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This space is devoted to SAFE. Please visit the Technical Knowledge Base for documentation on top= ics common to all CSI Software.
SAFE is a software= tailored for the engineering of elevated floor and foundation slab systems= . Slab modeling, analysis, and design procedures feature a suite of sophist= icated tools and applications, couple with post-tensioning, punching-shear,= and beam detailing, and integrate the influence of soils, ramps, columns, = braces, walls (rectilinear or curvilinear), and other interfacial elements.= Interoperability with SAP2000 and ETABS allows users to import models, load= ing, and displacement fields into SAFE for more advanced local assessment o= f slab systems within larger structures.
A 3D-object-based model may originate in SAFE or import from SAP2000, ET= ABS, or CAD. Templates quickly initiate a model. Grid, snap, chamfer/fillet= , trim/extend, circular- and spline-curve controls allow direct drawing of = any slab shape. Replication tools streamline modeling for a series of uniqu= e slab systems, as was done with Studio Gang=E2=80=99s Aqua in Chicago, Ill= inois (Reid, Robert L. Chicago Tower=E2=80=99s =E2=80=98Wavelike=E2=80= =99 Design Features Different Shapes For Every Floor. Civil Engineerin= g Apr. 2007: 22). Up to four simultaneous display windows present the model= . Interactive database= editing presents definition tables in SAFE and Excel.
On this page:
SAFE is ideal for designing traditional and post-tensioned (PT) reinforced-concrete slab systems. The PT pr= ocess is intuitive and comprehensive. Design strips (per grid-line or suppo= rt conditions), banded and distributed tendon layout, tendon profiles, and = jacking options (per force percentage, stress value, or hyperstatic analysi= s) may all be user-defined or automated (with interactive editing features)= according to the following codes: ACI 318-08, AS 3600-01, BS 8110-97, CSA = A23.3-04, Eurocode 2-2004, Hong Kong CP-04, IS 456-2000, NZS 3101-06, Singa= pore CP-65-99. Transfer, final, and long-term PT checks ensure design adequ= acy. SAFE also provides for beam design with post-tensioning capability.
PT design for slabs of complex geometry, in which design strip location = is uncertain, is best served by a fi= nite-element application. FEM techniques also provide 2D or 3D contour = plots of various performance measures, indicating hot spots for po= ssible redesign.
Punching-shear and drop-panel checks are automatic.= If necessary, SAFE designs tie and shear-stud punching reinforcement. Mome= nt-release and rigid-zone options define kinematic relations where vertical= and slab systems interconnect. Point-displacement load assignment is avail= able for support conditions. Point, line, area, tension-only, and compressi= on-only spring supports may also be modeled. Point loading with load-size a= ssignment may be superimposed on punching shear locations. At the foundatio= n level, checks are run for punching shear from piers and piles. Nonlinear = uplift can be implemented through soil-spring modeling. Manual and automati= c point, line, and uniform loads, enveloped and applied per user-defined or= building-code specification, are presented in clear and detailed 3D views.=
SAPFire =C2=AE Analysis Engine translates the object-b= ased model into an optimal finite-element model by coordinating the tessell= ation process with object orientation, observing bounds to establish effect= ive aspect ratios, and connecting mismatched mesh seams where area objects = connect. A sophisticated slab analysis can then proceed with realistic cont= ribution from adjoining systems. SAFE enables the following analyses: nonlinear, cracked-section, long-term crac= ked-section (capturing creep and shrinkage behavior), dynamic, Ritz or Eigen modal-freq= uency, floor-vibration, and foundation-level nonlinear-cracked-slab, am= ong others. Measures may be implemented for deflection control and import o= f parameters from dynamic analysis using ET= ABS. Accurate nonlinear simulation of combined vertical, lateral, and s= econdary response enables effective slab design and detailing.
TheOutput and display features are equally compre= hensive. The Report Generator compiles images and input, analysis, and desi= gn data in organized and customizable reports that may be printed or export= ed in a variety of file formats. Diagrams, contour plots, and animations, a= vailable in 2D and 3D views, display deformed configuration, component resp= onse, and min/max values of response data. The mouse-over feature displays = values at any point. Bearing-pressure contours and vertical-system reaction= s are also depicted.
SAFE automatically generates drawing sheets for plan, elevation, and sec= tion views that detail and dimension framing, reinforcement, and tendon lay= out. Options for title block, drawing scale, font, and line type, color, an= d thickness are available, along with rebar tables and schedules. Tendon vi= ews present anchor and stressing-end indicators. Manual changes in these dr= awings coordinate with the analytical model. Rendered 3D views present exce= ptional visuals of the structure and reinforcement layout. SAFE provides us= eful image- and animation-capture tools for additional graphics. Export to = DXF or DWG format is available for integration with CAD documentation.