Fatigue performance analysis of steel concrete composite structure PBH shear connectors
Fan Liang , Yan Longbiao , Lyu Na
DOI:10.11835/j.issn.1674-4764.2016.06.013
Received March 07, 2016,Revised , Accepted , Available online July 04, 2017
Volume ,2016,Pages 97-104
- Abstract
PBH test model is designed and 240000 times fatigue tests were conducted to investigate the steel box-concrete composite structure of PBH shear connector under repeated load fatigue performance. The fatigue failure pattern and test data are analysed. Take advantage of the finite element software to analysis the floor opening aperture, wear into the steel bar diameter, concrete strength influence of the PBH fatigue. Results showed that the PBH's fatigue failure pattern is similar to static, which is concrete surface appear oblique splitting cracks, concrete tenor crushed, through the steel yield. Fatigue damage can be divided into beginning and development and damage three stages, the development stage accounted for 91.7% of the whole fatigue stage, structural stiffness in the beginning and development stages degradation slower, fast during the damage stage. Three parameters are of great influence on the fatigue life of PBH, among them through the bar diameter's influence particularly prominent.