Seismic stability and the force reduction factor of code-designed one-storey asymmetric structures

✍ Scribed by De Stefano, Mario; Rutenberg, Avigdor

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 481 KB
• Volume: 28
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(199907)28:7<785::aid-eqe842>3.0.co;2-l

✦ Synopsis

This paper evaluates the stability bounds of the force reduction factor R of unidirectionally loaded UBC designed asymmetric one-storey systems having di!erent mass and sti!ness distributions. It is shown that whereas the instability e!ects due to torsional response are neutralized by the asymmetry-related overstrength, instability bounds may still be lower than the R-values prescribed by the code. Results of a limited study indicate that bidirectional ground motion tends to reduce further the safety margin against dynamic instability.