|Table of Contents|

Size Effect of Dynamic Failure of Reinforced Concrete Column Under Axial Compression(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年05期
Page:
62-70
Research Field:
Publishing date:

Info

Title:
Size Effect of Dynamic Failure of Reinforced Concrete Column Under Axial Compression
Author(s):
ZHOU Hong-yu1;  YUAN Hui1;  XING Xiao-shuai1;  ZHAO Xiao-hua2;  ZHANG Ya-ran1
(1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2. China Building Technique Group Co.,Ltd, Beijing 100013, China)
Keywords:
reinforced concrete short column;  axial compression;  size effect;  strain rate effect;  bearing capacity;  correction factor
PACS:
TU375.3
DOI:
-
Abstract:
In order to study the size effect of dynamic failure of reinforced concrete(RC)member under seismic load, six reinforced concrete short columns with different sizes were subjected to axial compression tests at different loading rates(the strain rate was in the range of 1×10-5 to 1×10-2 s-1). According to test results, the failure characteristics of RC axial compression columns under the influence of strain rate and size effect were analyzed from load-displacement curve, ductility, reinforcement and concrete strain and other aspects. Based on the measured data, a correction factor for calculating the bearing capacity of RC axial compression short columns was proposed. The study results show that the change of the loading velocity has no obvious effect on the failure characteristics of RC axial compression short columns in the studied range of strain rate, but there is a certain difference when size changes. The ultimate bearing capacity also has size effect, as a whole, it decreases when size increases, but its reduction effect is much smaller than that of strain rate. The displacement at peak load decreases with the increase of loading rate. The ductility increases when size increases but decreases when strain rate increases, and the influence of the size is greater than the strain rate. The proposed correction factor for calculating the bearing capacity of RC axial compression short columns will provide reference for quantitative calculation and analysis of similar problems.

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Last Update: 2019-09-29