Current Revision posted to RAM | STAAD Wiki by Seth Guthrie on 8/29/2017 5:45:43 PM
Subtitle
Applies To | |||
Product: | Ram Elements | ||
First Affected Version: | 13.05.00.224* | ||
Found in Version: | 14.00.00.240 | ||
Fixed and Released in Version: | |||
Environment: | All | ||
Area: | Design | ||
Severity: | High | ||
Issue #: | 745717 |
Problem Description
In models with tension-only members (or compression-only members), the Amplified first-order elastic analysis method should not be considered in the Design settings for Steel AISC code design.
The symptoms can include tension-only braces being designed for significant axial compression (and usually failing), braces being designed for no force at all, or other members being designed for forces that are very different from the analysis results.
Solution
Do not include this option for Amplified first-order elastic analysis in the Design Settings when the model includes tension-only members.
When second order P-Delta analysis is considered, this option is not available, so the problem cannot affect models using P-Delta.
Tags: Active, RAM Elements, P-delta, known issue, defect