Google Google Scholar. Prestress is unique in that it follows the Brazilian codes and allows the user to work in a 3D space. These are losses due to: friction between the cable and its duct; anchorage slippage; and the elastic deformation of the concrete. When a table is opened, it is set to a default configuration. Guide 5. For Later. With these equivalent loads in combination with the live and dead loads along the structure’s service life, the software can then perform the serviceability limit state stress check.
 
 

Autodesk robot structural analysis professional 2015 french free download

This work presents an interactive graphics computational tool for the verification of prestressed concrete beams with post-tensioned bonded tendons to the serviceability limit state SLS stress check according to the Brazilian code NBR The tool is an add-in for Autodesk Robot Structural Analysis Professional rwhich serves as a structural modeling platform.

With data supplied by the user по этому адресу a graphics user interface, узнать больше здесь program here developed calculates all relevant prestress losses that occur throughout the structure’s life-cycle, along with the prestress’ equivalent loads during this period. The traditional calculation methods, obtained in the NBRare presented along with the modifications which had to be implemented in order to allow for incremental loss calculations.

Usage нажмите чтобы увидеть больше and results are presented, validating the adopted methodology. At the end of the software’s calculation, the user receives two outputs: the prestress’ equivalent loads in the Robot model and an Excel spreadsheet. The spreadsheet contains the resultant stresses in the beam and warns whether these are greater than the permissible stresses in the SLS stress check. The loads may then be used in other calculations, such as shear reinforcement.

The fundamental concept is to bring all the dosnload from the disparate disciplines into a single database. One then has a single structural model which incorporates all the structure’s life-cycle information: architectural, structural, hydraulic, electric, mechanical, as-built, and maintenance projects.

Prestressed concrete structures, however, tend to be modeled separately in specialized software which does not attempt to follow the BIM philosophy. To aid in the unification of prestressed structural models with BIM, this work presents a computational tool for the serviceability limit state stress check of bonded post-tensioned concrete beams according to Brazilian codes via Autodesk Robot Structural Analysis Professional rhenceforth referred to as Xtructural. This software, named Prestressis an structjral for Robotleveraging its structural modeling analywis to obtain profeswional loads and stresses arising from the prestress.

Robot was chosen as the platform for Prestress because it is part of the Autodesk environment. Access on 2 set. For this dwonload, though it is not strictly necessary, adopting autodesk robot structural analysis professional 2015 french free download company’s closed environment simplifies the implementation of the BIM philosophy for now.

With Перейти на страницу as a platform, Prestress can now unify the prestressing calculations strictural those of the global structure.

Though not yet implemented, Prestress can still be extended to add the prestressing to an Autodesk Revit 4D model to check for possible interferences and inclusion in the structure’s life-cycle analysis. From a structural model created within Robot and prestressing data given by the user, prestress losses are calculated, isostatic bending moments are obtained and equivalent loads are applied.

The program’s calculations are boundary-condition-agnostic, successfully dealing with isostatic and statically indeterminate beams. The effects of the boundary conditions are considered by Robot and incorporated in Prestress. Once the possibly statically indeterminate stresses are obtained, the software then performs a serviceability limit state stress check on the beam and generates an.

A limitation anwlysis Prestress at present is that it cannot correctly calculate structures which are built in stages. It is therefore impossible for Prestress to accurately calculate segmental bridges or prefabricated beams with cast-in-place decks which по этому адресу usually considered to work with the beam for download teams wide msi. There are at present already multitudes of software in the market which aid the engineer нажмите чтобы прочитать больше the analysos of prestressed concrete structures.

All of these are evidently far more advanced and professiona, than the naalysis here developed. Belo Horizonte, MG: Originally presented as master’s thesis, Downloax Federal de Minas Gerais, Automation of the evaluation of bonded and unbonded prestressed concrete beams, according to brazilian and french code specifications.

Gobot on 23 apr. Prestress is unique in that it follows the Brazilian codes and allows the user to work in a 3D space. Compared to the works of Bortone and Lazzari et al. This means the engineer need not create two structural models: one to calculate the prestressed element and another to obtain the behavior of the rest of the analysiz.

Having the autodesk robot structural analysis professional 2015 french free download loads within the global structural model also allows the user to observe the effect of the prestress in the entire structure. The following sections will present the procedures adopted by the software and two examples.

One example is that of an isostatic beam, while the other is of a statically indeterminate structure. Each example presents the information relevant for prestressing and the rohot containing the results. The Prestress software requires that the user already have a complete structural model defined in Robotincluding constraints and load cases. It is essential that the beam be allowed to deform according to the real boundary conditions, therefore great autodesk robot structural analysis professional 2015 french free download must be taken in the definition of the constraints.

For instance, if a downoad two extremities have constraints which do not allow the beam to be autodesk robot structural analysis professional 2015 french free download, a large part of the prestress will be lost. The user then selects the beam autodesk robot structural analysis professional 2015 french free download be prestressed, which may be composed of one or more bar segments. Via a graphical user interface, the engineer autodesk robot structural analysis professional 2015 french free download input the requisite prestressing data.

This includes autodesk robot structural analysis professional 2015 french free download number of cables, each cable’s longitudinal layout, section area, pull stress, and relevant prestress loss coefficients, as well as material properties for both concrete and steel and the desired level of prestress: limited or autodesk robot structural analysis professional 2015 french free download prestress. Partial prestress, which permits the concrete to crack in tension, is not allowed.

The units adopted by Prestress are taken directly from the Robot model, so as to allow the user to work with the unit system s he has previously defined. Another key piece of data the user must present is the different xownload of a structure’s lifecycle.

Recommendations for estimating prestress losses. PCI Journal, v. The user, however, is free to alter both the number and dates of phases. Each phase is defined by the concretes age pgofessional the end of the phase, the dead and live loads that are applied and the cables that are jacked on that phase, along with representative values of temperature and humidity for that phase.

Should the prestressing pfofessional occur in windows 10 pro drivers update free download stages, this should be represented in autpdesk user’s input, preferably by including additional phases. Figures [1] and [2] show the windows where the user enters all relevant data. Figure 1. Options tab.

Figure 2. Cable tab. With this data Prestress then calculates all relevant prestressing losses: friction, anchorage slippage, concrete elastic deformation, creep and shrinkage, and steel relaxation.

A curved cable under tension tends to straighten, but this is impeded by the concrete and its self-weight, so the cable applies a distributed force along the beam’s span. The standard method of defining an equivalent load to simulate this force was qutodesk by Lin [ 6 6 LIN, T. Design of prestressed concrete structures. This method, however, is not generic since it requires a beam of autodesk robot structural analysis professional 2015 french free download section [7].

Figures [3][4] and [5] present three different variable beams. The first structufal a beam of variable height, prestressed with a straight dree. Though the tendon has no deflection, the eccentricity of the cable to the beam’s centroid is variable, leading to a flexural stress-state anaalysis the beam. The second presents a beam with variable height but with a polygonal cable which always follows the beam’s centroid.

Though the cable has a deflection, in this case the autodesk robot structural analysis professional 2015 french free download stress-state is that of pure compression. The third case presents a beam with a sudden change of section.

It is clear that where the cable is aligned with the centroid, the beam is under pure compression, but where the cable is offset from the centroid, the beam presents a bending moment. It is therefore necessary to adopt a more autodesk robot structural analysis professional 2015 french free download function for equivalent loads.

Figure 3. Variable-height beam with straight cable. Figure 4. Variable-height beam with variable cable. Figure 5. Beam with section discontinuity and a straight cable. This method generates a polygonal approximation of the beam’s prestressing bending moment diagram, regardless of the boundary conditions.

If the structure is statically indeterminate, then the boundary conditions will naturally generate the correct diagram. This equivalent load method also satisfies the condition of being self-balanced, generating no reactions autoodesk supports in isostatic structures.

Analywis 6. Beam under distributed and equivalent loads. The equivalent loads of each phase of the structure’s service life are left in the model after Prestress is complete, allowing the user to make use of these loads if so desired.

A prestressed cable is jacked downolad to a specified stress. This stress, however, is not constant along the cable’s length, nor is it constant in time. The losses can be simply roboot into two groups: immediate and progressive losses. The immediate losses, as the name would imply, happen at the act of jacking. These are losses due to: friction autodssk the cable and its duct; anchorage slippage; and the elastic deformation of the concrete.

The progressive losses are time-dependent, ever-approaching an asymptotic value at the end of the profwssional service-life. These are the losses due to steel relaxation and concrete creep and shrinkage. The methods adopted by Prestress are summarized below.

Friction losses are calculated according to item 9. ISBN Prestress adopts the cable’s stress diagram after friction losses and finds X by incrementally calculating the area between porfessional diagram and its version mirrored over P X.

Losses due to the elastic deformation of concrete from prestressing and dead loads are also considered. Prestress currently only calculates post-tensioned bonded cables. Such cables only suffer elastic deformation losses due to the prestressing of subsequent cables, but not due to their 20115 jacking. If cables are pulled at different dates, then the effect of the jacking of the latter strucyural will only be computed at that later date.

This allows the software to consider the effect of the differed losses discussed below on the former cables prior to the influence of the elastic deformation losses. The treatment of the progressive losses is more anakysis. These losses are interdependent, with the result of one altering the result of the other and visa-versa.