Connections to concrete-filled steel tubes

The objective of this research program was to study connections to concrete-filled steel tubes. This research focused on the connection to circular steel tubes, because this shape presents more detailing difficulties compared to the square counterpart. To accomplish the goals of this study, the research was divided into three phases: prototype frame design and analysis, a finite element analysis of several connections, and an experimental study on six large-scale connection specimens. In the first phase, two prototype moment-resisting steel frames were designed to satisfy the 1991 NEHRP Provisions. The inelastic performance of these frames was studied, and the connections with the highest ductility demand were isolated. The second phase of the research was devoted to the inelastic finite element analysis of several connection details. A 3-D finite element model was developed for each connection detail. The parameters used in the analytical study included: the diameter-to-tube wall thickness ratio, the applied axial load on the column, the moment-to-shear ratio of the girder, and the yield strength of the steel tube. In the third phase of the research, six 2/3rd-scale specimens were fabricated and tested with the quasi-static method. The flexural strength of the connection was the primary concern in this study. The analytical models and each experimental specimen were a T-shape configuration. A monotonic load was applied to the analytical finite element models. For the test specimens, a predetermined cyclic displacement was imposed at the girder tip, and the specimens were tested to destruction.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil and Environmental Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Alostaz, Y.M.

Contributors dc:contributor

• Schneider, Stephen P.

• Engineering, Civil

Statement dc:rights

• Copyright 1996 Alostaz, Yousef Mohammed

Language dc:language

eng

Identifier

9780591254112
AAI9717246
(UMI)AAI9717246

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/23216