|
|
Автор: Williams
Дата: 7 февраля 2013
Просмотров: 2 554 |
|
CSI ETABS v9.7.4
For nearly 30 years, ETABS has been recognized as the industry standard for Building Analysis and Design Software. Today, continuing in the same tradition, ETABS has evolved into a completely integrated building analysis and design environment. The system built around a physical object based graphical user interface, powered by targeted new special purpose algorithms for analysis and design, with interfaces for drafting and manufacturing, is redefining standards of integration, productivity and technical innovation.
The integrated model can include moment resisting frames, braced frames, staggered truss systems, frames with reduced beam sections or side plates, rigid and flexible floors, sloped roofs, ramps and parking structures, mezzanine floors, multiple tower buildings and stepped diaphragm systems with complex concrete, composite or steel joist floor framing systems. Solutions to complex problems such as panel zone deformations, diaphragm shear stresses, and construction sequence loading are now at your fingertips.
ETABS is the solution, whether you are designing a simple 2D frame or performing a dynamic analysis of a complex high-rise that utilizes non-linear dampers for inter-story drift control. |
|
Читать статью дальше (комментариев - 9)
| |
|
|
Автор: Williams
Дата: 6 февраля 2013
Просмотров: 1 160 |
|
CSI PERFORM-3D v5.0.0
CSI PERFORM-3D was designed for nonlinear analysis and performance assessment for 3D structures.
Displacement Based Design
- Traditionally, earthquake-resistant design has been strength-based, using linear elastic analysis.
- Since inelastic behavior is usually allowed for strong earthquakes, this is not entirely rational.
- Strength-based design considers inelastic behavior only implicitly.
- Displacement-based (or deformation-based) design considers inelastic behavior explicitly, using nonlinear inelastic analysis.
- Displacement-based design recognizes that in a strong earthquake, inelastic deformation (or ductility) can be more important than strength.
- PERFORM-3D allows you to use displacement-based design.
Implementation of ASCE 41
- Procedures for displacement-based design using inelastic analysis are specified in ASCE 41, “Seismic Rehabilitation of Existing Buildings”.
- ASCE 41 applies to the retrofit of existing buildings, but the procedures can be applied to the design of new buildings.
- PERFORM-3D implements the procedures in ASCE 41.
- However, PERFORM-3D is a general tool for implementing displacement-based design. It is not limited to ASCE 41.
Capacity Design
- The response of a structure to earthquake ground motion, whether elastic or inelastic, is highly uncertain.
- Capacity design is a rational way to improve the response of a structure in a strong earthquake, by deliberately controlling its behavior.
- Capacity design controls the inelastic behavior of a structure, by allowing inelastic behavior only in locations chosen by the designer. In these locations the structural components are designed to be ductile. The rest of the structure remains essentially elastic, and can be less ductile.
- Controlling the behavior in this way improves reliability, reduces the amount of damage, and can reduce construction costs.
- PERFORM-3D allows you to apply capacity design principles.
What PERFORM-3D is NOT
- PERFORM-3D has powerful capabilities for inelastic analysis, but it is not intended for general purpose nonlinear analysis.
- If you have no idea how your structure will behave when it becomes inelastic in a strong earthquake, PERFORM-3D can probably help you to identify the weak points, and hence can guide you in improving the design.
- However, PERFORM-3D is not intended for “design by analysis”, where the engineer expects the analysis to determine exactly how a structure will behave.
- PERFORM-3D is a powerful tool for implementing displacement-based design and capacity design. It will help you to produce better designs, but it will not do the engineering for you.
|
|
Читать статью дальше (комментариев - 5)
| |
|
|
Автор: Williams
Дата: 31 января 2013
Просмотров: 729 |
|
LibreCAD v1.0.2
LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation is free from our large, dedicated community of users, contributors and developers. You can download, install and distribute LibreCAD freely, with no fear of copyright infringement.
LibreCAD is a feature-packed and mature 2D-CAD application with some really great advantages:
- It's free – no worry about license costs or annual fees.
- No language barriers – it's available in a large number of languages, with more being added continually.
- GPLv2 public license – you can use it, customize it, hack it and copy it with free user support and developer support from our active worldwide community and our experienced developer team.
- LibreCAD is an Open Source community-driven project: development is open to new talent and new ideas, and our software is tested and used daily by a large and devoted user community; you, too, can get involved and influence its future development.
|
|
Читать статью дальше (комментариев - 0)
| |
|
|
ПОИСК ПО САЙТУ |
|
|
|
|