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Experimental investigation of the hysteritic behavior of wide-flange steel columns under high axial and lateral drift demands

Experimental investigation of the hysteritic behavior of wide-flange steel columns under high axial and lateral drift demands
Experimental investigation of the hysteritic behavior of wide-flange steel columns under high axial and lateral drift demands
This paper discusses the findings from a large-scale experimental program that characterized the hysteretic behavior of typical steel wide-flange columns in steel moment-resisting frames (MRFs). The test specimens were tested in a cantilever configuration with a fixed point of inflection. The main testing parameters included various lateral and axial loading histories, the applied axial compressive load and the local slenderness of the cross-section. It is shown that (a) steel columns subjected to high compressive axial loads (i.e., larger than 50% of their critical axial load) should not be treated as forced-controlled elements as suggested by ASCE/SEI 41-13;(b) the axial shortening is an important deterioration mode that should be explicitly considered as part of the seismic design process of columns in steel MRFs; (c) end columns are characterized by non-symmetric hysteretic behavior due to the dynamic overturning effects during an earthquake. The test program provided unique experimental data that characterized the monotonic backbone curve of steel columns through the loss of their axial load carrying capacity under various levels of axial load ratios.
Steel columns, Large scale testing, High axial load, Column stability
Lignos, Dimitrios G.
9f55ad65-7b12-4ad6-972c-5a967ec0497b
Cravero, Julien
4d771f6e-6235-4746-9702-fcce9364aa23
Elkady, Ahmed
8e55de89-dff4-4f84-90ed-6af476e328a8
Lignos, Dimitrios G.
9f55ad65-7b12-4ad6-972c-5a967ec0497b
Cravero, Julien
4d771f6e-6235-4746-9702-fcce9364aa23
Elkady, Ahmed
8e55de89-dff4-4f84-90ed-6af476e328a8

Lignos, Dimitrios G., Cravero, Julien and Elkady, Ahmed (2016) Experimental investigation of the hysteritic behavior of wide-flange steel columns under high axial and lateral drift demands. 11th Pacific Structural Steel Conference, Shanghai, China. 29 - 31 Oct 2016.

Record type: Conference or Workshop Item (Paper)

Abstract

This paper discusses the findings from a large-scale experimental program that characterized the hysteretic behavior of typical steel wide-flange columns in steel moment-resisting frames (MRFs). The test specimens were tested in a cantilever configuration with a fixed point of inflection. The main testing parameters included various lateral and axial loading histories, the applied axial compressive load and the local slenderness of the cross-section. It is shown that (a) steel columns subjected to high compressive axial loads (i.e., larger than 50% of their critical axial load) should not be treated as forced-controlled elements as suggested by ASCE/SEI 41-13;(b) the axial shortening is an important deterioration mode that should be explicitly considered as part of the seismic design process of columns in steel MRFs; (c) end columns are characterized by non-symmetric hysteretic behavior due to the dynamic overturning effects during an earthquake. The test program provided unique experimental data that characterized the monotonic backbone curve of steel columns through the loss of their axial load carrying capacity under various levels of axial load ratios.

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More information

Published date: October 2016
Venue - Dates: 11th Pacific Structural Steel Conference, Shanghai, China, 2016-10-29 - 2016-10-31
Keywords: Steel columns, Large scale testing, High axial load, Column stability

Identifiers

Local EPrints ID: 433682
URI: https://eprints.soton.ac.uk/id/eprint/433682
PURE UUID: 97fe662a-b5b1-4105-a622-68e72873bf54

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Date deposited: 30 Aug 2019 16:30
Last modified: 30 Aug 2019 16:30

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