental investigation of the implementation of the electric power distribution in direct current for individual households or in small communities (smart-grid), with renewable energy sources integration.

The scope of the Project 4 is to implement the knowledge and data resulted from projects no. 1-3 through a modular laboratory demonstrative application. The project will perform an integrated study on the influence of the facades and the energetic contribution to the internal comfort of the building by considering different façade systems and respectively by integrating a smart-grid energy system.

Fast welding cold-formed steel beams of corrugated sheet web Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-1684 2017 - 2018

Role in this project:

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMIŞOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Affiliation: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Project website: http://www.ct.upt.ro/centre/cemsig/wellformed_ro.htm

Abstract:

The main aim of the project is to test and validate a NEW technological solution for built-up cold-formed steel beams, with corrugated sheet webs and built-up cold-formed steel flanges. The connecting technologies, such as modern welding, i.e. Spot welding and Cold Metal Transfer welding will be examined. A large experimental program, will be set-up to demonstrate and evaluate the performances of the proposed solutions. The experimental program will be extended by numerical simulations of connecting details and full scale beams, in order to optimise the fastening technology and relevant components. The basic parameters considered in the research are: (1) Web-to-flange fastening technology; (2) Web corrugation depth; (3) Web-to-flange fastening pitch; (4) Shear beam-end panel; (5) End-connections; (6) Lateral restraining. Based on experimental tests, calibrate and validate advanced numerical models for global analysis of beams will be developed. The models will be used to test numerically beams with larger spans, i.e. 15, 18, 21, 24 m, in order to demonstrate the feasibility of proposed solutions and their technical and economical performances. The proposed technical solution has a great potential for mass production and, due to its conceptual and technological novelty, offers the opportunity to obtain a patent.

Seismic protection of engineering structures through dissipative braces of nano-micro magnetorheological fluid dampers Call name: Joint Applied Research Projects - PCCA 2013 - call
PN-II-PT-PCCA-2013-4-1656 2014 - 2017

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMIŞOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO); ROSEAL S.A. (RO); INSTITUTUL DE MECANICA SOLIDELOR (RO); ACADEMIA ROMANA FILIALA TIMISOARA (RO); TITAN ECHIPAMENTE NUCLEARE SA (RO)

Affiliation:

Project website: http://www.ct.upt.ro/centre/cemsig/semnal-mrd.htm

Abstract:

There are three strategies that can be used for seismic protection of structures: 1) reduce seismic demands; 2) enhance structural damping and 3) use active or semi-active structural control. Present project is framed in the third strategy focusing on semi-active systems. A semi-active device has properties that can be adjusted in real time but cannot inject energy into the controlled system. Many of them can operate on battery power alone, proving advantageous during seismic events when the main power source to the structure may fail. One of the most promising devices suitable for implementation into a semi-active control appears to be magneto-rheological (MR) dampers, which succeed in overcoming many of the expenses and technical difficulties associated with other types of semi-active devices. Response characteristics of magneto-rheological devices can be changed by varying the magnetic field through different current inputs. In addition to its small power requirement, the MR damper can generate large forces at low velocities. Currently there are MR dampers with capacities up to 200 kN and research results proved the possibility to obtain capacities up to 400-500 kN.

Present project intends to apply the nano-micro composite magnetizable fluids (MRF), whose properties may be tailored for the use in semi-active MR devices, with expectation to obtain appropriate and easy controllable performance for seismic protection applications, characterized by random low frequency motions of significant amplitudes. Previous experience (patents) of partners in the project consortium on using this technology to produce high pressure rotating seals already exists and offers a good starting base for present application. The possibility of fine tuning of the magneto-rheological response is a highly attractive feature of the nano-micro composite MR fluids, and that will be fully investigated and exploited. The MR response is dependent on the mean size and volume fraction of multi-domain ferromagnetic particles, but also on the volume fraction (saturation magnetization) of the magnetic nano-fluid carrier. The parameters of composition ensure manifold controlling mechanisms of the MR behavior of the nano-micro MR fluids and their fine tuning to the requirements of the envisaged MR damping devices for seismic protection of structures under different seismic motion characteristics. One MR damper of low capacity will be designed, fabricated and tested under different loading conditions (triangular, sinusoidal and random excitations). Numerical hysteretic models will be calibrated on the tested MR damper enabling modeling of structural response. Since the dampers in structural systems will be installed coupled with braces, both single damper and brace-damper assembly tests will be performed. With a numerically simulated control unit, structural systems equipped with brace-damper assemblies will be numerically tested in order to observe and characterize their behavior. The main outcomes of the project are: 1.Micro-nano composite MR fluid recipes for seismic semi-active dampers ; 2.Technical solutions for MR dampers; 3. A 10t MR damper prototipe; 4.Validation tests of brace-damper systems; 5.Numerical evaluation of effectiveness of MR dampers in reducing seismic effects in structural applications. Some of these results ((1) and (2)) might be patented. Moreover, the project will develop and provide an implementation plan, with the further research needs and technological developments aiming at implement in the current fabrication the MR nano-fluid dampers by the industrial partners. A consortium composed by two research centers of PU Timisoara, two research institutions of Romanian Academy, experienced in seismic engineering, complex ferro-fluid applications and structural control, and two industrial partners, with experience and capabilities for fabrication of MR fluids and dampers will be able to achieve the objectives of the project.

Structural conception and COllapse control performance based DEsign of multistory structures under aCcidental actions Call name: Joint Applied Research Projects - PCCA-2011 call, Type 2
PN-II-PT-PCCA-2011-3.2-1303 2012 - 2016

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMIŞOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO); UNIVERSITATEA TEHNICA CLUJ ACTIVITATE ECONOMICA (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE IN CONSTRUCTII, URBANISM SI DEZVOLTARE TERITORIALA DURABILA "URBAN-INCERC" (RO); INSTITUTUL NAŢIONAL DE CERCETARE - DEZVOLTARE PENTRU SECURITATE MINIERĂ ŞI PROTECŢIE ANTIEXPLOZIVĂ - INSEMEX PETROŞANI (RO); ACI CLUJ S.A. (RO)

Affiliation:

Project website: http://www.ct.upt.ro/centre/cemsig/codec.htm

Abstract:

The development of design guides for collapse control of the multi-story buildings started in 1968 with the collapse of the Ronan Point high-rise building in the United Kingdom, due to a gas explosion. The failure of the building was identified as a "progressive collapse", because the extent of damage was disproportionate compared to the initial cause. Three decades later, in 2001, the attack against the twin towers of the World Trade Center caused the complete failure of the two buildings and massive loss in lives and property. The type of collapse was again identified as progressive collapse. More recently, during the winter 2005/2006, several construction halls, shopping centers or hotels have been damaged or destroyed throughout Europe due to very heavy snowfalls. The concept of collapse control design can be considered the most appropriate approach for preventing the progressive collapse in case of extreme load events. In principle, the collapse control design method assesses and improves the redundancy of buildings by assuming the loss of structural members such as columns and beams due to extreme accidental loads and assessing how many members might be lost until the entire collapse of the building. The main objective of the project is the development of a performance based robustness design methodology for mitigation the progressive collapse of multi-story frame buildings against extreme load events, coming from both natural and man-made hazards. On this purpose, the research project will aim at definition, evaluation and modeling of the hazards, development of models for characterization of the material properties under different conditions, methods for structural evaluation and intervention strategies for mitigating the probability of collapse in case of extreme load events. All these subjects have a significant innovative character for actual state of knowledge and codification in Europe. As output, design criteria, numerical models, acceptance criteria.

The Ninth International Conference on Advances in Steel Structures (ICASS2018) Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori
PN-III-P1-1.1-MC-2018-0732 2018 -

Role in this project:

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMIŞOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Affiliation: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO)

Project website:

Abstract:

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List of research grants as project coordinator or partner team leader	Download (136 kb) 14/04/2020
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects