Second Order Analysis of a 47-Story Buildingby Larry Griffis, Walter P. Moore & Associates, Inc, Houston, TX, USA,
Ali Haris, Walter P. Moore & Associates, Inc, Houston, TX, USA,
Javier Horvilleur, Walter P. Moore & Associates, Inc, Houston, TX, USA,
Document Type: Proceeding Paper
Part of: Materials and Member Behavior
A modern day second order analysis and ultimate strength review is made of a hypothetical 47-story unbraced frame designed under the 1969 AISC Specification. The original design is part of a study of high rise building structural schemes in use in the late 1960's. The paper discusses in detail the design assumptions of the original frame. A discussion is made of the AISC interaction equations and some of the possible pitfalls in their usage. A reanalysis of the frame is made using an iterative P-Delta procedure and a one-step P-Delta analysis using modern day frame analysis programs that directly account for the P-Delta effect. An ultimate strength study is performed on the frame using an analytical approach developed at Lehigh University to estimate the true 'safety factor' of the original design.
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