Three new structural releases
We are pleased to announce new releases of ADC, ADSEC and COMPOS. Details below:
ADC is our concrete analysis and design program. ADC 7.2 replaces the DOS programs ADBEAM, ADRIB and ADSLAB. (A new module for column design is under development to replace ADCOL.) An overview of the capability of ADC is given on our web site at http://www.oasys-software.com/adc/
Design procedure for beams and slabs
The design is split into three phases:
- Analysis
- Redistribution - if required
- Design
Analysis of the sub-frame
ADC works with a sub-frame model rather than individual spans in isolation. This means that the analysis can take account of the stiffness provided by columns and walls. The analysis is carried out using the proven GSA solver.
The user has the option to reduce the peak moments calculated assuming point supports, by taking Into account the column or wall width.
Design of beams and slabs
The design phase consists of a number of key stages:
- Identification of critical sections
- Calculation of the required areas of steel
- Selection of reinforcement to provide the area required
- Rationalisation of selected reinforcement and curtailment checks
- Checking of span-depth ratios
The area of steel is calculated based on the recto-parabolic stress distribution rather than the simplified stress block.
If a bunched solution is required, the maximum number of bars per layer is based on the sum of the equivalent diameter not exceeding 40% of the beam width. The bars may be in bunches of up to three for beams and ribs and up to two for slabs.
New features in Windows ADC
There are a number of new features in the Windows version of ADC including:
- A wizard to allow the initial definition of the model.
- Output can now be tailored without having to close the view and open a new view.
- Self-weight can be included in the calculation.
- Improved data checking.
- Rib sections are checked to ensure that the depth is less than four times the rib width.
- Both code prescribed and user defined loading can be defined. Either or both can be used in the analysis and design.
- Option to open ADC file exported from GSA for beam design.
- Inclusion of notional horizontal loads (BS8110 cl 3.1.4.2)
- Export to DXF.
AdSec is the Oasys general concrete section analysis program. An overview of the capability of AdSec is given on our web site at http://www.oasys-software.com/adsec/.
This latest version of AdSec is a complete rewrite, bringing the ease of use of the Windows interface whilst maintaining the features of the DOS version.
Key features include:
- Section analysis to BS8110 (UK & Hong Kong), plus BS5400. Eurocode2 is currently being developed.
- Section creation wizard
- Compound sections
- Template and general reinforcement
- ULS Capacity/Loads and SLS Load analysis cases
Compos is the Oasys program for the analysis and design of simply supported composite concrete and steel beams.
Enhancements to this version support changes to BS 5950-1:2000. These affect:
- Element classification limits.
- Treatment of slender sections.
- Value of shear buckling resistance.
- Treatment of combined bending and shear when shear buckling is possible.
- Limitations on web d/t.
- You can also now export detailed results.
As part of our effort to provide the best service possible, new builds of Oasys software are made periodically to pick up fixes to known problems in the programs. GSA 8.0 build 15 is available for download and installation now.
Structural Tips & Tricks
ADC Tip: Use GSA to set up your AdBeam models
Continuous beam sub-frames can be exported from GSA for design by AdBeam in ADC.
AdSec Tip: Compound sections
The section wizard can be used to specify component sections; these can be used to build up compound sections.
AdSec Tip: Analysis cases
AdSec uses analysis cases similar to those in GSA. So a ULS analysis case can be defined as 1.4L1 + 1.6L2 where load cases 1 and 2 are dead and imposed loads respectively.
AdSec Tip: Standard to perimeter section conversion
To achieve an almost regular section you can specify a standard section in the section wizard, convert it into a perimeter section (using the 'Options | Expand Section' command) and then adjust the perimeter section in the section wizard. In this circumstance any template reinforcement is converted to general reinforcement ensuring that the reinforcement definition remains complete.
GSA Tip: Preview options when sculpting
Despite GSA's powerful Undo capability it is still worth using the 'Preview' option available in many of the sculpt dialog boxes. Previewing eases the process of experimenting with sculpt commands since the sculpt parameters do not need to be completely re-specified if, say, a 'copy' is carried out with respect to the wrong axis set.
GSA Tip: Re-open initial model by restore backup
When you open a model in GSA a 'manual backup' is automatically made. Using the 'File | Restore Manual Backup' command reinstates the model to the state at which the last manual backup was made. This is easier than closing the model and re-opening since the restored model is immediately displayed in all views that are currently open.
GSA Tip: Use Highlight Edges and Section Display to validate 2D element models
The 'Highlight edges' option in the Graphic Settings dialog identifies all edges in 2D element models, - intended or otherwise! Section Display is useful for determining whether you are looking at the top of a 2D element (light grey) or bottom (dark grey); - make sure the elements consistently face one way or the other, especially if they are taking bending.
GSA Tip: Graphic volumes
The 'Volume' cursor mode is an extremely quick and easy way of identifying the part of your model that you want to look at.
GSA Tip: Online demos
Don't forget that there are many online demos that illustrate the use of GSA. Find these both on our web site and from 'Help | Online demos' within the program.
|