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ETABS

INTEGRATED ANALYSIS, DESIGN AND DRAFTING OF BUILDING SYSTEMS

The innovative and revolutionary new ETABS is the ultimate integrated software package for the structural analysis and design of buildings. Incorporating 40 years of continuous research and development, this latest ETABS offers unmatched 3D object based modeling and visualization tools, blazingly fast linear and nonlinear analytical power, sophisticated and comprehensive design capabilities for a wide-range of materials, and insightful graphic displays, reports, and schematic drawings that allow users to quickly and easily decipher and understand analysis and design results.

From the start of design conception through the production of schematic drawings, ETABS integrates every aspect of the engineering design process. Creation of models has never been easier – intuitive drawing commands allow for the rapid generation of floor and elevation framing. CAD drawings can be converted directly into ETABS models or used as templates onto which ETABS objects may be overlaid. The state-of-the-art SAPFire 64-bit solver allows extremely large and complex models to be rapidly analyzed, and supports nonlinear modeling techniques such as construction sequencing and time effects (e.g., creep and shrinkage). Design of steel and concrete frames (with automated optimization), composite beams, composite columns, steel joists, and concrete and masonry shear walls is included, as is the capacity check for steel connections and base plates. Models may be realistically rendered, and all results can be shown directly on the structure. Comprehensive and customizable reports are available for all analysis and design output, and schematic construction drawings of framing plans, schedules, details, and cross-sections may be generated for concrete and steel structures.

ETABS provides an unequaled suite of tools for structural engineers designing buildings, whether they are working on one-story industrial structures or the tallest commercial high-rises. Immensely capable, yet easy-to-use, has been the hallmark of ETABS since its introduction decades ago, and this latest release continues that tradition by providing engineers with the technologically-advanced, yet intuitive, software they require to be their most productive.

Here are some reasons why?

etabs_img1Object based graphical modeling with unique finite element formulations and auto-meshing enable ETABS to accurately model floors and walls using finite elements as an alternative to rigid diaphragms. This provides important advantages: Accurate, automatic distribution of forces/ moments through slabs and walls for design, and the ability to check and design for axial force in beams – none of which is possible when using rigid diaphragms. No more error prone assumptions regarding uniform load distribution through floors, walls, and framing. Automatic calculation of floor and wall self-weight, mass and stiffness based on section properties.

Auto-meshing provides automatic transfer of gravity and lateral floor and wall loads, even with openings, overhangs, or variable thickness One integrated system – no more time consuming error prone transfer of results and models between different modules or programs for gravity and lateral load analysis and design. Concrete, composite beam, joists, steel design, drift all in one package.

Shear walls – ETABS integrates stresses into one area based on user specified pier or spandrel label. For example, if 8 wall finite elements have been assigned the same pier label, forces and moments will be integrated such that all 8 elements are treated as one (1) pier/column for reinforcement design, and in reporting of shears and moments. Among other advantages, this enables ETABS to treat multiple wall panels as one 3D section if desired. Torsion is automatically converted into shear. Uniform rebar or user pattern. Easily assign openings, variable thickness.

Composite beam design (link to Ashraf’s paper on composite beam)- options for camber, vibration, partial composite connection, user defined or uniform shear connector layout, cover plates, pattern loading, shored or unshored design.etabs_img2

Steel member sizes can be optimized based on strength per design code and/or drift requirements with user defined auto select lists of sections. Compare ETABS optimization to manual trial and error, analyzing one section per member at a time.

Line constraint automatically ‘connects’ course mesh with finer mesh for accurate transfer of loads – this is often the case when walls come into floor elements or into beams where common joints are not shared. Big time saver that prevents errors in load transfer between objects. Only ETABS offers this capability.

True physical member length – When designing and analyzing continuous members which are intersected by other members, ETABS does not break up the continuous member into multiple segments for reporting of results or editing. Compare this with having to manage multiple segments and multiple moment diagrams which represent just one continuous member.

For slab and foundation reinforcement design and punching shear checks, ETABS will automatically transfer forces/moments on slabs for each load case, slab properties and geometry into SAFE design software.

True physical member length – When designing and analyzing continuous members which are intersected by other members, ETABS does not break up the continuous member into multiple segments for reporting of results or editing. Compare this with having to manage multiple segments and multiple moment diagrams which represent just one continuous member.

For slab and foundation reinforcement design and punching shear checks, ETABS will automatically transfer forces/moments on slabs for each load case, slab properties and geometry into SAFE design software.

Similar stories feature – When drawing or editing the model on one story, changes and additions can automatically ripple down to similar stories.

etabs_img3ETABS provides output options you can really use – Instead of typical output reports with non descript nodal deflections, forces & moments, etc., ETABS organizes results to provide: interstory drift, center of mass and rigidity of each level, story by story report of shears and overturning moments, column and beam reactions reported separately on a story by story basis. Results can be reviewed interactively by clicking on members/joints, printed reports, export to Excel or Access database, and generation of usable DXF drawings and CIS/2 files.

Automatic generation of lateral loads – 9 built-in U.S. and international design codes for auto wind loading with windward and leeward assignment options. 7 codes for auto earthquake. Steel design options based on lateral drift.

Automated code design beyond the basics – Automatic load combinations per design code, automatic determination of unsupported lengths, much more.

Advanced analysis – Nonlinear pushover analysis using large deflection with plastic hinge stress/strain curves. Nonlinear staged construction analysis, base isolators, gaps/hooks, structural pounding analysis, linear and nonlinear dampers, P-Delta analysis, rigid link constraints to connect meshes which do not share common joints, panel zone springs at beam/column intersections including effects of doubler plates. Response spectrum, linear and nonlinear time history dynamic analysis, consideration of vertical motion components as well as lateral.