Polaris Wheel Bearings

Case study (I) Study

Let me illustrate with an actual case the result of developing a project in our engineering.
2 weeks ago received an important and difficult assignment: to develop a final design of a building of 40,000 m2 in 2 weeks. The commission came to us through a construction company, which in turn received a proposal from an agency of PM. The client is a leading national business sector and distribution.
Range: do the final design of the building of 40,000 m2 of warehouse and offices. The project consists of building envelope (Structure and cladding). In this case the civil work is excluded. Information
game: very generic blueprint. Time and commitment
: within 2 weeks to generate the documentation in paper and electronic on the specialties listed, for inclusion in the final design of the building overall.

Once clearly identified goals, and held an internal meeting planning approach the work as follows, under the coordination of the head of our engineering:
- assign a senior engineer calculation, which is responsible for the calculation structures in Robot.
- parallel team designers of enclosures, formed by 2 people sometimes begin to work on the Tekla 3D model, model only organize and summarize all the work done by our engineering.
- At 3 days into the structural calculation, we are able to start providing information to the designer of structure, which collects information directly generated by the spreadsheet software Robot, and integrates it into Tekla. Initially proceeds to generate the actual structure without taking the time to definitive joint design. Interested at this early stage the largest possible volume model structure.
- Planners of well defined walls of the building envelope, what makes the geometric measure of the project that will have to respect the structure designer. The fact of working in real-time multi-user can see the evolution of all the disciplines, and detect interference between them. Although not our responsibility to the modeling of the civil works, this is inseparable from the building itself, and for best results we proceed to model the concrete base, perimeter walls, floors, etc..
- After 7 days we plan a follow up meeting, which will assist not to move forward the work. Generate an exportable model 3D, we provide the builder. This model REVIEWER formats can be viewed from any computer without specific software. It also allows on-screen annotation and comments (RFI & CO). The meeting is conducted by the builder to the end customer.

building model in 5 days

appear at the first meeting, by the property, some fears can be attributed to the traditional concept on how to tackle the project, an inertia that we we are changing all the projects in which we participate.

These concerns relate primarily to the lack of availability of information on paper, whose only function is to bring 'peace' to the customer. Indeed we think that the time devoted to the generation of copies and documents 'intermediate' no added value to the project and greatly reduces productivity. The current change is to make the different players in the project are able to interact with the model. Possibly one of the biggest barriers to concepctuales we face.

Bear in mind, what other software is a slow and complex process, the production of maps with our software continues to be a more or less automatic, so our approach is still to continue completing the model and create drawings on the last day.

- will inevitably occur some changes that will affect the design done. Another advantage is that our model is a smart model, where relations between objects are defined. Changing processes such as internal heights or wrought songs, the filmmakers in a very short time, automatically adjusting all the joints and semi-finished flat at the moment.

- 3 days after the meeting, we again have a second follow-up meeting. In this case in our offices and do all the display of a 3D-presentation meeting. For nearly 3 hours we meet 7 people, including the representative of the property, to revisit the state of progress of the project. The result is satisfactory.

- in estrus 3 days we have made a real unions, we detected several inconsistencies in the baseline, inconsistencies are easily detected in a 3D model in conventional 2D medium have gone unnoticed until the construction phase. We have integrated child elements as dock doors, ventilators, lighting, interior partitions, stairs, etc.

- After two weeks we pour all the model information at various levels, as listed in the property, with the conviction of having completed a great job and have improved the initial blueprint. Attached some screenshots

screen that illustrate work

Our organization, with a clear web2.0 and 'low cost' has been charged only direct costs that resulted from this participation (1 responsible departmental computing 1 engineer, 3 acting special projects and coordinated in part) with an economic downright reasonable.
To finish only comment that the executive model is fully realized. We can continue to process orders quickly making materials (Structure, cladding, accessories), generating cutting planes for shop fabrication and assembly drawings.

Endocrinologist Headache

metal industrial buildings under fire

Within the usual contributions the company makes with Polytechnic University of Catalonia, there were 2 projects race to Escuela Superior de Ingenieros Industriales de Barcelona promoted by the current Vircop engineering department.

Both projects deal with the problems of metal structures under the action of fire, knowing that the new regulations and the Technical Code and the Eurocode 3 allows the use of advanced calculation methods instead of more traditional and conservative approaches, in what has become known as the Fire Safety Engineering (ISAI).

As the subject of the two projects were proposed a concept of a building consisting of terraced industrial units usable area between 150 and 250 m2 , compartmentalized by the use of precast concrete.

The first project, ' simulation using computational fluid mechanics of fire scenarios in real industrial sites ', by Adrien Dufour, a study and advanced simulation of different fire scenarios. This project examines the evolution of temperatures in an enclosure taking into account the fire load and sectorisations wall insulation, ventilation, air flows and exhaust gas among other things, and determining the actual fire curves for case 'realistic' (medium risk, intrinsic level 3, 990 MJ / m²) and one case 'critical' (medium risk, intrinsic level 5, 3400 MJ / m²).

One of the conclusions of this study is that, unlike the ISO fire curve (standard fire) when the temperature is always increasing, in real fires the temperature decreases due to lack of fire load between 60 to 90 minutes. In the case of a fire 'realistic' without the intervention of the fighting services, the temperature does not exceed 700 degrees, a temperature value slightly harmful to the metal structure, whereas in the case of a fire 'critical' temperature could reach 1200 degrees.

This study is used as a starting point of the project 'Study thermo-mechanical behavior of a steel structure under the action of fire ' by Teresa Armengou.

By using complex computational tools and simplified methods of calculation are trying to determine the structure of buildings regulatory requirements arcades, and that the collapse of any of the ships on fire did not cause the collapse of neighboring buildings.

different scenarios were analyzed considering the burning fire of a ship and a ship mid corner. The study's findings is that the housing in the worst case holds approximately 18 minutes, and that the force exerted by it on the main portal and sectorization for its collapse is very small magnitude, so that causes no drag neighboring ship. The main structure, protected by elements of passive protection measures (rock wool mortar projected fibrosilicatos, etc), hold the entire fire perfectly, even the most unfavorable for the time required by regulation.

advanced calculation models have improved the designs of ships and conclude that together behave as an industrial pillar type B shares, according to classification RSCIEI. This has been justified that the fire is contained in each bay with no possibility of spread to neighboring buildings or structural collapse in a chain.

Acknowledgements: Dr. Ing Frederic Marimon Carvajal, professor of the Department of Strength of Materials and Structural Engineering of the ETSEIB-UPC .