Bathe & Wilson eigenvalue problem

2D 9-story 10-bay Frame

Results presented by Bathe & wilson in 1972 and again by Peterson in 1981

used in verification by SAP2000: SAP2000 Integrated Finite Element Analysis and Design of Structures, Verification Manual, Computers and Structures, 1997. Example 2.

and seismo-struct (Example 10) SeismoStruct, Verification Report For Version 6, 2012. Example 10.

References  

1. Bathe, K.J and Wilson, E.L.Large Eigenvalue Problems in Synamic Analysis, ASCE, Journal of Eng. Mech.. Division, 98(6), 1471-1485, DOI: 10.1061/JMCEA3.0001693 
2. Peterson, F.E. EASE2, Elastic Analysis for Structural Engineering, Example Problem Manual, Engineering Analysis Corporation, Berkeley, CA 1981.