|Table of Contents|

Flexural behavior test of high strength steel I beam

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2012年06期
Page:
52-58
Research Field:
Publishing date:

Info

Title:
Flexural behavior test of high strength steel I beam
Author(s):
DUAN Lan;  ZHANG Liang;  WANG Chun-sheng;  ZHENG Li
Key Laboratory for Bridge and Tunnel of Shaanxi Province, Chang’an University, Xi’an 710064, Shaanxi, China
Keywords:
bridge engineering;  high strength steel;  hybrid design;  flexural behavior;  ultimate capacity;  ductility
PACS:
U441.2
DOI:
-
Abstract:
In order to study flexural behavior and ductility of high strength steel beam, the bending test adopt three point loading was conducted on 3 hybrid high strength simple supported I beams fabricated by high performance steel HPS 485W(with nominal yield strength of 485 MPa)and traditional steel grade Q345. The strain, deformation characteristics, ultimate failure mode and flexural capacity were analyzed, during the whole loading process. The results show that the plastic joint is formed for each test beam at failure under effective lateral bracing. The failure mode of these 3 test beams is local buckling in both compressive flange and compressive web near the mid-span.For the hybrid high strength steel beam, there are an optimal steel grade combination field between flange and web. When the higher strength HPS 485W flanges are adopted, the web strength is suggested to be more than that of Q345. Dimension of flanges is the major factor affecting both flexural capacity and ductility of test beam. With the increase of flange slenderness, the local buckling in compressive flange occurs much earlier and the amplitude of buckling wave is much greater at inelastic loading phase, thus the ductility in inelastic region is reduced. 4 tabs, 11 figs, 16 refs.

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Last Update: 2012-12-30