Comprehensive CAD-like drawing/editing environment: draw, generate, modify and load elements as well as snap, move, rotate, copy, mirror, scale, split, merge, mesh, delete, apply, trim, extend, etc.
Wind loads are generated automatically (ASCE 7-16/10/05/02/98/95, NBC 15/10/05, NTC 2004, & IS 875: 1987) for building-type structures, including partial wind cases
Seismic loads are generated automatically (ASCE 7-16/10/05/02, CBC 2001, IBC 2000, UBC 1997, NBC 15/10/05, NTC 2004, & IS 1893: 2002) for building-type structures, including accidental torsion
Analysis Features
Analysis of 1D members (beams, columns, braces, etc.) using Finite Element Method
Analysis of 2D elements (plates, walls) using Finite Element Method
Analysis of 3D elements (solids) using Finite Element Method
Partial fixity member end releases using rotational spring constants
Simpson Strong-Tie Yield Link as member end releases
Orthotropic Plate Material
Time History Analysis
Accelerated true sparse solver for static analysis
Accelerated Sparse Lanczos dynamics solver, very fast and robust
Flexible modeling of P-Delta effects
Multiple simultaneous dynamic and response spectra analysis using Gupta, CQC or SRSS with automatic calc of scaling factors
Automatic inclusion of mass offset (5% or user defined) for dynamics when integrated with RISAFloor
Ritz vector dynamic solver
True physical member modeling (members are aware of interior joints)
Plate/shell elements with plane stress only option
8 node solid elements
High end mesh generation — draw a polygon with any number of sides to create a mesh of well formed quadrilateral (NO triangular) elements
Automatic rigid diaphragm modeling with detachable joints
Area loads with one-way or two-way distributions with optional “blow through” distribution for loading open structures
Plate thermal loads
Simultaneous moving loads, AASHTO/custom for bridges, cranes…
Torsional warping calculations for stiffness, stress and design of hot rolled steel
Member end releases, rigid end offsets, analysis offsets
Enforced joint displacements
One Way members, for tension only bracing, slipping, etc.
One Way springs, for modeling soils and other effects
Euler members: Compression up to buckling load, then disable
Stress calculations on any arbitrary shape
Inactivate members, plates, solids and diaphragms without deleting them
Story drift calculations provide relative drift and ratio to height
Automatic self-weight calculations for members, plates and solids
Design Features
Designs/optimizes concrete, hot rolled & cold formed steel, masonry, wood and aluminum
Program selected or user-defined rebar layouts for flexure and shear
Concrete beam detailing (Rectangular, T and L).
Concrete column interaction diagrams
Concrete wall design including in-plane, out-of-plane & bearing loads
Automatic spectra generation for ASCE 7, NBC, IS 1893, NTC
Extensive user controlled generation of load combinations
Intelligent unbraced length calculations for physical members
Tapered wide flange design per AISC Design Guide 25
Masonry wall design for in-plane and out-of-plane
Wood Shapes: Complete NDS species/grade and Glulam database
Complete wood wall design for bearing & shear walls: Segmented, Perforated & Force Transfer Around Openings design methods
Strap and Hold Down design for Wood Shear Walls
Seismic design of concrete walls using ACI 318-14 Chapter 18
Concrete seismic coupling beams for multi-story walls with diaphragms
Capacity-Limited Seismic Design for Special Concentrated Braced Frames (SCBF)
Buckling Restrained Brace (BRB) seismic checks using CoreBrace elements
Results Features
Graphic presentation of color-coded results and plotted designs
Color contours on plates, solid stresses/forces with smoothing and animation
Spreadsheet results with sorting and filtering of: deflections, forces, stresses, optimized sizes for strength or deflection, code designs, concrete reinforcing, material takeoffs, etc.
Standard and user-defined reports
Graphic member detail reports with force/stress/deflection diagrams and detailed design calculations and expanded diagrams
Graphics Features
Unlimited simultaneous model view windows
“True to scale” rendering with translucency, even when drawing
High-speed redraw algorithm for instant refreshing
Dynamically zoom, pan, rotate, scroll, snap views
Font and color control
Saved views to quickly restore frequent or desired views
Rendered or wire-frame animations of deflected model and mode shapes
Animation of moving loads with speed control
Distance tool for measuring between points
Force/moment summation about any arbitrary cut line
High quality customizable graphics printing
Integrated Building Design
RISA-3D, RISAFloor, RISAFoundation and RISAConnection are so tightly integrated that they operate as one program on the same building model. Optimize the gravity system in RISAFloor, the lateral system in RISA-3D, the connection design in RISAConnection and the foundation system in RISAFoundation, with a complete flow of information both ways.
Integration supported for the following versions: RISA-3D v22, RISAFloor v18, RISAFoundation v16 and RISAConnection v14
General Features
Compatible with Windows 8.1/10/11 (64-bit Windows)
Program technical support provided by Professional Engineers