Analysis

10 results found

June 21, 2018 | Tips & Tricks

Beam Deflection Ratio Options

RISA-3D v16.0.4 introduces an enhancement that allows for more control over the beam deflection ratio through Deflection Ratio Options. Read More

September 11, 2017 | Tips & Tricks

Improved Drift Reporting

RISA-3D v15 now includes automatic drift definitions for diaphragms as well as simplified story drift application. Read More

July 12, 2016 | Tips & Tricks

Camber Design Rules in RISAFloor

RISAFloor has the ability to assign camber design rules which allow the user more control over which members are cambered. A camber is the slight upward curvature of a steel beam which Read More

December 9, 2015 | Tips & Tricks

Envelope Detail Report Results

RISA-3D v14 introduced envelope detail reports for all material members. Read More

September 16, 2015 | Tips & Tricks

How RISA-3D Calculates Member Deflection Ratios

This article takes a look at how RISA-3D calculates member deflection ratios. Read More

September 9, 2015 | Tips & Tricks

Why don’t the Beams in my Frame have axial force?

This article discusses how adding rigid diaphragms to floor levels removes axial load from the floor beams. Read More

August 27, 2014 | Tips & Tricks

What is a Rigid Link in RISA-3D?

A rigid link is a member element in RISA-3D that can be used for many advanced modeling procedures. It is so useful that it is included as one of the default member Section Sets, as you’ll see below. Read More

October 9, 2013 | Tips & Tricks

What is the Tau b Factor and how does it affect my analysis?

When solving a RISA-3D model with hot rolled steel members under the AISC 360-05 (13th Edition) or AISC 360-10 (14th Edition) codes you may find references to a factor called Tau_b. Read More

September 6, 2013 | Tips & Tricks

Why Are The Steel Beam Deflections So Large?

When solving a RISA-3D model with hot rolled steel members using AISC 360 code, some member deflections are 20% larger than expected due to a stiffness reduction applied to certain members. Read More

February 23, 2012 | Tips & Tricks

How Do I Resolve a P-Delta Instability?

Investigating P-Delta instabilities in RISA-3D (or RISA-2D) can be difficult but this article includes some tips & tricks on how to determine what is causing the issue in your model. Read More