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Experimental research on limit value of axial compression ratio for concrete frame columns with central reinforcement(PDF)

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

Issue:
2005年04期
Page:
45-49
Research Field:
Publishing date:
2006-12-20

Info

Title:
Experimental research on limit value of axial compression ratio for concrete frame columns with central reinforcement
Author(s):
GUO Jun-qing;  WANG Xue-yun;  LEI Zi-xue;  ZHOU Tian-hua
School of Architectural Engineering, Chang'an University, Xi'an 710061, China
Keywords:
concrete frame column with central reinforcement;  experimental research;  ductility;  limit value of axial compression ratio
PACS:
TU973.15
DOI:
-
Abstract:
In order to solve the problems frequently that the concrete frame columns are too fat and too lightly reinforced in the design of high-rise structures because of the limit values of axial compression ratio, through the test of six specimens of concrete frame column with central reinforcement under cyclic lateral loading, authors investigated the properties and failure pattern of specimens, analyzed the major factors affecting the ductility of concrete frame columns with central reinforcement, and studied the test results of each specimen, including V and Δ hysteresis curve, displacement ductility ratio, ultimate displacement rotation, etc. The test results show that axial compression ratio, volumetric tie ratio and longitudinal reinforcement ratio of central reinforcement are among the major factors affecting both the ductility and elastic-plastic behavior of concrete frame columns and that at a high level of axial compression ratio, large volumetric tie ratio and longitudinal reinforcement ratio are important measures to ensure good seismic ductility of concrete frame columns with central reinforcement. Finally,new limit values of axial compression ratio were recommended for concrete frame columns with central reinforcement.

References:

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Memo

Memo:
-
Last Update: 2006-12-20