FEM in a Design Code Environment

by Philip V. DeSantis, (M.ASCE), DeSantis Engineering Software Inc, Cleveland, United States,
James E. Wild, (M.ASCE), DeSantis Engineering Software Inc, Cleveland, United States,

Document Type: Proceeding Paper

Part of: Computing in Civil Engineering


The results obtained from the use of finite element based analysis tools have created a new problem for designer: Which numbers do we use to check against Code limits? Most of the commonly used design codes were formulated before computers came into routine use. The very nature of the basic design assumptions used in setting stress limits were those typically associated with hand calculations, such as `plane section remain plane' and bending stress is found from Mc/I. This paper will attempt to define the problems faced by the design engineer using the AASHTO Cod and the ANSYS finite element program. The examples are very simple structures: the base plates attached to cantilevered highway exit signs. We are demonstrating how today's computer techniques might be used to accept or reject design solutions which have been historically used.

Subject Headings: Finite element method | Computer aided design | Computer analysis | Stress analysis | Traffic analysis | Computing in civil engineering | Highway and road design | Load and resistance factor design

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