|Table of Contents|

Variation Rules of Cross-section Size Effect of High-strength Concrete Frame Column(PDF)

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

Issue:
2019年05期
Page:
119-126
Research Field:
Publishing date:

Info

Title:
Variation Rules of Cross-section Size Effect of High-strength Concrete Frame Column
Author(s):
ZHANG Guo-jun
(College of Civil Engineering, Shanghai Normal University, Shanghai 201418, China)
Keywords:
high strength concrete;  frame column;  size effect;  flexural failure;  nominal moment;  ductility;  stiffness;  energy dissipation
PACS:
TU375.3
DOI:
-
Abstract:
According to the collected test results of 117 high-strength concrete frame columns under fixed axial load and horizontal repeated load, the skeleton curve, yield displacement and yield load, maximum displacement and maximum load, ultimate displacement and ultimate load, ductility coefficient, elastic stiffness, strengthening stiffness, maximum stiffness and degradation stiffness, area of each hysteretic loop and accumulated hysteretic loop area of the test column were calculated by the program compiled by MATLAB software. The relationship between them and section area or section height was fitted linearly by ORIGIN software. Then the influences of section size on bearing capacity, ductility, stiffness and energy consumption of frame columns were analyzed according to ORIGIN software regression results. The results show that with the increase of section area, the nominal bending moment decreases gradually. The ratio of the maximum bearing capacity of specimens to the maximum bearing capacity calculated according to the code decreases gradually, and the ductility of frame columns decreases gradually. With the increase of section height, the ultimate displacement angle of frame columns decreases gradually, the strengthening stiffness, degradation stiffness and ratio of maximum stiffness to elastic stiffness of frame columns increase gradually, and the average energy dissipation coefficient of frame columns decreases gradually.

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Last Update: 2019-09-29