Engineering Mechanics ›› 2018, Vol. 35 ›› Issue (9): 197-206.doi: 10.6052/j.issn.1000-4750.2017.11.0797

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EXPERIMENTAL AND NUMERICAL ANALYSIS ON MECHANICAL BEHAVIOR OF ECCENTRICALLY LOADED SELF-COMPACTING CONCRETE SHORT COLUMNS WITH 500 MPa STEEL BARS

ZHUO Wei-dong1,2, HUANG Lu1, CHEN Zhen3, YE Gao-ming1, HUANG Xin-yi1,2   

  1. 1. College of Civil Engineering, Fuzhou University, Fuzhou 350116, China;
    2. Fujian Key Laboratory of Multi-Disasters Prevention and Mitigation in Civil Engineering(Fuzhou University), Fuzhou 350116, China;
    3. Fujian Communications Planning and Design Institute, Fuzhou 350004, China
  • Received:2017-11-01 Revised:2018-04-03 Online:2018-09-29 Published:2018-09-15

Abstract: Seven self-compacting concrete short column specimens with 500 MPa reinforced bars were tested under eccentric compression load to investigate the mechanical behaviors and the co-working performance between high-strength steel bars and self-compacting concrete. The experimental results indicate that the 500 MPa steel bars can work well with self-compacting concrete, and the average axial strains of the specimens basically agree with the assumption of plane section under the whole process of eccentric compression loading. Finite element (FE) models for the eccentrically compressed short columns were built by ABAQUS software, and the FE models were verified by the test results. Furthermore, numerical analysis was carried out to study the influence of strength of self-compacting concrete, initial eccentricity and ratio of longitudinal reinforcement. The results show that normal section bearing capacities of eccentrically compressed self-compacting concrete short columns with 500 MPa reinforced bars can be calculated according to the current Chinese code. Moreover, the design strength of 500 MPa steel bars are suggested as fsd=fsd'=420 MPa, and partial coefficient of the material is suggested as γs=1.2.

Key words: high-strength steel bars, self-compacting concrete, eccentric compression, capacity, design strength

CLC Number: 

  • TU375.3
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